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Artykuły w czasopismach na temat "Complementary wind production"
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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.
Rozprawy doktorskie na temat "Complementary wind production"
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Sari, Kheirreddine. "Vers une gestion régionale de l'intermittence éolienne : une approche statistique de la complémentarité de la production". Electronic Thesis or Diss., Université de Montpellier (2022-....), 2024. http://www.theses.fr/2024UMOND020.
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Cette thèse explore le rôle de la complémentarité éolienne dans la gestion de l'intermittence à l'échelle infrarégionale en France. À travers une approche empirique et statistique, ce travail examine la manière dont la distribution géographique des parcs éoliens peut contribuer à atténuer les fluctuations de production dues au caractère variable et volatile du vent, afin de favoriser une couverture plus stable de la demande électrique. La première contribution de cette recherche réside dans l'utilisation de données réelles de vitesse du vent, offrant une meilleure précision par rapport aux données satellitaires et permettant une identification fine des sites complémentaires au sein de la France. En exploitant des méthodes de classification des séries temporelles, cette thèse a permis de déterminer des clusters de sites éoliens négativement corrélés, indiquant un potentiel de complémentarité qui améliore la disponibilité de l'énergie éolienne et réduit les épisodes d'intermittence. Ensuite, l'étude intègre une analyse des contraintes techniques, environnementales et économiques des parcs éoliens, soulignant la faisabilité de cette complémentarité. L'évaluation économique des combinaisons de sites montre que ces configurations sont non seulement viables mais aussi abordables en termes de coût actualisé de l'électricité (LCOE). Les résultats démontrent que les parcs éoliens complémentaires augmentent la couverture de la demande d'au moins 10 % par rapport à un site unique, allant jusqu'à un taux de couverture de 30%. Enfin, l'analyse de séries temporelles est utilisée pour quantifier les effets dynamiques de la complémentarité sur la production et la demande résiduelle, en intégrant des tests de causalité de Granger dépendant du temps (TVGC). Cette approche révèle que la complémentarité spatio-temporelle du vent réduit la demande résiduelle, en particulier lors des périodes de forte demande, comme en hiver, et souligne l'importance d'une prise en compte saisonnière, dans la perspective, d'une planification éolienne efficace. En somme, ce travail de recherche démontre que la complémentarité éolienne infrarégionale, fondée sur une analyse fine des sites et intégrant des données empiriques, peut jouer un rôle stratégique dans la gestion de l'intermittence. Ces résultats apportent un éclairage pertinent pour l'élaboration de politiques énergétiques locales, voire globales, notamment dans le cadre des Zones d'Accélération des Énergies Renouvelables en FranceThis thesis explores the role of wind complementarity in managing intermittency at the sub-regional level in France. Through an empirical and statistical approach, this work examines how the geographical distribution of wind farms can help mitigate production fluctuations due to the variable and volatile nature of wind, thus promoting a more stable coverage of electricity demand. The first contribution of this research lies in the use of real wind speed data, offering greater precision compared to satellite data and enabling a fine-tuned identification of complementary sites within France. By leveraging time series classification methods, this thesis identified clusters of negatively correlated wind sites, indicating a complementarity potential that enhances wind energy availability and reduces intermittency events. The study then incorporates an analysis of the technical, environmental, and economic constraints of wind farms, highlighting the feasibility of this complementarity. The economic evaluation of site combinations shows that these configurations are not only viable but also affordable in terms of the levelized cost of electricity (LCOE). The results demonstrate that complementary wind farms increase demand coverage by at least 10% compared to a single site, reaching up to a 30% coverage rate.Finally, time-series analysis is used to quantify the dynamic effects of complementarity on production and residual demand, integrating time-varying Granger causality tests (TVGC). This approach reveals that the spatio-temporal complementarity of wind reduces residual demand, especially during periods of high demand, such as in winter, and underscores the importance of seasonal consideration in effective wind planning. In summary, this research demonstrates that sub-regional wind complementarity, based on a refined site analysis and empirical data, can play a strategic role in managing intermittency. These findings provide relevant insights for developing local, and potentially global, energy policies, especially within the framework of Renewable Energy Acceleration Zones in France
Części książek na temat "Complementary wind production"
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Nahm, Jonas. "Wind and Solar Invention in the United States". W Collaborative Advantage, 151–83. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197555361.003.0006.
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Chapter six makes the case that a growing divide between an advanced R&D infrastructure and a declining manufacturing sector encouraged US wind and solar firms to pursue invention largely divorced from production. Most firms lacked the production capabilities to commercialize and manufacture their innovation in-house and decided to rely on complementary capabilities of global partners. In the United States, the large public investments in renewable energy research have yielded the smallest industrial footprint of the three cases examined in this book, with considerable political consequences for the kinds of coalitions that emerged behind state support of wind and solar.
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Kumawat, Hitesh, i Raunak Jangid. "Using AI Techniques to Improve the Power Quality of Standalone Hybrid Renewable Energy Systems". W Crafting a Sustainable Future Through Education and Sustainable Development, 219–50. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-9601-5.ch011.
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As a developed and environmentally benign alternative for energy generation, renewable energy sources (RES) have attracted a lot of attention. The issue of energy quality, however, is one of the most difficult integration problems for RES. Voltage and frequency violations caused by waveform instability in the energy production from RES can harm equipment and lower the reliability of the power supply. In recent years, renewable energy sources like wind and solar power have drawn a lot of attention as environmentally friendly substitutes for traditional energy sources. Systems with artificial intelligence (AI) are becoming more and more common for use in automation, automated automation, and data analysis. In this research, the authors present a unique theory for an AI system that combines solar and wind energy to power AI applications. In order to improve the effectiveness and efficiency of AI systems, the suggested system makes use of the complementary properties of solar and wind energy, optimizing their generation and utilization.
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McElroy, Michael B. "Power from the Sun Abundant But Expensive". W Energy and Climate. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780190490331.003.0015.
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As discussed in the preceding chapter, wind resources available from nonforested, nonurban, land-based environments in the United States are more than sufficient to meet present and projected future US demand for electricity. Wind resources are comparably abundant elsewhere. As indicated in Table 10.2, a combination of onshore and offshore wind could accommodate prospective demand for electricity for all of the countries classified as top- 10 emitters of CO2. Solar energy reaching the Earth’s surface averages about 200 W m– 2 (Fig. 4.1). If this power source could be converted to electricity with an efficiency of 20%, as little as 0.1% of the land area of the United States (3% of the area of Arizona) could supply the bulk of US demand for electricity. As discussed later in this chapter, the potential source of power from the sun is significant even for sun- deprived countries such as Germany. Wind and solar energy provide potentially complementary sources of electricity in the sense that when the supply from one is low, there is a good chance that it may be offset by a higher contribution from the other. Winds blow strongest typically at night and in winter. The potential supply of energy from the sun, in contrast, is highest during the day and in summer. The source from the sun is better matched thus than wind to respond to the seasonal pattern of demand for electricity, at least for the United States (as indicated in Fig. 10.5).There are two approaches available to convert energy from the sun to electricity. The first involves using photovoltaic (PV) cells, devices in which absorption of radiation results directly in production of electricity. The second is less direct. It requires solar energy to be captured and deployed first to produce heat, with the heat used subsequently to generate steam, the steam applied then to drive a turbine. The sequence in this case is similar to that used to generate electricity in conventional coal, oil, natural gas, and nuclear- powered systems. The difference is that the energy source is light from the sun rather than a carbon- based fossil fuel or fissionable uranium.
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Shang, Yizi, Xiaofei Li i Ling Shang. "Hydropower Development in China: A Leapfrog Development Secured by Technological Progress of Dam Construction". W Technological Innovations and Advances of Hydropower Engineering [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103902.
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It has been over 110 years since China’s first hydropower station, Shilongba Hydropower Station, was built in 1910. With the support of advanced dam construction technology, the Chinese installed capacity keeps rising rapid growth, hitting around 356 GW nationwide by the end of 2019, and the annual electricity production exceeds 10,000 TWh. At present, China contributes to 25% of global installed hydropower capacity, ranking first in the world for 20 consecutive years since 2001 and surpassing the combined of the 4 countries ranking second to fifth. This paper reviews China’s progress in the context of global hydropower development and examines the role of technological advance in supporting China’s hydropower projects, especially dam construction technology. China is currently actively promoting the “integration of wind, solar, hydro, and coal power generation and energy storage” and building a smart grid of multi-energy complementary power generation. New technologies and new concepts are expected to continue to lead the world’s hydropower development trends.
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Stankovic, Sladjan, Miroslav Kostic, Igor Kostic i Slobodan Krnjajic. "Practical Approaches to Pest Control: The Use of Natural Compounds". W Pests, Weeds and Diseases in Agricultural Crop and Animal Husbandry Production. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.91792.
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Food production is challenged by different factors: climate changes, market competitiveness, food safety, public demands, environmental challenges, new and invasive pests, etc. Intensive food production must be protected against pests, which is nowadays impossible with traditional techniques. The use of eco-friendly biopesticides based on essential oils (EOs), plant extracts (PE), and inert dusts appears to be a complementary or alternative methodology to the conventional chemically synthesized insecticides. The use of such biopesticides reduces the adverse pesticide effects on human health and environment. Biopesticides can exhibit toxic, repellent, and antifeeding effects. Development of bio-insecticides tackles the problem of food safety and residues in fresh food. Innovation within this approach is the combination of several types of active ingredients with complementary effects. Essential oils are well-known compounds with insecticide or repellent activities. New approaches, tools, and products for ecological pest management may substantially decrease pesticide use, especially in fruit and vegetable production. A win-win strategy is to find an appropriate nature-based compound having impact on pests, together with pesticide use, when unavoidable. Toxic or repellent activity could be used for pest control in the field conditions, as well as attractiveness of some compounds for mass trapping, before pests cause significant economic damage.
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Bassetti, Chiara. "Building the Playground for Collective Imagination: Ethnography of a Détournement around Moneywork and Carework". W Ethnographies of Collaborative Economies across Europe: Understanding Sharing and Caring, 149–72. Ubiquity Press, 2022. http://dx.doi.org/10.5334/bct.i.
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The chapter presents a case study of a digital complementary currency – Santacoin (SC) – co-designed, implemented and deployed at a 10-day performing arts festival in Italy. SC allowed participants to create a parallel economy within the blurring boundaries of the festival, in a sort of ‘serious game live’: enacted in the wild, with money and bodies at stake. The case study was conducted through a team ethnography that analysed the engagement of festival attenders, artists and staff with the system and the artistic intervention at its root. Indeed, SC was conceived as the core of a performance co-designed by Macao art collective and a group of local caregivers and wellbeing practitioners who then provided their services in the public space. This was thought of as a radical and experimental performative action for leading people to imagine new forms of social production and reproduction within an alternative world, a ‘citadel’ where finance could be thematized and sociopolitical imaginaries practised. It was a localized experiment in community building and collective imagination around issues of inequality and social re/production. The chapter provides an ethnographic account of the collaborative intervention and its main results. In doing so, it reflects on two main dimensions: the intersection of ‘moneywork’ and caring practices as explicitly thematized in the public space, and the role social interaction, relationships and communities play in collective imagination experimentations.
Streszczenia konferencji na temat "Complementary wind production"
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Liang, Tao, BoFeng Sun, Dabin Mi i Zhijin Sha. "Operation Optimization of Wind-solar Complementary Hydrogen Production System Based on MOGEO". W 2022 7th International Conference on Power and Renewable Energy (ICPRE). IEEE, 2022. http://dx.doi.org/10.1109/icpre55555.2022.9960331.
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Jia, Dong, Hua Li, Yang Li, Hailong Zhang i Tianze Yuan. "Capacity Aptimization Allocation of Hydrogen Production System for Wind-Solar Complementary Power Generation". W 2023 International Conference on Smart Electrical Grid and Renewable Energy (SEGRE). IEEE, 2023. http://dx.doi.org/10.1109/segre58867.2023.00068.
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Adams, Benjamin M., i Thomas H. Kuehn. "The Complementary Nature of CO2-Plume Geothermal (CPG) Energy Production and Electrical Power Demand". W ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88704.
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CO2 Plume Geothermal (CPG) energy generation is a renewable technology that uses CO2 as the geologic working fluid within naturally permeable, sedimentary thermal reservoirs. In this paper, we compare the ability for CPG geothermal technology to meet electrical demand requirements, compared with other renewable technologies, for a 10MW, northern climate town near Minot, North Dakota. Wind and solar are both supply-driven technologies, capturing energy when it is available; However CPG is demand-driven—the rate at which energy is removed from within the earth is chosen to meet electrical demand. Using meteorological data, we compare estimated system performance with actual 2010 electrical load to gage each system’s ability to meet demand. CPG is found to most closely match system demand during the three-season (fall, winter, spring) year, where solar production is inversely related to demand. At the same time, wind does not track demand during any portion of the year, consistently having a large variability. None of these renewable technologies was found to track demand all year. Ultimately we show that CPG may be used to reliably track hourly demand during 95% of the year—an unattainable result for wind and solar.
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Sun, Mengxin, Lin Yang, Yang Liu, Zuoxia Xing, Yeqin Shao i Jinsong Liu. "Optimized control of hydrogen production and energy storage system for wind-solar complementary power generation". W 2022 First International Conference on Cyber-Energy Systems and Intelligent Energy (ICCSIE). IEEE, 2023. http://dx.doi.org/10.1109/iccsie55183.2023.10175247.
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ZAENAL, Mohammed U., Swash Sami Mohammed, Ahmed A. Wahhab i O. J. Abdalgbar. "Complementary Power Supply to compensate the Wind Power in Water Electrolytic System for Hydrogen Production". W 2019 Global Conference for Advancement in Technology (GCAT). IEEE, 2019. http://dx.doi.org/10.1109/gcat47503.2019.8978319.
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Coe, Ryan G., George Lavidas, Giorgio Bacelli, Peter H. Kobos i Vincent S. Neary. "Minimizing Cost in a 100% Renewable Electricity Grid: A Case Study of Wave Energy in California". W ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-80731.
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Abstract Wave energy converters have yet to reach broad market viability. Traditionally, levelized cost of energy has been considered the ultimate stage gate through which wave energy developers must pass in order to find success (i.e., the levelized cost of wave energy must be less than that of solar and wind). However, real world energy decisions are not based solely on levelized cost of energy. In this study, we consider the energy mix in California in the year 2045, upon which the state plans to achieve zero carbon energy production. By considering temporal electricity production and consumption, we are able to perform a more informed analysis of the decision process to address this challenge. The results show that, due to high level of ocean wave energy in the winter months, wave energy provides a valuable complement to solar and wind, which have higher production in the summer. Thus, based on this complementary temporal aspect, wave energy appears cost-effective, even when the cost of installation and maintenance is twice that of solar and wind.
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Schreck, S., i M. Robinson. "Wind Turbine Blade Flow Fields and Prospects for Active Aerodynamic Control". W ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37651.
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As wind turbines continue to grow larger, problems associated with adverse aerodynamic loads will grow more critical. Thus, the wind energy technical community has begun to seriously consider the potential of aerodynamic control methodologies for mitigating adverse aerodynamic loading. Spatial and temporal attributes of the structures and processes present in these flow fields hold important implications for active aerodynamic control methodologies currently being contemplated for wind turbine applications. The current work uses complementary experimental and computational methodologies, to isolate and characterize key attributes of blade flow fields associated with axisymmetric and yawed turbine operation. During axisymmetric operation, a highly three-dimensional, shear layer dominated flow field yields rotational augmentation of both mean and standard deviation levels of aerodynamic forces. Under yawed operating conditions, pseudo-sinusoidal inflow angle oscillations elicit dynamic stall, which significantly intensifies aerodynamic load production. Both rotationally augmented and dynamically stalled flows possess attributes likely to pose central challenges for turbine flow control. Whether active control of turbine aerodynamics can help alleviate adverse aerodynamic loads will depend on comprehension and command of the issues documented herein.
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Jedrzejewski, F. "Entropy and Lyapunov Exponents Relationships in Stochastic Dynamical Systems". W ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-1822.
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Stochastic differential equations and classical techniques related to the Fokker-Planck equation are standard bases for the analysis of nonlinear systems perturbed by noise, such as seismic wave propagation in random media and response of structures to turbulent wind. In this paper, a complementary approach based on entropy production is proposed to analyse the stochastic stability of dynamical systems. For a large class of stochastic dynamical systems, it is shown that the entropy information production is equal to the negative sum of Lyapunov exponents as the noise strength tends to zero. This result is correlated to the topological entropy property, which is in some cases such as the hyperbolic case, equal the sum of Lyapunov exponents. Several examples are given to illustrate the proposed procedure.
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Macadré, Laura-Mae, Keith O’Sullivan, Antoine Breuillard i Stéphane le Diraison. "Risk-Based Approach for the Development of Guidelines and Standards on Combined Marine Renewable Energy Platforms". W ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23812.
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The combination of Marine Renewable Energy (MRE) technologies such as wave or current devices with offshore wind, a more mature technology, could enable pooling of R&D efforts and reducing costs (grid connection, moorings, maintenance activities…). Moreover, the different characteristics of the wind, wave and current resources could be complementary and provide a smoothing effect on the power production. Therefore, the EU FP7 project -MARINA Platform- aims at studying concepts of combined platforms integrating different types of MRE devices. Many challenges are induced by these innovative platforms and guidelines and standards will be required to ensure safety, reliability and quality. However, as the concepts are only at the development stage, no standards have been written for these combined platforms so far. This paper presents a new approach proposed by Bureau Veritas within the scope of the MARINA project for the development of guidelines and standards dedicated to combined MRE platforms. Existing literature on standards about MRE and related sectors, like shipping, wind energy and offshore oil & gas, forms a good basis to be exploited. In addition, risk assessment and qualification of new technology might be considered as a complement to standards to support the design of novel offshore concepts. Therefore, the presented methodology combines the use of existing standards from MRE and related sectors with a risk-based approach for the most innovative and unknown parts of the platform. A global risk assessment is performed in parallel for a whole review of the system.
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Shin, Yong-su, i Jungsoo Lee. "Analysis of Aerodynamic Characteristics of Fan-Type Wheels". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-01-2540.
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<div class="section abstract"><div class="htmlview paragraph">This research addresses the pressing need for reducing vehicle aerodynamic resistance, with a specific focus on mitigating wheel and tire resistance, which constitutes approximately 25% of the overall vehicle drag. While the prevailing method for reducing resistance in mass production development involves wheel opening reduction, it inadvertently increases wheel weight and has adverse effects on brake cooling performance. To overcome these challenges, novel complementary resistance reduction methods that can be employed in conjunction with an appropriate degree of wheel opening reduction are imperative. In this study, we introduce symmetrical wheels with a fan-like shape as a solution. The fan configuration influences the surrounding flow by either drawing it in or pushing it out, depending on the direction of rotation. Application of these fan-type wheels to a vehicle's wheels results in the redirection of flow inwards or outwards during high-speed driving due to wheel rotation. This, in turn, impacts the vehicle's rear wake deformation and, consequently, induces alterations in vehicle aerodynamic performance. The study begins by introducing the designs of fan-type wheel covers that can be mounted on the base rim. We evaluate the ventilation (suction-blowing) performance of these wheels and their impact on the vehicle's aerodynamic performance through wind tunnel tests. Detailed numerical analysis of the flow field within the wheel cover and around the vehicle, resulting from the rotation of these fan-type wheels, is carried out using Computational Fluid Dynamics (CFD) simulations. These simulations utilize the Moving Reference Frame (MRF) method to simulate wheel rotation.</div></div>
Raporty organizacyjne na temat "Complementary wind production"
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Bar-Joseph, Moshe, William O. Dawson i Munir Mawassi. Role of Defective RNAs in Citrus Tristeza Virus Diseases. United States Department of Agriculture, wrzesień 2000. http://dx.doi.org/10.32747/2000.7575279.bard.
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This program focused on citrus tristeza virus (CTV), the largest and one of the most complex RNA-plant-viruses. The economic importance of this virus to the US and Israeli citrus industries, its uniqueness among RNA viruses and the possibility to tame the virus and eventually turn it into a useful tool for the protection and genetic improvement of citrus trees justify these continued efforts. Although the overall goal of this project was to study the role(s) of CTV associated defective (d)-RNAs in CTV-induced diseases, considerable research efforts had to be devoted to the engineering of the helper virus which provides the machinery to allow dRNA replication. Considerable progress was made through three main lines of complementary studies. For the first time, the generation of an engineered CTV genetic system that is capable of infecting citrus plants with in vitro modified virus was achieved. Considering that this RNA virus consists of a 20 kb genome, much larger than any other previously developed similar genetic system, completing this goal was an extremely difficult task that was accomplished by the effective collaboration and complementarity of both partners. Other full-length genomic CTV isolates were sequenced and populations examined, resulting in a new level of understanding of population complexities and dynamics in the US and Israel. In addition, this project has now considerably advanced our understanding and ability to manipulate dRNAs, a new class of genetic elements of closteroviruses, which were first found in the Israeli VT isolate and later shown to be omnipresent in CTV populations. We have characterized additional natural dRNAs and have shown that production of subgenomic mRNAs can be involved in the generation of dRNAs. We have molecularly cloned natural dRNAs and directly inoculated citrus plants with 35S-cDNA constructs and have shown that specific dRNAs are correlated with specific disease symptoms. Systems to examine dRNA replication in protoplasts were developed and the requirements for dRNA replication were defined. Several artificial dRNAs that replicate efficiently with a helper virus were created from infectious full-genomic cDNAs. Elements that allow the specific replication of dRNAs by heterologous helper viruses also were defined. The T36-derived dRNAs were replicated efficiently by a range of different wild CTV isolates and hybrid dRNAs with heterologous termini are efficiently replicated with T36 as helper. In addition we found: 1) All CTV genes except of the p6 gene product from the conserved signature block of the Closteroviridae are obligate for assembly, infectivity, and serial protoplast passage; 2) The p20 protein is a major component of the amorphous inclusion bodies of infected cells; and 3) Novel 5'-Co-terminal RNAs in CTV infected cells were characterized. These results have considerably advanced our basic understanding of the molecular biology of CTV and CTV-dRNAs and form the platform for the future manipulation of this complicated virus. As a result of these developments, the way is now open to turn constructs of this viral plant pathogen into new tools for protecting citrus against severe CTV terms and development of virus-based expression vectors for other citrus improvement needs. In conclusion, this research program has accomplished two main interconnected missions, the collection of basic information on the molecular and biological characteristics of the virus and its associated dRNAs toward development of management strategies against severe diseases caused by the virus and building of novel research tools to improve citrus varieties. Reaching these goals will allow us to advance this project to a new phase of turning the virus from a pathogen to an ally.