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1
Pimentel, Lauanne Oliveira, i Jeane de Almeida do Rosário. "Evaluation of Energy Complementarity Between Wind, Solar and Water Resources in the Municipality of Lages (Santa Catarina, Brazil)". Revista de Gestão Social e Ambiental 18, nr 5 (15.03.2024): e05462. http://dx.doi.org/10.24857/rgsa.v18n5-030.
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Purpose: Evaluate the energy complementarity between hydro, wind, and solar resources, and size a wind system and a photovoltaic system to meet the same production of the CGH Caveiras, (Lages/SC).
Methods: Wind and solar systems were sized in order to meet the production of CGH Caveiras, from commercial models of equipment and considering data from 2017 to 2019. To assess complementary, data from the same period were obtained from the river monitoring station of ANA and the meteorological station of INMET.
Results and Conclusion: In order to meet the demand of CGH Caveiras, only 1 medium sized wind turbine or 915 photovoltaic modules of the chosen models for the study would be necessary, and both systems could be used to compensate for periods of low hydroelectric production. The complementarity was confirmed through Pearson coefficients, where -0.39 was obtained between hydro and wind, and -0.32 between hydro and solar. Temporal complementarity indices, in turn, indicate complementarity between hydro and solar (κhs = 0.778) and between hydro and wind (κhe = 0.611).
Research Implications: Both wind and solar resources exhibit complementarity with the hydro patterns of the study area, and either of the proposed systems, wind or photovoltaic solar, could be used in a hybrid manner with the existing hydroelectric system, especially during periods of droughts.
Originality/value: Considering the scarcity of energy complementarity studies in Santa Catarina, as well as the impact of climate change on the hydrological regime and hydroelectric power generation, research of this nature is essential for the region’s energy security.
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Cai, Wen Bin, Kang Du, Xing Peng i Hua Yang Liu. "Study on Pumping Units with Wind Power Generation Complementary Power Supply System". Advanced Materials Research 361-363 (październik 2011): 479–82. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.479.
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The wind power generation pumping unit has environmental protection and the energy-saving function with wind power generation complementary power supply system. Based on the calculation of the pumping power consumption during the oil production, the essential wind-power generation electric quantity for pumping equipment runs stable was analyzed, wind-electricity and electric network complementary energy transmission and control circuit were designed, When the wind speed changes, by the energy transmission and control circuit related parameters and taking the historical meteorological statistics of the corresponding period as the comparison reference, the system can control wind power generation and the battery charge and discharge flexibly to ensure the equipment runs stable, which lays a firm foundation for the wide application of the off-grid wind power. The economic analysis shows that the wind-electricity and electric network complementary pumping machine has good economic efficiency and application prospect in oilfield.
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Nogueira, Erika Carvalho, Rafael Cancella Morais i Amaro Olimpio Pereira. "Offshore Wind Power Potential in Brazil: Complementarity and Synergies". Energies 16, nr 16 (10.08.2023): 5912. http://dx.doi.org/10.3390/en16165912.
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Renewable sources stand out in energy planning due to their contribution to greenhouse gas emission reduction when displacing fossil fuels and the enhancement of energy security through the diversification of the energy matrix. Understanding and optimizing the complementary operative synergy between different energy sources over time and space leads to efficient policies. This article uses an hourly Pearson’s correlation coefficient to explore the complementarity between offshore wind and other power generation sources in the Brazilian matrix. An analysis of offshore wind power feasibility in the Brazilian power system will be conducted, considering environmental implications, synergies with the oil industry, costs, and complementarities with other energy sources. The methodology uses an optimization model to minimize costs and optimize the production mix while considering the time series of renewable energy, subject to demand constraints, renewable resource availability, reservoir storage, capacity limitations, and thermal generation. The study concludes that the northeast and southeast electrical subsystems must start offshore wind installation in Brazil due to their complementarity with hydropower production, synergy with the oil and gas industry, and proximity to the largest consumption spots.
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Wang, Hui, Xiaowen Chen, Qianpeng Yang, Bowen Li, Zongyu Yue, Jeffrey Dankwa Ampah, Haifeng Liu i Mingfa Yao. "Optimization of Renewable Energy Hydrogen Production Systems Using Volatility Improved Multi-Objective Particle Swarm Algorithm". Energies 17, nr 10 (15.05.2024): 2384. http://dx.doi.org/10.3390/en17102384.
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Optimizing the energy structure to effectively enhance the integration level of renewable energy is an important pathway for achieving dual carbon goals. This study utilizes an improved multi-objective particle swarm optimization algorithm based on load fluctuation rates to optimize the architecture and unit capacity of hydrogen production systems. It investigates the optimal configuration methods for the architectural model of new energy hydrogen production systems in Xining City, Qinghai Province, as well as the internal storage battery, ALK hydrogen production equipment, and PEM hydrogen production equipment, aiming at various scenarios of power sources such as wind, solar, wind–solar complementary, and wind–solar–storage complementary, as well as intermittent hydrogen production scenarios such as hydrogen stations, hydrogen metallurgy, and continuous hydrogen production scenarios such as hydrogen methanol production. The results indicate that the fluctuation of hydrogen load scenarios has a significant impact on the installed capacity and initial investment of the system. Compared with the single-channel photovoltaic hydrogen production scheme, the dual-channel hydrogen production scheme still reduces equipment capacity by 6.04% and initial investment by 6.16% in the chemical hydrogen scenario with the least load fluctuation.
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He, Xueqian, Tianguang Lu i Zhifan Liu. "Benefit Evaluation of Hydrogen Production System Harnessing Curtailed Wind Considering Integrated Demand Response". Journal of Physics: Conference Series 2584, nr 1 (1.09.2023): 012020. http://dx.doi.org/10.1088/1742-6596/2584/1/012020.
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Abstract With the continuous increase of wind power installed capacity in China in recent years, the problem of wind curtailment has become increasingly serious. Using curtailed wind power for hydrogen production is an effective way to reduce wind curtailment. In this paper, based on the complementary characteristics of various energies in the electric-hydrogen system, a capacity planning model of the energy system considering wind curtailment wind-to-hydrogen technology and integrated demand response is established. The proposed model utilizes a fast unit commitment technology, with the function of solving the optimum capacity of various equipment in the electrolytic hydrogen production system under different wind curtailment utilization rates and different wind power installed capacities. A case study based on Xinjiang province, which has rich wind energy resources, is conducted to obtain the optimal composition of new-built capacities of the electrolytic hydrogen production system. In light of the simulation results, the levelized cost of hydrogen is proportional to the wind power installed capacity and inversely proportional to the utilization rate of wind curtailment.
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Lu, Cun, Leping Yang, Wen Qi i Zhan Han. "Research on Control Strategy of Multi-Energy Complementary Microgrid for Wind-Solar Hydrogen Production". International Journal of Energy 5, nr 3 (24.12.2024): 11–14. https://doi.org/10.54097/30vt8h35.
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The multi-energy complementary microgrid system is an effective supplement to the areas not covered by the large power grid, and can effectively solve the problem of electricity consumption in remote areas. Based on the research of wind power, photovoltaic, energy storage, hydrogen production and fuel cell systems, this paper builds a wind-solar hydrogen storage multi-energy complementary micro-grid DC network system, and puts forward cooperative control strategies of the system under different working conditions, so as to achieve stable operation of the system and maximize energy utilization. Finally, PSCAD simulation software is used to establish a simulation model for each distributed unit to verify the stability and rationality of the control strategy. The simulation results show that the control strategy can achieve efficient, cooperative and stable operation between different energy sources on the premise of ensuring the power quality of the microgrid.
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Lu, Cun, Leping Yang, Wen Qi i Zhan Han. "Research on Control Strategy of Multi-energy Complementary Microgrid for Wind-solar Hydrogen Production". Journal of Innovation and Development 9, nr 1 (19.11.2024): 18–22. http://dx.doi.org/10.54097/b1170w49.
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The multi-energy complementary microgrid system is an effective supplement to the areas not covered by the large power grid, and can effectively solve the problem of electricity consumption in remote areas. Based on the research of wind power, photovoltaic, energy storage, hydrogen production and fuel cell systems, this paper builds a wind-solar hydrogen storage multi-energy complementary micro-grid DC network system, and puts forward cooperative control strategies of the system under different working conditions, so as to achieve stable operation of the system and maximize energy utilization. Finally, PSCAD simulation software is used to establish a simulation model for each distributed unit to verify the stability and rationality of the control strategy. The simulation results show that the control strategy can achieve efficient, cooperative and stable operation between different energy sources on the premise of ensuring the power quality of the microgrid.
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Sellek, Andrew D., Naman S. Bajaj, Ilaria Pascucci, Cathie J. Clarke, Richard Alexander, Chengyan Xie, Giulia Ballabio i in. "Modeling JWST MIRI-MRS Observations of T Cha: Mid-IR Noble Gas Emission Tracing a Dense Disk Wind". Astronomical Journal 167, nr 5 (17.04.2024): 223. http://dx.doi.org/10.3847/1538-3881/ad34ae.
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Abstract [Ne ii] 12.81 μm emission is a well-used tracer of protoplanetary disk winds due to its blueshifted line profile. Mid-Infrared Instrument (MIRI)-Medium Resolution Spectrometer (MRS) recently observed T Cha, detecting this line along with lines of [Ne iii], [Ar ii], and [Ar iii], with the [Ne ii] and [Ne iii] lines found to be extended while the [Ar ii] was not. In this complementary work, we use these lines to address long-debated questions about protoplanetary disk winds regarding their mass-loss rate, the origin of their ionization, and the role of magnetically driven winds as opposed to photoevaporation. To this end, we perform photoionization radiative transfer on simple hydrodynamic wind models to map the line emission. We compare the integrated model luminosities to those observed with MIRI-MRS to identify which models most closely reproduce the data and produce synthetic images from these to understand what information is captured by measurements of the line extents. Along with the low degree of ionization implied by the line ratios, the relative compactness of [Ar ii] compared to [Ne ii] is particularly constraining. This requires Ne ii production by hard X-rays and Ar ii production by soft X-rays (and/or EUV) in an extended (≳10 au) wind that is shielded from soft X-rays, necessitating a dense wind with material launched on scales down to ∼1 au. Such conditions could be produced by photoevaporation, whereas an extended magnetohydrodynamic (MHD) wind producing equal shielding would likely underpredict the line fluxes. However, a tenuous inner MHD wind may still contribute to shielding the extended wind. This picture is consistent with constraints from spectrally resolved line profiles.
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Suo, Xun, Shuqiang Zhao i Yanfeng Ma. "Multipoint Layout Planning Method for Multienergy Sources Based on Complex Adaptive System Theory". International Transactions on Electrical Energy Systems 2022 (5.07.2022): 1–15. http://dx.doi.org/10.1155/2022/8948177.
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Summary. With the continuous expansion of grid-connected power generation from renewable energy sources, such as wind and light, the forms of power sources are more diversified. The coupling and uncertainty of multiple energy sources will cause significant changes in the characteristics of the power system. Problems like the complexity of the power system lack a scientific and complete explanation. This paper comprehensively considers the regional weather conditions, the uncertainty of the output of wind and solar energy sources, and the time and space complementary characteristics of multiple power sources. Based on the theory of complex adaptive systems, a systematic and holistic optimization planning method is studied. Combining the idea of complementarity because of differences, a multipoint layout planning and design method for multienergy power systems is proposed to give full play to the synergistic effects of natural resources, achieve optimal resource allocation, and provide a theoretical basis for improving the consumption of wind and renewable energy. Taking an actual provincial power system in China as an example, through the comparison of production simulation calculations and multiscenario analysis and planning methods, the proposed method can significantly increase the consumption of wind and solar renewable energy.
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Grant, E., K. Brunik, J. King i C. E. Clark. "Hybrid power plant design for low-carbon hydrogen in the United States". Journal of Physics: Conference Series 2767, nr 8 (1.06.2024): 082019. http://dx.doi.org/10.1088/1742-6596/2767/8/082019.
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Abstract In this study, we provide a nationwide techno-economic analysis of clean hydrogen production powered by a hybrid renewable energy plant for over 50,000 locations in the United States. We leverage the open-source Hybrid Optimization Performance Platform (HOPP) tool to simulate the hourly performance of an off-grid wind-solar plant integrated with a 1-GW polymer exchange membrane electrolyzer system. The levelized cost of hydrogen is calculated for varying technology costs, and tax credits to explore cost sensitivities independent of plant design, performance, and site selection. Our findings suggest that strategies for cost reduction include selecting sites with abundant wind resources, complementary wind and solar resources, and optimizing the sizing of wind and solar assets to maximize the hybrid plant capacity factor. These strategies are linked to increased hydrogen production and reduced electrolyzer stack replacements, thereby lowering the overall cost of hydrogen.
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Su, Wei, Qi Li, Wenjin Zheng, Yunyi Han, Zhenyue Yu, Zhang Bai i Yunbin Han. "Enhancing wind-solar hybrid hydrogen production through multi-state electrolyzer management and complementary energy optimization". Energy Reports 11 (czerwiec 2024): 1774–86. http://dx.doi.org/10.1016/j.egyr.2024.01.031.
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V, Chandra Mouli. "DESIGN AND DEVELOPMENT OF HYBRID POWER GENERATION BY SOLAR AND WIND ENERGY". INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, nr 03 (27.03.2024): 1–5. http://dx.doi.org/10.55041/ijsrem29722.
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This In our study, we delved into designing an optimal model for a hybrid solar-wind energy plant, meticulously considering various design parameters such as the number of photovoltaic modules, wind turbine height, number of turbines, and rotor diameter. Our aim was to minimize costs while ensuring consistent energy production. Our findings unequivocally revealed a distinct complementary relationship: during summer months, solar arrays predominantly met energy demands due to abundant solar radiation and minimal wind energy, whereas in winter, with higher wind speeds and reduced solar radiation, wind turbines became the primary energy suppliers. This study highlights the significant potential of leveraging synergies between solar and wind energy in an optimized hybrid system, ensuring reliable energy production year-round. Moreover, our project focused on exploring the feasibility of installing roof-mounted vertical wind turbines of various types, including those with shrouded blades, to enhance turbine efficiency. One notable advantage of vertical axis wind turbines is their ground-level installation, facilitating easy maintenance. Additionally, their omni-directional nature eliminates the need for precise alignment with the wind direction to generate power. Our main objective revolves around designing a self-starting vertical axis wind turbine using CATIA V5, aiming to contribute to the advancement of sustainable energy solutions. Key Words: Renewable energy source, vertical axis wind mill, power generation,catia v5
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Myksvoll, MS, AD Sandvik, IA Johnsen, J. Skarðhamar i J. Albretsen. "Impact of variable physical conditions and future increased aquaculture production on lice infestation pressure and its sustainability in Norway". Aquaculture Environment Interactions 12 (14.05.2020): 193–204. http://dx.doi.org/10.3354/aei00359.
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Salmon lice infestation is a challenge for wild post-smolt salmon during migration from their natal river to the sea in several regions of Norway. The traffic-light management system regulates growth in the aquaculture industry, where growth in production (6%) is only allowed if the impact of salmon lice on wild fish can be kept at a minimum and up to 10% mortality of wild salmonids are considered within the sustainability goal. We used a numerical ocean model, combined with an individual-based model for salmon lice, to evaluate the interannual variability in salmon lice concentrations in Production Zone 7, which was granted permission for production growth in 2017. Salmon lice releases were kept constant for 3 yr, while the physical conditions, e.g. wind and ocean circulation, varied. The total area of elevated lice infestations varied between 3.2 and 8.4% of the area within 5 km from the coast, due only to interannual physical variability mainly caused by variable wind patterns. Modeled post-smolts migrating out from the Namsen River (64.5°N, central Norway) towards the open ocean experienced mortality between 5 and 9%. Since Production Zone 7 was granted growth, we have simulated increased production and corresponding increases in lice releases. After 5 to 8 increments of 6% increase in production, the increase in salmon post-smolt mortality was of the same order of magnitude as the interannual variability. Information regarding migration route and time is crucial input to the model calculating post-smolt mortality, and inadequate information can affect the results significantly. These 2 methods (determining area of elevated lice infestations and estimating post-smolt mortality) provide complementary information and should be used in combination when the overall assessment of a production zone is made.
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Shi, Xiaofei, Yu Qian i Siyu Yang. "Fluctuation Analysis of a Complementary Wind–Solar Energy System and Integration for Large Scale Hydrogen Production". ACS Sustainable Chemistry & Engineering 8, nr 18 (14.04.2020): 7097–110. http://dx.doi.org/10.1021/acssuschemeng.0c01054.
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Suhartati, Tatik, Sugeng Wahyudiono i Ricky Ricky. "Hubungan Karakteristik Biometrik Eucalytus pellita Terhadap Kerusakan Karena Angin". HUTAN TROPIKA 17, nr 1 (2.06.2022): 95–103. http://dx.doi.org/10.36873/jht.v17i1.4440.
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Strong winds that occur can damage the Eucalyptus pellita plant thereby reducing wood production at the end of the rotation. Biometric characteristics are very important to predict the criteria for trees that are at risk of damage due to wind. This study aims to determine the biometric characteristics that play a role in the risk of trees being damaged by wind. The study was conducted on Eucalyptus pellita aged 5 years. The biometric characteristics studied consisted of diameter at breast height (DBH), total height (H) and crown length (CL) as well as the ratio of H/DBH (slenderness inde)x and CL/H (percentage of crown). Binary logistic regression analysis was used to analyized the probability of tree damage due to wind. The results showed that the regression model with the independent variable H/DBH was a suitable model. The H/DBH ratio or tree slenderness index is a biometric characteristic that contributes 11,4% to explain the risk of wind damage. Keywords: binary logistic regression ; percentage of crown; slenderness index
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Reul, N., B. Chapron, E. Zabolotskikh, C. Donlon, A. Mouche, J. Tenerelli, F. Collard i in. "A New Generation of Tropical Cyclone Size Measurements from Space". Bulletin of the American Meteorological Society 98, nr 11 (1.11.2017): 2367–85. http://dx.doi.org/10.1175/bams-d-15-00291.1.
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Abstract Wind radii estimates in tropical cyclones (TCs) are crucial to helping determine the TC wind structure for the production of effective warnings and to constrain initial conditions for a number of applications. In that context, we report on the capabilities of a new generation of satellite microwave radiometers operating at L-band frequency (∼1.4 GHz) and dual C band (∼6.9 and 7.3 GHz). These radiometers provide wide-swath (>1,000 km) coverage at a spatial resolution of ∼40 km and revisit of ∼3 days. The L-band measurements are almost unaffected by rain and atmospheric effects, while dual C-band data offer an efficient way to significantly minimize these impacts. During storm conditions, increasing foam coverage and thickness at the ocean surface sufficiently modify the surface emissivity at these frequencies and, in turn, the brightness temperature (Tb) measurements. Based on aircraft measurements, new geophysical model functions have been derived to infer reliable ocean surface wind speeds from measured Tb variations. Data from these sensors collected over 2010–15 are shown to provide reliable estimates of the gale-force (34 kt), damaging (50 kt), and destructive winds (64 kt) within the best track wind radii uncertainty. Combined, and further associated with other available observations, these measurements can now provide regular quantitative and complementary surface wind information of interest for operational TC forecasting operations.
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Cui, Jiahao, Zilin Liu, Naizhe Zhang i Xuanhua Guo. "Application of thermoflow in multi-energy complementary projects involving wind, solar, storage and fuel". Journal of Physics: Conference Series 2935, nr 1 (1.01.2025): 012005. https://doi.org/10.1088/1742-6596/2935/1/012005.
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Abstract The energy sector is going through changes aiming at the creation of new sources and improvement of existing ones to meet increasing demand. New energy sources have appeared, giving cleaner and renewable choices, but at the same time, many difficulties have emerged, like irregular supply and low energy density. This leads to the importance of multi-energy technologies to maintain efficiency and stability. This research used Thermoflow software to predict power plant performance, showing a good match with pre-production data and confirming the accuracy. Additionally, using this software for petrochemical purposes could improve economic efficiency and energy conversion, while building energy storage and developing smarter grid systems can help manage new energy inputs.
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Xu, Beibei, Jingjing Zhang, Shuai Yuan, Huanhuan Li, Diyi Chen i Junzhi Zhang. "Comprehensive Regulation Benefits of Hydropower Generation System in Reducing Wind Power Fluctuation". Water 13, nr 21 (22.10.2021): 2987. http://dx.doi.org/10.3390/w13212987.
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The use of renewable energy has become a necessity to generate electricity, and is taking the place of conventional coal-fired power, as it has clear economic and environmental benefits. The purpose of this paper is to quantify the comprehensive benefits of hydropower in reducing wind power fluctuation in a hybrid coal-fired/hydro/wind power system. To achieve this, a wind–hydropower generation system must be established, and its complementary characteristic is also illustrated based on the resultant wind speed. Then, based on Institute of Electrical and Electronics Engineers (IEEE) 14 Bus Power System, coal-fired generation is introduced to model a final hybrid integrated power system. The comprehensive benefit evaluation method, including the power consumption profit, the peak load profit, the energy conservation profit, the guide vane fatigue cost, the maintenance cost, and the start-stop cost, is presented to assess the join operation benefits of the wind/hydropower/coal-fired integrated system. The complementary investigation shows that the hydropower system has an excellent effect on suppressing wind power fluctuation, although the fatigue damage of hydraulic guide vanes is a little severe for the time scale of hours, compared with that of seconds. The quantified benefit shows that the increased power consumption profit, the increased guide vane fatigue loss cost, the decreased peak-load profit, and the increased energy conservation profit are RMB 1262.43 million/year, RMB 0.37 million/year, RMB 333.97 million/year and RMB 0.54 million/year, with the wind and hydropower ratio increasing from 16% to 25%, which directly leads to the annual total revenue increasing to RMB 143.2673 million. The implementation of this paper can contribute to making more efficient use of wind-hydro power in conventional electricity production.
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Dr. P Rukmangadha, Nithin A, Rajashekara Reddy M S, Shashank G i Shashank M S. "Development of A Power Generation Unit Using Dual Renewable Energy Source". International Journal of Scientific Research in Mechanical and Materials Engineering 8, nr 3 (22.05.2024): 40–44. http://dx.doi.org/10.32628/ijsrmme24837.
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The need for sustainable and environmentally friendly energy sources has driven research into renewable energy technologies. Among these, solar and wind energy are the most widely used and rapidly advancing. This paper discusses the development of a power generation unit that combines both solar and wind energy to create a dual renewable energy system. This system aims to optimize energy production by taking advantage of the complementary nature of these energy sources. The proposed system consists of photovoltaic (PV) panels and a small wind turbine integrated into a single power generation unit. The PV panels capture energy from sunlight, while the wind turbine harnesses wind energy. By integrating these two systems, the power generation unit can produce energy in varying weather conditions and at different times of the day. This leads to improved energy reliability and efficiency compared to single-source systems. The SWCM (Solar and wind combined mechanism) immensely reduces the requirement of fossil fuels to generate electricity which results in greatly reduced CO2 and CO-related emissions.
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Antonijević, Vladimir, Lazar Mlađenović, Goran Dobrić i Mileta Žarković. "Optimalno dimenzionisanje mikromreže sa obnovljivim izvorima energije u Srbiji". Energija, ekonomija, ekologija XXIII, nr 4 (2021): 16–22. http://dx.doi.org/10.46793/eee21-4.16a.
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The paper analyzes the formation of the microgrid in South Banat. The paper contains three scenarios related to determining the size of the distribution area of the part of the electric power system of Serbia that can potentially be powered only from renewable energy sources. Based on real data on the production of four wind farms in Serbia (Čibuk, Kovačica, Alibunar and Košava) for the period January - June 2019 and real consumption data, the first scenario was formed which refers to determining the part of distribution area that can be covered from existing wind farms. In this scenario, with respect to the criteria of uninterrupted power supply, the percentage share of energy from the electricity network was determined for different sizes of distribution area. In order to reduce the share of energy from the electricity network, a new scenario was considered, which refers to the addition of production capacities of solar energy. The analysis of the second scenario showed reduced cumulative intermittency of wind and solar power plants compared to the first scenario. The complementary nature of the sun and wind contributes to a better correlation between consumption and production. The third scenario involves adding storage capacity to the second scenario. A genetic algorithm was applied for the optimal determination of the storage capacity of a microgrid in both grid-connected and islanded modes. A correlation coefficient of production and consumption was formed for each scenario. A complete analysis was performed in order to consider the possibility of forming a microgrid in the part of the Serbian power system near wind farms. This analysis showed a reduction in transmission losses, a reduction in CO2 emissions and better voltage conditions.
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Huang, Kaijie, Chengjun Qiu, Wenbin Xie, Wei Qu, Yuan Zhuang, Kaixuan Chen, Jiaqi Yan, Gao Huang, Chao Zhang i Jianfeng Hao. "Design of a Seawater Desalination System with Two-Stage Humidification and Dehumidification Desalination Driven by Wind and Solar Energy". Water 16, nr 4 (18.02.2024): 609. http://dx.doi.org/10.3390/w16040609.
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The paper presents a wind–photovoltaic-thermal hybrid-driven two-stage humidification and dehumidification desalination system for remote island regions lacking access to electricity and freshwater resources. By conducting an analysis of the wind and solar energy resources at the experimental site, a suitable wind power station and photovoltaic power station are constructed. The performance of the wind–solar complementary power generation system is then evaluated based on factors such as output power, seawater desalination load power, battery compensation output, system energy consumption, and water production costs. A variable step gradient disturbance method based on the power–duty ratio is proposed for tracking the maximum power point (MPPT) of wind power generation. The output power of the photovoltaic power generation system is optimized, employing a fuzzy logic control (FLC) method to track the MPPT of photovoltaic power generation. This approach effectively addresses the issues of slow speed and low accuracy encountered by traditional MPPT algorithms in tracking the maximum power point (MPP) of both photovoltaic and wind power generations. In order to ensure that the desalination system can operate stably under different weather conditions, eight working modes are designed, and a programmable logic controller (PLC) is used to control the system, which provides a guarantee for stable water production. Experimental results demonstrate that the system exhibits stable performance, achieving a maximum water output of 80.63 Kg/h and daily water yield is 751.32 Kg, the cost of desalination equipment is 1.4892 USD/t.
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Zeng, Chun Nian, Hua Gui Chen i Yue Bao. "Complementary Power Controller of Wind-Solar Energy Based on Soft Switch PWM and Parallel Balanced Current Technology". Advanced Materials Research 588-589 (listopad 2012): 638–44. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.638.
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The demand of energy is increasing in today's society, to explore and utilize new energy sources is significant, especially as wind and solar energy can be reused. Today, the exploitation technology of solar-wind energy in countries is mature, however, there has always been weaknesses, eg: high development costs, low energy harvesting efficiency, poor control stability, such as the high cost of manufacturing solar panels and the limit of large power devices on the controller efficiency and power. In view of these difficulties above, this paper presents a method of resonant drive, all flow control to solved the problem of the controller's power and efficiency and improve the utilization ratio of battery board, and also reduce panels production cost indirectly. It is in line with national energy-saving emission reduction requirements. Finally, I used the technology to develop some stable products successfully, which are used in the field of communication base stations.
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Leseure, Michel. "From Aggregate Production Planning to Aggregate Energy Industrial Consumption Plans". Energies 17, nr 24 (19.12.2024): 6388. https://doi.org/10.3390/en17246388.
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The increasing use of renewable energy sources in national electricity networks is challenging because of intermittence, i.e., the fact that the availability of the fuel (e.g., solar irradiance, wind) is volatile. This is a new challenge for the energy sector that has led to much research about energy storage. In the manufacturing sector, dealing with the volatility of demand is not a new problem and is addressed by the application of aggregate production planning techniques. Solving an aggregate production planning problem is about finding the best trade-off because capacity and inventory utilization. This paper explores the application of this technique to energy management problems and explains how it can be used as a complementary solution to energy storage, showing how industrial entities can play an active role in greening the electricity sector, solely through a different planning of their inventory levels.
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Li, Jin Bin, Yao Yao, Tian Xia i Xiao Jiang Zheng. "Determination of Energy Storage Capacity for a Hybrid Renewable Power Generation System". Applied Mechanics and Materials 528 (luty 2014): 371–79. http://dx.doi.org/10.4028/www.scientific.net/amm.528.371.
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Using renewable resources, such as solar and wind energy for generation presents technical challenges in producing continuous and controllable power. Since it is difficult to predict and control the output of the renewable resources, an extra Energy Storage System (ESS) is needed to enable a proper management of the uncertain power production. The ESS acts like an energy buffer such that the renewable output power can be regulated to suit the operational requirements of the network. To reduce the capital investment for the storage devices, it is important to estimate reasonable storage capacities. This report proposes an integration of solar and wind energy to form a hybrid power generation system. The goal is to reduce the capacity of the ESS so as to maximize the economic benefit that can be obtained from energy captured from the hybrid renewable sources. In the project, the studied hybrid solar-wind power system is compared with a solar power system and a wind power system. Results show that the proposed hybrid scheme is feasible to reduce the ESS capacity, by taking advantage of the complementary nature of solar vs. wind generation.
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Lahlou, Yahya, Abdelghani Hajji i Mohammed Aggour. "Optimization of a Management Algorithm for an Innovative System of Automatic Switching between Two Photovoltaic and Wind Turbine Modes for an Ecological Production of Green Energy". International Journal of Renewable Energy Development 12, nr 1 (10.09.2022): 36–45. http://dx.doi.org/10.14710/ijred.2023.47137.
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Today, renewable energy and energy efficiency are key to limiting global warming and preventing the dangerous effects of climate change. The biggest problem with conventional solar and wind turbine systems is the intermittency of electrical power generation. Even if these two energy sources can be complementary, the space occupied by these hybrid systems remains very important. This work proposes an improved management algorithm for a patented transformable photovoltaic-wind system, which mainly uses two flexible photovoltaic panels which are automatically deformed by an electromechanical system from the planar shape to the semi-cylindrical shape of the Savonius wind turbine blades. When weather conditions change, this system switches to eco-friendly photovoltaic (PV) or wind turbine (WT) mode, allowing a good total power generation from two solar power sources or wind turbine power. The contribution brought for this work relates to the realization and the improvement of the management algorithm to determine a better change to the mode PV or the mode WT. The operation test was simulated in 8760 hours for the year 2021. This developed algorithm allows several theoretical calculations of the power produced from solar radiation and wind speed data, thereafter the algorithm compare and determines the overall power and selects the optimal PV or WT mode. In this study, the overall power generated by the invented system produces more electricity per hour, the power Pt increases by 75.55% compared to the power Pwt, and also the power Pt increases by 68.15% compared to Pvp power.
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Yu, Shuai, Yi Yang, Shuqin Chen, Haowei Xing, Yinan Guo, Weijia Feng, Jianchao Zhang i Junhan Zhang. "Study on the Application of a Multi-Energy Complementary Distributed Energy System Integrating Waste Heat and Surplus Electricity for Hydrogen Production". Sustainability 16, nr 5 (22.02.2024): 1811. http://dx.doi.org/10.3390/su16051811.
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To improve the recovery of waste heat and avoid the problem of abandoning wind and solar energy, a multi-energy complementary distributed energy system (MECDES) is proposed, integrating waste heat and surplus electricity for hydrogen storage. The system comprises a combined cooling, heating, and power (CCHP) system with a gas engine (GE), solar and wind power generation, and miniaturized natural gas hydrogen production equipment (MNGHPE). In this novel system, the GE’s waste heat is recycled as water vapor for hydrogen production in the waste heat boiler, while surplus electricity from renewable sources powers the MNGHPE. A mathematical model was developed to simulate hydrogen production in three building types: offices, hotels, and hospitals. Simulation results demonstrate the system’s ability to store waste heat and surplus electricity as hydrogen, thereby providing economic benefit, energy savings, and carbon reduction. Compared with traditional energy supply methods, the integrated system achieves maximum energy savings and carbon emission reduction in office buildings, with an annual primary energy reduction rate of 49.42–85.10% and an annual carbon emission reduction rate of 34.88–47.00%. The hydrogen production’s profit rate is approximately 70%. If the produced hydrogen is supplied to building through a hydrogen fuel cell, the primary energy reduction rate is further decreased by 2.86–3.04%, and the carbon emission reduction rate is further decreased by 12.67–14.26%. This research solves the problem of waste heat and surplus energy in MECDESs by the method of hydrogen storage and system integration. The economic benefits, energy savings, and carbon reduction effects of different building types and different energy allocation scenarios were compared, as well as the profitability of hydrogen production and the factors affecting it. This has a positive technical guidance role for the practical application of MECDESs.
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Andal C., Kothai, i Jayapal R. "Improved GA based power and cost management system in a grid-associated PV-wind system". International Journal of Power Electronics and Drive Systems (IJPEDS) 12, nr 4 (1.12.2021): 2531. http://dx.doi.org/10.11591/ijpeds.v12.i4.pp2531-2544.
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Renewable hybrids play an essential part in assisting India with quickening the decarbonisation of power production and lowering power production expense in the medium term. PV and wind energy are complementary to each other, making the system to generate electricity almost throughout the year. In this paper, a grid-associated PV-wind energy system tied with a battery is analysed. PV, wind, grid and battery are the sources to be effectively scheduled for uninterrupted power and cost minimisation. Energy management controllers use optimisation strategies for effective utilisation of sources and cost minimisation. The methodologies are detailed as optimisation problems. Limiting the household energy cost is considered as objective, and the delivery ratio of power offered to the grid and utilised locally is treated as the optimisation variable. In this paper, an improved genetic algorithm is proposed to solve the formulated nonlinear optimisation problems. The time-of-use tariff is becoming popular in India; therefore, this article analyses the improved genetic algorithm based intelligent power and cost management system under time-of-use tariff. Using MATLAB, the proposed approach's performance is presented with the comparative analysis of conventional self-made for self-consumed and rest for sale mode and genetic algorithm-based energy management controller.
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Li, Zheng, Yan Qin, Xin Cao, Shaodong Hou i Hexu Sun. "Wind-Solar-Hydrogen Hybrid Energy Control Strategy Considering Delayed Power of Hydrogen Production". Electrotehnica, Electronica, Automatica 69, nr 2 (15.05.2021): 5–12. http://dx.doi.org/10.46904/eea.21.69.2.1108001.
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In order to meet the load demand of power system, BP based on genetic algorithm is applied to the typical daily load forecasting in summer. The demand change of summer load is analysed. Simulation results show the accuracy of the algorithm. In terms of power supply, the reserves of fossil energy are drying up. According to the prediction of authoritative organizations, the world's coal can be mined for 216 years. As a renewable energy, wind power has no carbon emissions compared with traditional fossil energy. At present, it is generally believed that wind energy and solar energy are green power in the full sense, and they are inexhaustible clean power. The model of wind power solar hydrogen hybrid energy system is established. The control strategy of battery power compensation for delayed power of hydrogen production is adopted, and different operation modes are divided. The simulation results show that the system considering the control strategy can well meet the load demand. Battery energy storage system is difficult to respond to short-term peak power fluctuations. Super capacitor is used to suppress it. This paper studies the battery supercapacitor complementary energy storage system and its control strategy. When the line impedance of each generation unit in power grid is not equal, its output reactive power will be affected by the line impedance and distributed unevenly. A droop coefficient selection method of reactive power sharing is proposed. Energy storage device is needed to balance power and maintain DC voltage stability in the DC side of microgrid. Therefore, a new droop control strategy is proposed. By detecting the DC voltage, dynamically translating the droop characteristic curve, adjusting the output power, maintaining the DC voltage in a reasonable range, reducing the capacity of the DC side energy storage device. Photovoltaic grid connected inverter chooses the new droop control strategy.
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Nnabuife, Somtochukwu Godfrey, Kwamena Ato Quainoo, Abdulhammed K. Hamzat, Caleb Kwasi Darko i Cindy Konadu Agyemang. "Innovative Strategies for Combining Solar and Wind Energy with Green Hydrogen Systems". Applied Sciences 14, nr 21 (25.10.2024): 9771. http://dx.doi.org/10.3390/app14219771.
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The integration of wind and solar energy with green hydrogen technologies represents an innovative approach toward achieving sustainable energy solutions. This review examines state-of-the-art strategies for synthesizing renewable energy sources, aimed at improving the efficiency of hydrogen (H2) generation, storage, and utilization. The complementary characteristics of solar and wind energy, where solar power typically peaks during daylight hours while wind energy becomes more accessible at night or during overcast conditions, facilitate more reliable and stable hydrogen production. Quantitatively, hybrid systems can realize a reduction in the levelized cost of hydrogen (LCOH) ranging from EUR 3.5 to EUR 8.9 per kilogram, thereby maximizing the use of renewable resources but also minimizing the overall H2 production and infrastructure costs. Furthermore, advancements such as enhanced electrolysis technologies, with overall efficiencies rising from 6% in 2008 to over 20% in the near future, illustrate significant progress in this domain. The review also addresses operational challenges, including intermittency and scalability, and introduces system topologies that enhance both efficiency and performance. However, it is essential to consider these challenges carefully, because they can significantly impact the overall effectiveness of hydrogen production systems. By providing a comprehensive assessment of these hybrid systems (which are gaining traction), this study highlights their potential to address the increasing global energy demands. However, it also aims to support the transition toward a carbon-neutral future. This potential is significant, because it aligns with both environmental goals and energy requirements. Although challenges remain, the promise of these systems is evident.
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Borges, Rui P., Flávia Franco, Fátima N. Serralha i Isabel Cabrita. "Green Hydrogen Production at the Gigawatt Scale in Portugal: A Technical and Economic Evaluation". Energies 17, nr 7 (29.03.2024): 1638. http://dx.doi.org/10.3390/en17071638.
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The European Union has committed to achieving carbon neutrality by 2050 and green hydrogen has been chosen as a priority vector for reaching that goal. Accordingly, Portugal has drafted a National Hydrogen Strategy laying out the various steps for the development of a green hydrogen economy. One element of this strategy is the development of a gigawatt-scale hydrogen production facility powered by dedicated renewable electricity sources. This work presents an analysis of the technical and economic feasibility of a facility consisting of a gigawatt-scale polymer electrolyte membrane electrolyser powered by solar photovoltaic and wind electricity, using the energy analysis model EnergyPLAN. Different capacities and modes of operation of the electrolyser are considered, including the complementary use of grid electricity as well as different combinations of renewable power, resulting in a total of 72 different configurations. An economic analysis is conducted addressing the related annualised capital expenditures, maintenance, and variable costs, to allow for the determination of the levelised cost of hydrogen for the different configurations. This analysis shows the conditions required for maximising annual hydrogen production at the lowest levelised cost of hydrogen. The best options consist of an electrolyser powered by a combination of solar photovoltaic and wind, with limited exchanges with the electricity grid, and a levelised cost of hydrogen in the range 3.13–3.48 EUR/kg.
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Li, Shilong. "Optimization Planning Method for Power Supply Layout of Multi-Energy Power System". Journal of Physics: Conference Series 2503, nr 1 (1.05.2023): 012025. http://dx.doi.org/10.1088/1742-6596/2503/1/012025.
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Abstract With the continuous expansion of the scale of renewable energy generation and the rapid development of its technology, the forms of power grid become more diverse. Meanwhile, the coupling and uncertainty of various heterogeneous energy resources will significantly change the characteristics and dynamic balance mechanism of the power system. Power generated from renewable energy sources such as wind and light is uncertain and uncontrollable, and such renewable energy enjoys complementary characteristics across time and space. In this paper, we investigate the uncertainty of renewable energy and its complementary space-time characteristics among various power sources and propose to take advantage of the synergistic effects of different forms of energy to realize optimal allocation of resources in a multi-energy power system on a larger scale. Taking the newly built energy base in northwest China as an example, the power distribution of multi-energy power system is optimized through production simulation. Through simulation, it is verified that the method proposed in this paper can improve the efficiency of renewable energy power generation to a certain extent, and has a certain significance for promoting the transformation of energy production and consumption.
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Abdul Baseer, Mohammad, Anas Almunif, Ibrahim Alsaduni i Nazia Tazeen. "Electrical Power Generation Forecasting from Renewable Energy Systems Using Artificial Intelligence Techniques". Energies 16, nr 18 (5.09.2023): 6414. http://dx.doi.org/10.3390/en16186414.
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Renewable energy (RE) sources, such as wind, geothermal, bioenergy, and solar, have gained interest in developed regions. The rapid expansion of the economies in the Middle East requires massive increases in electricity production capacity, and currently fossil fuel reserves meet most of the power station demand. There is a considerable measure of unpredictability surrounding the locations of the concerned regions where RE can be used to generate electricity. This makes forecasting difficult for the investor to estimate future electricity production that could be generated in each area over the course of a specific period. Energy production forecasting with complex time-series data is a challenge. However, artificial neural networks (ANNs) are well suited for handling nonlinearity effectively. This research aims to investigate the various ANN models capable of providing reliable predictions for sustainable sources of power such as wind and solar. In addition to the ANN models, a state-of-the-art ensemble learning approach is used to improve the accuracy of predictions further. The proposed strategies can forecast RE generation accurately over short and long time frames, relying on historical data for precise predictions. This work proposes a new hybrid ensemble framework that strategically combines multiple complementary machine learning (ML) models to improve RE forecasting accuracy. The ensemble learning (EL) methodology outperforms long short-term memory (LSTM), light gradient boosting machine (LightGBM), and sequenced-GRU in predicting wind power (MAE: 0.782, MAPE: 0.702, RMSE: 0.833) and solar power (MAE: 1.082, MAPE: 0.921, RMSE: 1.055). It achieved an impressive R2 value of 0.9821, indicating its superior accuracy.
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Praveen, V., V. Valsala, R. S. Ajayamohan i Sridhar Balasubramanian. "Oceanic Mixing over the Northern Arabian Sea in a Warming Scenario: Tug of War between Wind and Buoyancy Forces". Journal of Physical Oceanography 50, nr 4 (kwiecień 2020): 945–64. http://dx.doi.org/10.1175/jpo-d-19-0173.1.
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AbstractA consensus of the twenty-first-century climate change in the ocean is surface warming, stratification due to extreme freshening and subsequent weakening of mixing, overturning circulation, and biological production. Counterintuitively, certain parts of the tropical ocean may develop a resistance to changes in mixing, where the climate change impacts of atmosphere and ocean are complementary to each other. Under the poleward shift of monsoon low-level jet (LLJ) in the twenty-first century, a part of the northern Arabian Sea has a tendency to maintain the mixed layer depth intact. The process is studied using a set of high-resolution regional ocean model downscaling experiments for the present and future climate. It is found that the wind intensification caused by the shift in LLJ tends to counteract the stratification gained by surface ocean warming and maintains the mixing process in a warming scenario. The mixing energetics shed light on the way in which this is achieved. Intensified winds promote shear production and surface ocean warming demotes buoyancy production of turbulent kinetic energy (TKE), with a net effect of an increase in TKE. However, TKE appears to be dissipating quickly because of the presence of a larger number of small-scale eddies. This causes the mixing length and mixed layer depth to remain intact. Therefore, the interpretations of impacts of future climate change in ocean mixing should be viewed with caution, at least regionally, by focusing on the detailed changes of the governing mechanisms.
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Wang, Weiwei, Yu Qi, Xiaolong Zhang, Pu Xie, Yingjun Guo i Hexu Sun. "Carbon Emission Optimization of the Integrated Energy System in Industrial Parks with Hydrogen Production from Complementary Wind and Solar Systems". Hydrogen 6, nr 1 (31.01.2025): 8. https://doi.org/10.3390/hydrogen6010008.
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With the increasing utilization of renewable energy sources, hydrogen production from complementary wind and solar (HPCWS) systems has become a part of the construction of the integrated energy system (IES). However, renewable energy generation faces uncertainty; in addition, the IES lacks model representation. To solve this problem, this study proposes a carbon day-ahead optimal dispatch model for an integrated energy system with HPCWS and establishes carbon equations for conventional power generation and natural gas. The demand-side response of the IES is considered in conjunction with the objective functions of low-carbon operation and hydrogen storage gain maximization; furthermore, constraints are established to keep the dispatch results of the equipment within reasonable limits. Secondly, the scheduling model requires a faster and more accurate solution algorithm, so an improved particle swarm algorithm is proposed to solve the minimum of the objective function, and the superior convergence speed and accuracy of the algorithm are verified. The comparison of the IES before and after the introduction of HPCWS yields the changes in carbon emission values and hydrogen production before and after the optimization for the respective seasons and scenarios. In addition, the article also discusses the effect of season on the optimization results.
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Feng, Yi, Lei Jun Shao, Bang Ling Zhang, Meng Jie Wu, Yu Pei Shao, Qiang Qiang Liao, Guo Ding Zhou i Bo Sun. "Technical and Economic Analysis on Grid-Connected Wind Farm Based on Hybrid Energy Storage System for Active Distribution Network". Applied Mechanics and Materials 672-674 (październik 2014): 274–79. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.274.
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Active distribution network with energy storage system is an important outlet for a mass of distributed renewable energy connected to the grid. In this context, a hybrid energy storage system is proposed based on NaS battery and lithium ion battery, that the former is the main large scale energy storage technology world-widely used and developed and the latter is a flexible way to have both power and energy capacities. The hybrid energy storage system, which takes advantage of the two complementary technologies to provide large power and energy capacities, is chosen to do an evaluation of economical-environmental based on critical excess electricity production (CEEP), CO2 emission, annual total costs calculated on the specific given condition using Energy PLAN software. The result shows that hybrid storage system has strengths in environmental benefits and also can absorb more discarded wind power than single storage system and is a potential way to push forward the application of wind power and even other types of renewable energy resources.
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Ma, Suliang, Zeqing Meng, Yang Mei, Mingxuan Chen i Yuan Jiang. "A Multi-Optimization Method for Capacity Configuration of Hybrid Electrolyzer in a Stand-Alone Wind-Photovoltaic-Battery System". Applied Sciences 15, nr 6 (13.03.2025): 3135. https://doi.org/10.3390/app15063135.
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The coupling of renewable energy sources with electrolyzers under stand-alone conditions significantly enhances the operational efficiency and improves the cost-effectiveness of electrolyzers as a technologically viable and sustainable solution for green hydrogen production. To address the configuration optimization challenge in hybrid electrolyzer systems integrating alkaline water electrolysis (AWE) and proton exchange membrane electrolysis (PEME), this study proposes an innovative methodology leveraging the morphological analysis of Pareto frontiers to determine the optimal solutions under multi-objective functions including the hydrogen production cost and efficiency. Then, the complementary advantages of AWE and PEME are explored. The proposed methodology demonstrated significant performance improvements compared with the single-objective optimization function. When contrasted with the economic optimization function, the hybrid system achieved a 1.00% reduction in hydrogen production costs while enhancing the utilization efficiency by 21.71%. Conversely, relative to the efficiency-focused optimization function, the proposed method maintained a marginal 5.22% reduction in utilization efficiency while achieving a 6.46% improvement in economic performance. These comparative results empirically validate that the proposed hybrid electrolyzer configuration, through the implementation of the novel optimization framework, successfully establishes an optimal balance between the economy and efficiency of hydrogen production. Additionally, a discussion on the key factors affecting the rated power and mixing ratio of the hybrid electrolyzer in this research topic is provided.
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Nikiforov, A. I., R. S. Khachatryan, M. G. Dolgikh i G. A. Shishanov. "The world’s best practices in the development of aquaculture in the framework of the implementation of projects for the multipurpose use of the infrastructure of the fuel and energy complex". Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), nr 8 (26.08.2023): 502–16. http://dx.doi.org/10.33920/sel-09-2308-01.
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The article discusses the current international experience of integrating various aquaculture projects into the infrastructure of the fuel and energy complex. Against the background of the active growth in the production of aquaculture products, there is a tendency for the multipurpose use of energy sector facilities (oil platforms, wind farms, etc.) to obtain valuable aquaculture products both during their operation and after the completion of the project period of use. The specifics of the production and assortment of aquaculture facilities and farming methods in different regions of the world have been identified, which determined the features of the integration of aquaculture into fuel and energy facilities. The most common and has been used for many decades in many countries of the world is the cultivation of aquaculture facilities on the recycled water of thermal power plants and reservoirs of hydroelectric power plants. In the European region, there is an active use of offshore platforms for the extraction of hydrocarbons with simultaneous agricultural, aquaculture, scientific activities and the production of electricity through the installation of wind and wave turbines. Oxygen and hydrogen production is organized on some platforms. In North America, projects of hybrid systems “food-energy-water” are being developed using aquavoltaics technology, which allows maintaining the aquatic environment in optimal condition. Fish farming is combined with the cultivation of crustaceans and shellfish, oil platforms are often repurposed into artificial reefs. A patented project of an integrated floating system consisting of four vertical-axial wind turbines connected to a single system with a solar battery and a floating base for the placement of aquaculture facilities is being implemented in Asia. The development of such projects, in addition to the pronounced positive economic effect, also contributes to improving the level of food security of the regions. The use of engineering structures and other infrastructure facilities as new locations and substrates for the cultivation and free habitat of various hydrobionts can significantly reduce the negative impact of the fuel and energy industry on the environment.
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McWilliam, Michael K., Thanasis K. Barlas, Helge A. Madsen i Frederik Zahle. "Aero-elastic wind turbine design with active flaps for AEP maximization". Wind Energy Science 3, nr 1 (4.05.2018): 231–41. http://dx.doi.org/10.5194/wes-3-231-2018.
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Abstract. In optimal wind turbine design, there is a compromise between maximizing the energy producing forces and minimizing the absolute peak loads carried by the structures. Active flaps are an attractive strategy because they give engineers greater freedom to vary the aerodynamic forces under any condition. Flaps can be used in a variety of different ways (i.e. reducing fatigue, peak loads), but this article focuses on how quasi-static actuation as a function of mean wind speed can be used for annual energy production (AEP) maximization. Numerical design optimization of the DTU 10 MW reference wind turbine (RWT), with the HAWTOpt2 framework, was used to both find the optimal flap control strategy and the optimal turbine designs. The research shows that active flaps can provide a 1 % gain in AEP for aero-structurally optimized blades in both add-on (i.e. the flap is added after the blade is designed) and integrated (i.e. the blade design and flap angle is optimized together) solutions. The results show that flaps are complementary to passive load alleviation because they provide high-order alleviation, where passive strategies only provide linear alleviation with respect to average wind speed. However, the changing loading from the flaps further complicates the design of torsionally active blades; thus, integrated design methods are needed to design these systems.
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Kaissas, Ioannis, i Nikolaos Nikolaidis. "Analysis and optimization of small modular reactors contribution to the power production of Greece". Nuclear Technology and Radiation Protection 39, nr 3 (2024): 173–84. https://doi.org/10.2298/ntrp2403173k.
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Following the global trend for carbon-free energy production, Greece shut down most of its coal power plants and installed solar and wind systems for electricity production. Due to the time variations in the energy production of these systems, a complementary power source is needed, with the ability to change its output on demand. Small modular reactors combine zero-carbon emissions with the ability to vary the power production on demand. The objective of this study is to examine the energetic competitiveness of five appropriately selected small modular reactors compared to the total power production of coal power plants in Greece. The daily and monthly distribution of generated energy of the previous year (2023) is analyzed to demonstrate the potential operation of small modular reactors in Greece's electrical grid. The outcome addresses whether deploying a small modular reactor is energetically beneficial for Greece and indicates the number of modules required or how many small modular reactors, in combination with renewable sources, can meet the demand. The annual coal power plant production of Greece of 4.5 TWh can be substituted with one multi-module small modular reactor or a combination of them, appropriately located.
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Gowri, K. "DUAL-SOURCES ENERGY HARVESTING SYSTEM". INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, nr 10 (17.10.2024): 1–6. http://dx.doi.org/10.55041/ijsrem37991.
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In this paper innovative integration of wind turbines and solar panels along highways, presenting a multifaceted solution for renewable energy generation, reduced carbon emissions, and sustainable transportation infrastructure. A hybrid renewable energy system combining solar photovoltaic (PV) and wind power optimizes energy production, harnessing the synergies between these two clean sources. By integrating PV panels and wind turbines with advanced power conversion and energy storage, this system mitigates intermittency, ensuring a reliable and efficient DC power supply. Simulation models, leveraging the Single-Diode Model for PV and power coefficient curves for wind, accurately predict performance under varying environmental conditions. The installation of wind turbines and solar panels along highways can harness wind energy, reduce visual impact, and utilize existing infrastructure, while generating electricity for highway lighting, traffic management systems, and electric vehicle charging stations. The hybrid setup enhances overall efficiency, reliability, and power quality. By leveraging complementary seasonal patterns - solar radiation during summer and wind flows during winter - the system ensures a more consistent energy supply. Advanced control strategies and energy storage solutions further improve the system's performance. Case studies demonstrate significant increases in capacity factors and reductions in energy costs. In pioneering projects worldwide demonstrate the feasibility and effectiveness of this integrated approach, highlighting significant reductions in greenhouse gas emissions, energy costs, and reliance on fossil fuels. Technological advancements in turbine design, panel efficiency, and energy storage systems further enhance the potential of this renewable energy solution. This research provides a comprehensive analysis of the benefits, challenges, and future directions for harnessing renewable energy on highways, offering valuable insights for policymakers, engineers, and stakeholders invested in sustainable energy infrastructure development. Keywords: Wind turbine, Solar panels, Energy harvesting, Inverter circuits,etc
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Liao, Feng, i Ying Lu. "Control Technology of Smart Grid Considering Intermittent Power Uncertain Dispatch". Journal of Physics: Conference Series 2530, nr 1 (1.06.2023): 012016. http://dx.doi.org/10.1088/1742-6596/2530/1/012016.
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Abstract The phenomenon of “anti-peak regulation” occurs when large-scale new energy is connected to the grid. The strange phenomenon of wind, light, and water curtailment at low loads occurs in areas with weak power regulation capacity, and the problem of peak regulation of the power system has become increasingly prominent. The typical scenario method is adopted to simplify the description of photovoltaic power generation output and hydropower station runoff. Then, considering the fluctuation of power production and output of the water and photovoltaic complementary system, the short-term multi-objective optimal dispatching model of the water and the photovoltaic complementary system is constructed with the objective of maximizing the average capacity coefficient and power generation load rate of the system on the premise of meeting the corresponding hydropower constraints. Finally, the simulation experimental platform is built. The multi-objective algorithm is used to solve the model. Through the case study, the complementary effect of intermittent power uncertain dispatching is analyzed, and the effectiveness of the model is verified. The dispatching mode can fully guarantee the collaborative optimization decision-making problem of a multi-microgrid with clean power. It can also effectively promote the acceptance level of clean power in the distribution network, and reduce the carbon emission of the distribution network.
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Wang, Fan, Xiang Liao, Na Fang i Zhiqiang Jiang. "Optimal Scheduling of Regional Combined Heat and Power System Based on Improved MFO Algorithm". Energies 15, nr 9 (6.05.2022): 3410. http://dx.doi.org/10.3390/en15093410.
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Due to the inflexibility of cogeneration power plants and the uncertainty of wind power production, the excess power of the distribution network brings challenges to the power grid operation. This paper introduced an improved moth-flame optimization algorithm to meet the challenge of energy complementary dispatching. The proposed algorithm adopts three effective strategies, namely inertia weight, unified initialization, and the spiral position update strategy, which maintains a strong global search ability and a potent compromise between global and local search. The effectiveness of the proposed method was evaluated by benchmark functions. Furthermore, the proposed method was applied to combine heat and power system operation problems and economic dispatch in light load and wind power unpredictability. In order to verify the robustness of the algorithm and solve the complex constraints of power systems under extreme conditions, three different cases had been discussed. The experimental findings indicate that the proposed algorithm shows better performances in terms of convergence speed, ability to escape from a local optimum solution, and population diversity maintenance under different complexity conditions of engineering problems.
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Deepika C. "Hybrid solar-wind energy systems for smart cities: A multi-disciplinary approach". World Journal of Advanced Research and Reviews 3, nr 1 (30.07.2019): 077–86. https://doi.org/10.30574/wjarr.2019.3.1.0130.
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The rapid urbanization and rising energy demand in smart cities require innovative and sustainable power solutions to ensure a stable and efficient energy supply. Hybrid solar-wind energy systems offer a viable approach by leveraging the complementary nature of solar and wind resources to enhance energy reliability and sustainability. This paper presents an in-depth analysis of the integration of solar and wind energy within smart city infrastructures, emphasizing key aspects such as system design, energy management strategies, and real-time optimization techniques enabled by artificial intelligence (AI) and the Internet of Things (IoT). The study explores the technical components of hybrid energy systems, including photovoltaic (PV) panels, wind turbines, power converters, energy storage units, and grid integration mechanisms. Advanced control algorithms and predictive models are examined to optimize energy production, distribution, and consumption, addressing challenges such as intermittency, power fluctuations, and demand-response management. The role of AI-driven forecasting and IoT-based real-time monitoring in improving system efficiency and reliability is highlighted. Furthermore, key challenges associated with hybrid solar-wind systems, including resource variability, infrastructure requirements, grid stability, and economic feasibility, are discussed. Potential solutions such as adaptive energy storage, smart grid integration, and cost-effective deployment strategies are proposed to enhance system resilience and economic viability. A comparative analysis using figures, tables, and bar charts illustrates the performance metrics, cost-benefit analysis, and environmental advantages of hybrid energy systems over conventional power generation methods. This research contributes to the ongoing efforts toward sustainable urban energy solutions by providing insights into the technological advancements and strategic implementations of hybrid solar-wind energy systems. The findings underscore the potential of AI and IoT-driven optimization in enhancing the efficiency, reliability, and scalability of renewable energy solutions for smart cities.
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Djunaedi, Imam, Haifa Wahyu i Sugiyatno. "Architecture and Engineering of Hydrogen Fuel Cell Power Generation Based on Renewable Energy". Key Engineering Materials 708 (wrzesień 2016): 110–17. http://dx.doi.org/10.4028/www.scientific.net/kem.708.110.
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The paper presents an architecture and engineering of hydrogen fuel cell electric power generation system based on renewable energy that already installed in Tenjolaya village, Wanassalam sub-district, Lebak - Banten Province. It also discloses some important information as well as some valuable experiences from the pilot plant operation. The renewable electric power generation system combines wind turbine, photovoltaic, hydrogen electrolysis and fuel cell. The basic design of this system is focused on energy storage in the form of hydrogen gas that can be converted back into electricity by using fuel cell units. The engineering development was done to address the issues on limited energy storage in the battery unit which has several drawbacks i.e. short battery lifetime, limited storage capacity and rigorous and continuous maintenance schedule. To enable remote control and monitoring, a web based monitoring system was developed. From the monitoring system the following information are obtained: the amount of electrical power produced by the wind turbine that was intermittent and depends on time that reached 3000 W; similar pattern is observed from the output power of solar PVs and a maximum point of the solar cell power generation was 640 Watt; the time of electricity production by the wind turbine and the solar cell is complementary to each other in every one day cycle. Two valuable experiences have been gained those are: the location near sea shore has a very corrosive air that damages the wind turbine component, and the use of fuel cell requires high investment cost.
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Giaconia, Alberto, Giampaolo Caputo, Primo Di Ascenzi, Giulia Monteleone i Luca Turchetti. "Demonstration and analysis of a steam reforming process driven with solar heat using molten salts as heat transfer fluid". E3S Web of Conferences 334 (2022): 01004. http://dx.doi.org/10.1051/e3sconf/202233401004.
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Solar reforming of biogas or biomethane represents an example hydrogen production from the combination of renewable sources such as biomass and solar energy. Thanks to its relatively low-cost and flexibility, solar-reforming can represent a complementary source of hydrogen where/when the demand exceeds the green hydrogen availability from water electrolysis powered by PV or wind. Molten salts can be used as heat transfer fluid and heat storage medium in solar-driven steam reforming. The main units of the process have been developed at the pilot scale and experimentally tested in a molten salt experimental loop at ENEA-Casaccia research center: a molten salt heater and a molten salt membrane reformer. After experimental validation, techno-economic studies have been carried out to assess the solar reforming technology on commercial scale and exploitation opportunities have been analysed.
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Taraglio, Sergio, Stefano Chiesa, Saverio De Vito, Marco Paoloni, Gabriele Piantadosi, Andrea Zanela i Girolamo Di Francia. "Robots for the Energy Transition: A Review". Processes 12, nr 9 (14.09.2024): 1982. http://dx.doi.org/10.3390/pr12091982.
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The energy transition relies on an increasingly massive and pervasive use of renewable energy sources, mainly photovoltaic and wind, characterized by an intrinsic degree of production uncertainty, mostly due to meteorological conditions variability that, even if accurately estimated, can hardly be kept under control. Because of this limit, continuously monitoring the operative status of each renewable energy-based power plant becomes relevant in order to timely face any other uncertainty source such as those related to the plant operation and maintenance (O&M), whose effect may become relevant in terms of the levelized cost of energy. In this frame, the use of robots, which incorporate fully automatic platforms capable of monitoring each plant and also allow effective and efficient process operation, can be considered a feasible solution. This paper carries out a review on the use of robots for the O&M of photovoltaic, wind, hydroelectric, and concentrated solar power, including robot applications for controlling power lines, whose role can in fact be considered a key complementary issue within the energy transition. It is shown that various robotic solutions have so far been proposed both by the academy and by industries and that implementing their use should be considered mandatory for the energy transition scenario.
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Gu, Jianwei, Jie Gao, Changsheng Chen, Yibing Liu i Fangliang Zhu. "On the effect of pumped storage on renewable energy accommodation in multi-clean energy complementation bases". Journal of Physics: Conference Series 2932, nr 1 (1.01.2025): 012001. https://doi.org/10.1088/1742-6596/2932/1/012001.
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Abstract Issues on grid-source coordination and grid-integration security and stability severely restricted the level of renewable energy accommodation in muti-energy complementary clean energy bases, which has attracted widespread attention in recent years. As the most technologically well-developed and effective form of large-scale energy storage currently available, pumped storage is an important flexible power source for multi-energy complementary clean energy bases, which could be an effective means to solve the problem of large-scale renewable energy accommodation in the bases. To solve the dilemma of long-distance delivery scale and quantitatively assess the supporting role of pumped storage for clean energy bases, in this paper, typical base development scenarios with pumped storage and different types of renewable energy involved were constructed, and power system production simulation in a full-year with 8, 760 hours was carried out. Besides, a large-scale clean energy base model, including pumped storage with a grid-connected transmission system, was built. Power system safety and stability verification under typical base development scenarios was conducted as well. The results showed that, from the perspective of power balance, pumped storage could drive more than five times its installed capacity of wind or photovoltaic renewable energy development. From the perspective of grid-integration security and stability, the condenser operation of pumped storage could increase the renewable energy accommodation increment by more than 60%. The mechanism of why pumped storage enhanced the level of renewable energy accommodation in the bases was analyzed in this paper. Pumped storage could play a role in energy storage to mitigate the fluctuations in wind and solar power generation. What’s more, the condenser operation of pumped storage can improve the level of grid-connected voltage and reactive power, and increase the short-circuit capacity of the whole multi-clean energy complementation bases. Overall, pumped storage effectively enhanced the delivery and accommodation capacity of clean energy bases. The results of this paper will effectively promote the planning and implementation of multi-energy complementary clean energy bases and help achieve the goal of carbon neutrality.
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Egídio, Andriele, Giulia Dalmolin Vieira, Paulo Henrique Santos, Francini Binotto Missuiura, Lethicia Mann Machado i Bibiana Scaratti Moreira. "Thermal energy in Brazil, production and use". Nature and Conservation 14, nr 2 (1.04.2021): 111–19. http://dx.doi.org/10.6008/cbpc2318-2881.2021.002.0011.
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The human being has become mechanical and unable to supply his or her individual and collective needs through subsistent processes; one would need mechanized means for a large-scale production. The energy production enabled the success and dynamics of the process in the industrial revolution, between the 18th and 19th centuries. With the various options for energy production (coal, water, wind, etc), comes the challenge of environmental awareness in measuring the demand for natural raw materials. The main objective of the article is to analyse information about the operation of thermoelectric plants and the use of products and by-products, such as waste and other important aspects. These aspects include the understanding of thermoelectric energy production processes and its advantages and disadvantages, evaluation of the applications of residues and analysis of the cost-benefit of its acquisition, along with the examination of demand for the types of energy used in Brazil. As a regional reference point in Santa Catarina -Brazil – the Jorge Lacerda Complex was the starting point for this study. The data collected and gauged from this work came exclusively from bibliographical research of students and guidance from third-year teachers, from São José School, city of Itajaí -SC. Here they concluded that biomass, as a renewable source in energy generation is already part of the Brazilian electric matrix representing 8.2%. This value is more than twice the amount used worldwide, but it still symbolizes only a complementary source, which concretely results in less harmful waste production. Thermoelectric energy, although not clean, is a less polluting option - compared to other non-renewable ones - and contains technologies that reduce environmental impacts. Examples include the reuse of water, filters at the top of the chimneys to reduce the emission of pollutants, and the use of ashes for cement production. Thus, this article sought to cohesively structure the production of thermoelectric energy, making it clear how the process and impacts on the social environment occur. Information can transform realities, through research, the future can be transformed.
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Rashid, Amir, Muhammad Ehsan i Javid Rashid. "Design of hybrid power system for COMSATS University Islamabad using homer pro software". International Journal of Engineering, Science and Technology 15, nr 2 (2.06.2023): 14–22. http://dx.doi.org/10.4314/ijest.v15i2.2.
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More than a billion people do not have access o electricity, so it is important to find ways to generate power close to where they live. Hybrid energy systems can be made and used to generate electricity for homes and businesses that are not connected to national or regional power grids. Hybrid energy systems yield greater environmental and economic returns than stand-alone geothermal, solar, wind, or bigenerational systems. The goal of this paper is to simulate a hybrid power system for COMSATS University in Islamabad that is both technically and economically feasible and plays a big part to support clean energy production and safeguard the environment from toxic emissions. This paper provides a case study of COMSATS University Islamabad. The results showed that a hybrid system with a grid and a wind turbine that produced 1 MWh/yr was the best option. This study also provides a cost summary of PV panels, batteries, diesel generators, capital value, replacement, operation and maintenance (OM), fuel cost, and salvage value in dollars. In this study, a hybrid power system is designed that can provide us with a detailed analysis of power generation and consumption for the case study.
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Ramos, Helena M., Brandon Vargas i João Roquette Saldanha. "New Integrated Energy Solution Idealization: Hybrid for Renewable Energy Network (Hy4REN)". Energies 15, nr 11 (26.05.2022): 3921. http://dx.doi.org/10.3390/en15113921.
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A review of different energy components is detailed, as a baseline of fundamentals for the new integrated energy concept idealization. This innovative solution is a Hybrid for Renewable Energy Network (Hy4REN) based on well-studied elements to produce the best final solution. This proposal has the objective of improving energy system sustainability, facing fossil fuel and climate change restrictions, and increasing energy network flexibility. The most mature energy storage technology, pumped hydropower energy storage (PHES), is used to support both the grid connection and stand-alone modes, as an integrated hybrid energy system. The hybrid system idealization is modular and scalable, with a complementary nature among several renewables, using sea water in offshore mode to build an integrated solution. By evaluating a variety of energy sources, complemented with economic analysis, the benefits associated are evidenced using this sustainable methodology based only on renewable sources. Combined production of hydropower, using sea water, with pumped storage and water hammer events to create potential energy to supply hydropower in a water loop cycle, without consuming electrical energy, is explored. Other renewable sources are also integrated, such as floating solar PV energy and an oscillating water column (OWC) with coupled air-venting Wells and wind turbines, all integrated into the Hy4REN device. This complementarity of available sources allows us to improve energy storage flexibility and addresses the energy transition toward net-zero carbon emissions, inducing significant improvements in the sustainability of the energy network as a whole.