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Journal articles on the topic 'Useful energy utilization ratio'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

GARG, H. P., and A. KRISHNAN. "Solar energy utilization potential in Jodhpur and New Delhi." MAUSAM 25, no. 3 (2022): 473–78. http://dx.doi.org/10.54302/mausam.v25i3.5259.

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Average useful solar energies available for utilisation in respect of flat-plate collector kept at optimum tilts in respect of Jodhpur and Delhi were worked out for typical winter and summer months. Based on these average energies generalised design curves for water heating by flat-plate collectors giving the ratio of useful energy collected by the flat- plate collector to the heat removal efficiency factor in terms of inlet temperature rise over ambient temperature have been prepared. Such design curves based on 90 per cent, 50 per cent and 10 per cent exceedance values of useful energies hav

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Grujic, Marija, and Jasna Kavran. "Daylight utilisation potentials of highly glazed individual office spaces in Belgrade climate condition." Thermal Science 22, Suppl. 4 (2018): 1105–16. http://dx.doi.org/10.2298/tsci170531224g.

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Office buildings have high standards for lighting requirements, which greatly contribute to high lighting energy consumption. Daylight utilization is one of the means to reduce it. The goal of this paper is to evaluate daylight utilization potentials in Belgrade climate in order to generate initial design guideline for highly glazed small, individual office spaces. Daylight availability and its lighting energy implications are analyzed using computer simulation tool DIVA for Rhino. Selected individual office space is modelled as a narrow rectangular space, sidelit and highly glazed. Parametric

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Sutikno, Juwari Purwo, Serlya Aldina, Novita Sari, and Renanto Handogo. "Utilization of Solar Energy for Air Conditioning System." MATEC Web of Conferences 156 (2018): 03040. http://dx.doi.org/10.1051/matecconf/201815603040.

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The purposes of this research are to do a system simulation of air conditioning utilizing solar energy with single effect absorption refrigeration method, analyze the coefficient of performance (COP) for each absorbent-refrigerant variable and compare the effectivity of every absorbent-refrigerant variable used. COP is a constant that denotes the effeciency of a refrigeration system, that is ratio of work or useful output to the amount of work or energy input. The higher the number of COP, the more efficient the system is. Absorbent-refrigerant (working fluids) variables used in this research

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Huang, Guo Qin, and Xi Peng Xu. "Analysis of Energy Consumption Efficiency in Diamond Circular Sawing." Solid State Phenomena 175 (June 2011): 67–71. http://dx.doi.org/10.4028/www.scientific.net/ssp.175.67.

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. Experiments of sawing granite with diamond circular blades were carried out to study the energy efficiency in circular sawing. Energy consumed by machine spindle is classified into energy used without cutting and energy used with cutting. The energy used without cutting almost increases with the improvement of peripheral speed of blade. The energy consumption coefficient, the ratio of energy used with cutting to total energy consumed by spindle, increases with the increase of material removed rate, which reveals that higher material removed rate is favor for improving energy utilization. A f

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Jiang, Yongzhong, Valerii Havrysh, Oleksandr Klymchuk, Vitalii Nitsenko, Tomas Balezentis, and Dalia Streimikiene. "Utilization of Crop Residue for Power Generation: The Case of Ukraine." Sustainability 11, no. 24 (2019): 7004. http://dx.doi.org/10.3390/su11247004.

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Renewable energy is expected to play a significant role in power generation. The European Union, the USA, China, and others, are striving to limit the use of energy crop for energy production and to increase the use of crop residue both on the field and for energy generation processes. Therefore, crop residue may become a major energy source, with Ukraine following this course. Currently in Ukraine, renewable power generation does not exceed 10% of total electricity production. Despite a highly developed agriculture sector, there are only a small number of biomass power plants which burn crop

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Mardawiyah Daryanto, Wiwiek, and Sudarmawan Samidi. "Measuring the Financial Performance of Enterprises Under Ministry of Energy and Mineral Resources (EMR) an Indonesia Experience." International Journal of Engineering & Technology 7, no. 3.21 (2018): 16. http://dx.doi.org/10.14419/ijet.v7i3.21.17086.

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The assessment of financial performance is becoming increasingly important. The Decree No. KEP-100/MBU/2002 issued by Ministry of Stated Owned Enterprises of Indonesia on June 2002 provide the mandatory measuring and rating the financial health condition for all subsidiaries of SOEs. The circumstance is of relevance in the Indonesian context, characterized by a strong corporate governance but the lack of transparency. This study aims to measure the level of financial performance by investigating return on equity, return on investment, cash ratio, current ratio, collection period, inventory tur

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Pan, Yadi, Shuya Shan, Yao Wei, et al. "Study on the fiber fouling in drying exhaust heat utilization of wood industry." E3S Web of Conferences 38 (2018): 01003. http://dx.doi.org/10.1051/e3sconf/20183801003.

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Based on the viscoelastic and creep deformation properties, a new deposition mechanism model for slender wood fiber particles in wast heat utilization is proposed in this paper. And the equivalent sphere method is used to describe the particle feature size in the model. With the proposed deposition model of flexible slender particles, the critical criteria are obtained. The influence of particle size, aspect ratio and damping factor on particle deposition has been investigated. The results indicate that particle deposition increases with the particle size decrease, aspect ratio and damping fac

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Jankowski, Marcin, and Aleksandra Borsukiewicz. "A Novel Exergy Indicator for Maximizing Energy Utilization in Low-Temperature ORC." Energies 13, no. 7 (2020): 1598. http://dx.doi.org/10.3390/en13071598.

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In the last decade, particular attention has been paid to the organic Rankine cycle (ORC) power plant, a technology that implements a classical steam Rankine cycle using low-boiling fluid of organic origin. Depending on the specific application and the choice of the designer, the ORC can be optimized using one or several criteria. The selected objectives reflect various system performance aspects, such as: thermodynamic, economic, environmental or other. In this study, a novel criterion called exergy utilization index (XUI) is defined and used to maximize the utilization of an energy source in

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Zhong, Luyang, Dan Wu, Bo Zhang, et al. "Study on the Impact of Design Parameters of Photovoltaic Combined Vacuum Glazing (PVCVG) on the Energy Consumption of Buildings in Lhasa." Buildings 15, no. 4 (2025): 649. https://doi.org/10.3390/buildings15040649.

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The synergistic active-passive utilization of solar energy in buildings plays an important role in achieving nearly zero-energy buildings. Building-integrated photovoltaic (BIPV) is a crucial initiative to reduce heating energy consumption, especially in cold climate zones with abundant solar radiation. However, few studies have examined the impact of design parameters of photovoltaic combined vacuum glazing (PVCVG) on building energy efficiency in Lhasa. This study assessed the energy performance of several typical windows and PVCVG with various Window-to-Wall Ratio (WWR) design conditions an

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Huang, F. F. "Performance Evaluation of Selected Combustion Gas Turbine Cogeneration Systems Based on First and Second-Law Analysis." Journal of Engineering for Gas Turbines and Power 112, no. 1 (1990): 117–21. http://dx.doi.org/10.1115/1.2906465.

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The thermodynamic performance of selected combustion gas turbine cogeneration systems has been studied based on first-law as well as second-law analysis. The effects of the pinch point used in the design of the heat recovery steam generator, and pressure of process steam on fuel-utilization efficiency (first-law efficiency), power-to-heat ratio, and second-law efficiency, are examined. Results for three systems using state-of-the-art industrial gas turbines show clearly that performance evaluation based on first-law efficiency alone is inadequate. Decision makers should find the methodology co

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Wang, Victor Bochuan, Joey Kuok Hoong Yam, Song-Lin Chua, et al. "Synergistic Microbial Consortium for Bioenergy Generation from Complex Natural Energy Sources." Scientific World Journal 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/139653.

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Microbial species have evolved diverse mechanisms for utilization of complex carbon sources. Proper combination of targeted species can affect bioenergy production from natural waste products. Here, we established a stable microbial consortium withEscherichia coliandShewanella oneidensisin microbial fuel cells (MFCs) to produce bioenergy from an abundant natural energy source, in the form of the sarcocarp harvested from coconuts. This component is mostly discarded as waste. However, through its usage as a feedstock for MFCs to produce useful energy in this study, the sarcocarp can be utilized

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Wang, Kun, Guoli Feng, Lizhong Zhang, and Jia Wu. "Energy Transmission and Equilibrium Scheme in Data Communication Opportunistic Networks." Applied System Innovation 3, no. 4 (2020): 54. http://dx.doi.org/10.3390/asi3040054.

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In data communication, a good communication scheme can improve the transmission of data packets among nodes. The opportunistic network is a convenient wireless communication network and its model is easily applied in data communication. Energy consumption among nodes in the opportunistic network is an important parameter. The over-consumption of energy may cause the nodes to be dead, and then many useful data packets would be lost. Especially in data communication, this tendency is obvious. However, many researchers rarely consider energy consumption in the opportunistic network. This paper su

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Tohir, Abdul Rochman, Mochamad Solikin, and Herry Purnama. "TINJAUAN KUAT TEKAN DAN KANDUNGAN B3 TERLARUT DALAM BETON DENGAN AGREGAT BUATAN BERBAHAN DASAR BOTTOM ASH BATU BARA." Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil 29, no. 1 (2024): 21–33. https://doi.org/10.32497/wahanats.v29i1.5646.

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Coal is an efficient fuel with stable heat production, so many industries use it as an energy source for the production and generation of electrical energy. Burning coal produces bottom ash waste in the combustion furnace and is categorized as B3 waste according to Government Regulation number 22 of 2021. This research is to create an alternative utilization and processing of coal bottom ash waste that is useful but still safe for the environment, namely by utilizing coal bottom ash in a ratio of 10% to 60% to sand plus cement as a binding material to form artificial aggregates, artificial agg

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HUA, K., S. BIRKETT, C. F. M. DE LANGE, and D. P. BUREAU. "Adaptation of a non-ruminant nutrient-based growth model to rainbow trout (Oncorhynchus mykiss Walbaum)." Journal of Agricultural Science 148, no. 1 (2009): 17–29. http://dx.doi.org/10.1017/s0021859609990037.

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SUMMARYModels that accurately describe and predict growth and nutrient utilization of fish can be useful in developing strategies to improve the economic and environmental sustainability of aquaculture operations. Current bioenergetics models are not sufficiently flexible to be applied to the wide range of conditions encountered in aquaculture. There is a need to move from bioenergetics approaches to more mechanistic approaches based on nutrient utilization by fish. A non-ruminant nutrient-based growth model has been successfully used in pig production. The model explicitly describes the utili

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Wu, Zhi Qiang, Shu Zhong Wang, Qi Xing Guo, Jun Zhao, Lin Chen, and Hai Yu Meng. "A Kinetic Study of Co-Pyrolysis of Coal and Spent Mushroom Compost (SMC)." Advanced Materials Research 781-784 (September 2013): 2406–10. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2406.

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Co-utilization of coal and biomass has been shown as an effective way to reduce the carbon footprint. Pyrolysis technology not only transform carbonaceous materials such as coal and biomass into various chemical compounds and fuels, but also as the initial step of the thermochemical conversation. For the sake of a better understanding of the co-thermal conversation, it is very necessary to get a intensive study on the co-pyrolysis of coal and biomass. In this paper the co-pyrolysis characteristics of coal and spent mushroom compost (SMC) were investigated through an thermogravimetry analyzer f

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Adeyi, Abiola John. "Drying Process of Senna alata Medicinal Leave: Comparative Empirical and Artificial Neural Networks Modelling of Mass Transfer Kinetics with Energy Analysis." ABUAD Journal of Engineering Research and Development (AJERD) 7, no. 2 (2024): 139–51. http://dx.doi.org/10.53982/ajerd.2024.0702.14-j.

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This study investigated the microwave drying of Senna alata leaves (SAL) for sustainable utilization. The effect of SAL form (un-chopped and chopped) and microwave power (200, 400 and 600 W) on the drying characteristics and energy utilization with comparative semi-empirical and artificial neural network (ANN) modelling was investigated. SAL was dried at the selected drying factors (leaf form and microwave power); and moisture transport characteristics including moisture content, moisture ratio, effective moisture diffusivity, activation energy, energy consumption, specific energy consumption

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He, Zhipeng, and Yizhi Tian. "Design and Analysis of Comprehensive Solar Utilization System Based on Photovoltaic Concentration and Spectral Splitting." Processes 11, no. 7 (2023): 1944. http://dx.doi.org/10.3390/pr11071944.

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In order to address the issue of a solar utilization system with low efficiency, this paper designs a new solar conversion system based on photovoltaic concentration and spectral splitting. The system concentrates sunlight through a Fresnel lens and uses a hollow concave cavity to evenly distribute the incident energy flow. The spectral splitting medium separates the useful irradiance for the PV cell from those wavelengths that are more suited to heat generation. By considering the available wavelength of photovoltaic cells, the GaAs cell and a ZnO nanofluid were selected for this paper. It wa

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Priyanka H. and Mary Cherian. "Effective Utilization of Resources Through Optimal Allocation and Opportunistic Migration of Virtual Machines in Cloud Environment." International Journal of Cloud Applications and Computing 11, no. 3 (2021): 72–91. http://dx.doi.org/10.4018/ijcac.2021070105.

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Cloud computing has become more prominent, and it is used in large data centers. Distribution of well-organized resources (bandwidth, CPU, and memory) is the major problem in the data centers. The genetically enhanced shuffling frog leaping algorithm (GESFLA) framework is proposed to select the optimal virtual machines to schedule the tasks and allocate them in physical machines (PMs). The proposed GESFLA-based resource allocation technique is useful in minimizing the wastage of resource usage and also minimizes the power consumption of the data center. The proposed GESFL algorithm is compared

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Wu, Qinghua, Yue Fan, and Xiao Wang. "Improvement in Operation Efficiency of Shallow Geothermal Energy System—A Case Study in Shandong Province, China." Water 15, no. 7 (2023): 1409. http://dx.doi.org/10.3390/w15071409.

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Shallow geothermal energy (SGE) is a renewable energy source that has the advantage of being low-cost, clean, and locally sourced compared to fossil fuels, and is thus significant for China to achieve its future goals of carbon peaking and carbon neutrality. However, determining how to improve the operational efficiency of SGE systems is a key factor in the sustainable development and utilization of geothermal energy. This study examined the long-term operational efficiency of SGE systems and applied numerical simulation methods of hydro-thermal coupling to a SGE utilization project in Shandon

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Sherman, Y., P. Lipsky, M. Bramwit, and N. Schlesinger. "AB0934 DUAL-ENERGY COMPUTED TOMOGRAPHY IN GOUT PATIENTS: IS IT USEFUL IN GENERAL PRACTICE?" Annals of the Rheumatic Diseases 79, Suppl 1 (2020): 1767.2–1767. http://dx.doi.org/10.1136/annrheumdis-2020-eular.3833.

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Background:Dual-Energy CT (DECT) has high sensitivity and specificity for detecting monosodium urate (MSU) crystal deposition. Although widely used in research, few studies have evaluated the usefulness of DECT in clinical practice.Objectives:To evaluate the use of DECT in a clinical setting and determine its utilityMethods:We retrospectively evaluated the records of all patients referred for DECT scans over a 6.5-year period. Patient charts were reviewed for clinical features.Results:113 patients (17.5/yr) received DECT evaluation at a university hospital over the study period (234 scans). Al

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Zhang, Peng, Kan Wang, and Ganglin Yu. "A Simplified Supercritical Fast Reactor with Thorium Fuel." Science and Technology of Nuclear Installations 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/405654.

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Super-Critical water-cooled Fast Reactor (SCFR) is a feasible option for the Gen-IV SCWR designs, in which much less moderator and thus coolant are needed for transferring the fission heat from the core compared with the traditional LWRs. The fast spectrum of SCFR is useful for fuel breeding and thorium utilization, which is then beneficial for enhancing the sustainability of the nuclear fuel cycle. A SCFR core is constructed in this work, with the aim of simplifying the mechanical structure and keeping negative coolant void reactivity during the whole core life. A core burnup simulation schem

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Luo, Longfu, Xiaofeng Zhang, Dongran Song, et al. "Optimal Design of Rated Wind Speed and Rotor Radius to Minimizing the Cost of Energy for Offshore Wind Turbines." Energies 11, no. 10 (2018): 2728. http://dx.doi.org/10.3390/en11102728.

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As onshore wind energy has depleted, the utilization of offshore wind energy has gradually played an important role in globally meeting growing green energy demands. However, the cost of energy (COE) for offshore wind energy is very high compared to the onshore one. To minimize the COE, implementing optimal design of offshore turbines is an effective way, but the relevant studies are lacking. This study proposes a method to minimize the COE of offshore wind turbines, in which two design parameters, including the rated wind speed and rotor radius are optimally designed. Through this study, the

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Biszczanik, Aleksandra, Jan Górecki, Mateusz Kukla, Krzysztof Wałęsa, and Dominik Wojtkowiak. "Experimental Investigation on the Effect of Dry Ice Compression on the Poisson Ratio." Materials 15, no. 4 (2022): 1555. http://dx.doi.org/10.3390/ma15041555.

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In the processing of waste materials, attention must be given to the efficient use of energy. The pelletization of dry ice is a good example of such processes. A literature review shows that in the pelletizers available on the market, the force applied in the process is excessive. As a result, the efficiency of the utilization of inputs, including electricity and carbon dioxide, is at a very low level. This article presents the results of experimental research on the effect of the degree of dry ice compression on the value of the Poisson ratio. The first part of this article presents the resea

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Kumar, Vivek V., and Dilip A. Shah. "Application of Tubercles in Wind Turbine Blades: A Review." Applied Mechanics and Materials 867 (July 2017): 254–60. http://dx.doi.org/10.4028/www.scientific.net/amm.867.254.

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Due to the rapid depletion of conventional energy resources like fossil fuels and their harmful effects on the environment, there is an urgent need to seek alternative and sustainable energy sources. Wind energy is considered as one of the efficient source of energy which can be converted to useful form of energy like electrical energy. Though the field of wind engineering has developed in the recent era there is still scope for improvement in the effective utilization of energy. Energy efficiency in wind turbine is largely determined by the aerodynamics of the turbine blades and the character

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Koul, Parankush, Mahesh K. Varpe, Pritam Bhat, Aniket Mishra, Chirag Malhotra, and Devang Kalra. "Effects of Leading-edge Tubercles on the Aerodynamic Performance of Rectangular Blades for low-speed Wind Turbine Applications." International Journal of Scientific Research in Modern Science and Technology 4, no. 1 (2025): 01–28. https://doi.org/10.59828/ijsrmst.v4i1.278.

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The rapid depletion of conventional energy resources like fossil fuels has harmed the environment. Hence, there is an urgent need to seek alternative and sustainable energy sources. Wind energy is considered one of the efficient sources of energy that can be converted to a useful form of electrical energy. Though the field of wind engineering has developed in recent years there is still scope for improvement in the effective utilization of energy. The turbine blades' aerodynamics and the turbulent fluid flow characteristics largely determine the wind turbine's energy efficiency. Hence, in the

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Centner, Franz-Simon, Jochen J. Schoettler, Kathrin Brohm, et al. "S-Adenosylhomocysteine Is a Useful Metabolic Factor in the Early Prediction of Septic Disease Progression and Death in Critically Ill Patients: A Prospective Cohort Study." International Journal of Molecular Sciences 24, no. 16 (2023): 12600. http://dx.doi.org/10.3390/ijms241612600.

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A common final pathway of pathogenetic mechanisms in septic organ dysfunction and death is a lack or non-utilization of oxygen. Plasma concentrations of lactate serve as surrogates for the oxygen-deficiency-induced imbalance between energy supply and demand. As S-adenosylhomocysteine (SAH) was shown to reflect tissue hypoxia, we compared the ability of SAH versus lactate to predict the progression of inflammatory and septic disease to septic organ dysfunction and death. Using univariate and multiple logistic regression, we found that SAH but not lactate, taken upon patients’ inclusion in the s

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Hwang, Sang-Ho, Kyung-Min Kim, Sungho Kim, and Jong Wook Kwak. "Lossless Data Compression for Time-Series Sensor Data Based on Dynamic Bit Packing." Sensors 23, no. 20 (2023): 8575. http://dx.doi.org/10.3390/s23208575.

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In this paper, we propose a bit depth compression (BDC) technique, which performs bit packing by dynamically determining the pack size based on the pattern of the bit depth level of the sensor data, thereby maximally reducing the space wastage that may occur during the bit packing process. The proposed technique can dynamically perform bit packing according to the data’s characteristics, which may have many outliers or several multidimensional variations, and therefore has a high compression ratio. Furthermore, the proposed method is a lossless compression technique, which is especially useful

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Li, Debo, Ning Zhao, Yongxin Feng, and Zhiwen Xie. "Thermogravimetric Analysis of Coal Semi-Char Co-Firing with Straw in O2/CO2 Mixtures." Processes 9, no. 8 (2021): 1421. http://dx.doi.org/10.3390/pr9081421.

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For coal semi-char as a by-produced of low-temperature pyrolysis, combustion for power generation is one of the effective utilization methods to realize its clean and efficient utilization. However, the coal semi-char combustion process has a difficult ignition, unstable combustion and low burnout rate. The co-firing of the semi-char with biomass under oxy-fuel conditions can improve the combustion behavior and reduce fossil CO2 emissions. In this paper, the combustion behavior of Shenhua coal semi-char (SHC) co-firing with straw (ST) in O2/CO2 mixture is investigated using thermogravimetric a

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Jo, Hearin, Jeonghun Oh, Yong Lee, and Myung-Hyun Ryou. "Effect of Varying the Ratio of Carbon Black to Vapor-Grown Carbon Fibers in the Separator on the Performance of Li–S Batteries." Nanomaterials 9, no. 3 (2019): 436. http://dx.doi.org/10.3390/nano9030436.

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Lithium–sulfur (Li–S) batteries are expected to be very useful for next-generation transportation and grid storage because of their high energy density and low cost. However, their low active material utilization and poor cycle life limit their practical application. The use of a carbon-coated separator in these batteries serves to inhibit the migration of the lithium polysulfide intermediate and increases the recyclability. We report the extent to which the electrochemical performance of Li–S battery systems depends on the characteristics of the carbon coating of the separator. Carbon-coated

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Lai, Yin-Hua, Ming-Yi Peng, Rong-Yu Rao, et al. "An Integrated Analysis of Metabolome, Transcriptome, and Physiology Revealed the Molecular and Physiological Response of Citrus sinensis Roots to Prolonged Nitrogen Deficiency." Plants 12, no. 14 (2023): 2680. http://dx.doi.org/10.3390/plants12142680.

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Citrus sinensis seedlings were supplied with a nutrient solution containing 15 (control) or 0 (nitrogen (N) deficiency) mM N for 10 weeks. Extensive metabolic and gene reprogramming occurred in 0 mM N-treated roots (RN0) to cope with N deficiency, including: (a) enhancing the ability to keep phosphate homeostasis by elevating the abundances of metabolites containing phosphorus and the compartmentation of phosphate in plastids, and/or downregulating low-phosphate-inducible genes; (b) improving the ability to keep N homeostasis by lowering the levels of metabolites containing N but not phosphoru

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Singh, Rohit K., Bhavin Soni, Urvish Patel, Asim K. Joshi, and Sanjay K. S. Patel. "Boosted Bio-Oil Production and Sustainable Energy Resource Recovery Through Optimizing Oxidative Pyrolysis of Banana Waste." Fuels 6, no. 1 (2025): 3. https://doi.org/10.3390/fuels6010003.

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The increasing need for sustainable waste management and abundant availability of banana tree waste, a byproduct of widespread banana cultivation, have driven interest in biomass conversion through clean fuels. This study investigates the oxidative pyrolysis of banana tree waste to optimize process parameters and enhance bio-oil production. Experiments were conducted using a fluidized bed reactor at temperatures ranging from 450 °C to 550 °C, with oxygen to biomass (O/B) ratios varying from 0.05 to 0.30. The process efficiently converts this low-cost, renewable biomass into valuable products a

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Ziganshin, Sh G., A. R. Zagretdinov, and Yu V. Vankov. "Energy-saving measures for the operation of industrial furnaces at a gas processing plant." Power engineering: research, equipment, technology 26, no. 3 (2024): 108–19. http://dx.doi.org/10.30724/1998-9903-2024-26-3-108-119.

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THE RELEVANCE. The gas processing industry is quite energy intensive and requires significant energy costs to carry out its activities. Finding ways to improve the energy efficiency of enterprises in this industry is a necessary and urgent task. THE PURPOSE. Identification of opportunities to improve the energy efficiency of the operation of existing industrial furnaces of a gas processing enterprise with the development of energy-saving measures.METHODS. To achieve this goal, a study of existing industrial furnaces of a gas processing enterprise was conducted for the possibility of useful use

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Kronberg, Alexander, Maxim Glushenkov, Sander Roosjen, and Sascha Kersten. "Isobaric Expansion Engine Compressors: Thermodynamic Analysis of the Simplest Direct Vapor-Driven Compressors." Energies 15, no. 14 (2022): 5028. http://dx.doi.org/10.3390/en15145028.

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Isobaric expansion (IE) technology is a promising solution for mini- and medium-scale low-grade heat utilization. IE engines directly convert heat to mechanical energy and are particularly interesting as direct-acting, vapor-driven pumps and compressors. The elimination of multiple energy transformations, technical simplicity and the ability to use widely available low-grade heat (<100 °C) instead of fossil fuels are attractive features of this technology. The purpose of this paper was to present a new compression technology based on IE Worthington type engines, analyze the process analytic

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Metcalf, Steven, Ángeles Rivero-Pacho, and Robert Critoph. "Design and Large Temperature Jump Testing of a Modular Finned-Tube Carbon–Ammonia Adsorption Generator for Gas-Fired Heat Pumps." Energies 14, no. 11 (2021): 3332. http://dx.doi.org/10.3390/en14113332.

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Gas-fired heat pumps are a potential replacement for condensing boilers, utilizing fossil-fuel resources more efficiently and reducing the amount of biogas or hydrogen required in sustainable gas grids. However, their adoption has been limited due to their large size and high capital cost, resulting in long payback times. For adsorption-based heat pumps, the major development challenge is to maximize the rate of heat transfer to the adsorbent, whilst minimizing the thermal mass. This work develops a modular finned-tube carbon–ammonia adsorption generator that incorporates the adsorbent in high

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Sharma, Vidhi. "Use of Waste Ceramic as Aggregate in Concrete." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (2022): 641–46. http://dx.doi.org/10.22214/ijraset.2022.39883.

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Abstract: This research paper represents the experimental study on use of ceramic waste material as an aggregate in concrete. To reach the goal of sustainable development utilization of waste materials in concrete production is very much useful. The ceramic aggregate used in this study was recycled from industrial ceramic tile waste in India. From the results it can be seen that it is possible to produce a concrete with good strength by using ceramic waste as an aggregate in .It is also seen from the results that the compressive strength characteristics of ceramic aggregate concrete met the re

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Dai, Liang, Yilin Chang, and Zhong Shen. "An Optimal Task Scheduling Algorithm in Wireless Sensor Networks." International Journal of Computers Communications & Control 6, no. 1 (2011): 101. http://dx.doi.org/10.15837/ijccc.2011.1.2205.

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Sensing tasks should be allocated and processed among sensor nodes in minimum times so that users can draw useful conclusions through analyzing sensed data. Furthermore, finishing sensing task faster will benefit energy saving, which is critical in system design of wireless sensor networks. To minimize the execution time (makespan) of a given task, an optimal task scheduling algorithm (OTSA-WSN) in a clustered wireless sensor network is proposed based on divisible load theory. The algorithm consists of two phases: intra-cluster task scheduling and inter-cluster task scheduling. Intra-cluster t

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Ullah, Khan, Shehzad Ali, Abbasi Munir, and Arshad Hussain. "Thermo diffusion aspects in Jeffrey nanofluid over periodically moving surface with time dependent thermal conductivity." Thermal Science, no. 00 (2019): 312. http://dx.doi.org/10.2298/tsci190428312u.

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Double diffusion flow of Jeffrey fluid in presence of nanoparticles is studied theoretically under time dependent thermal conductivity. The considered nanoparticles are evaporated over convectively heated surface which moves periodically in its own plane. The appropriate dimensionless variables are employed to obtain the dimensionless forms of governing equations. We computed the analytical solution of nonlinear differential equations by utilizing homotopy analysis method. The present investigation reveals the features of various emerging parameters like Deborah number, combined parameter, osc

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Abilmazhinov, Yermek, Kapan Shakerkhan, Vladimir Meshechkin, Yerzhan Shayakhmetov, Nurzhan Nurgaliyev, and Anuarbek Suychinov. "Mathematical Modeling for Evaluating the Sustainability of Biogas Generation through Anaerobic Digestion of Livestock Waste." Sustainability 15, no. 7 (2023): 5707. http://dx.doi.org/10.3390/su15075707.

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The paper investigates the mathematical modeling of anaerobic fermentation for the utilization of animal wastes. It analyzes various approaches to the mathematical modeling of anaerobic digestion processes. However, most of the models previously proposed do not take into account a number of key parameters such as the levels of micro and macronutrientls (such as K, Na, Ca, Mg, Mo, etc.), values of volatile fatty acids, C/N ratio, pH levels, extent of grinding, moisture, and others. This paper proposes a new mathematical model of anaerobic fermentation under industrial scale conditions. The mode

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Petrus, Himawan Tri Bayu Murti, Muhammad Olvianas, Muhammad Faiz Shafiyurrahman, et al. "Circular Economy of Coal Fly Ash and Silica Geothermal for Green Geopolymer: Characteristic and Kinetic Study." Gels 8, no. 4 (2022): 233. http://dx.doi.org/10.3390/gels8040233.

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The study of geopolymers has become an interesting concern for many scientists, especially in the infrastructure sector, due to having inherently environmentally friendly properties and fewer energy requirements in production processes. Geopolymer attracts many scientists to develop practical synthesis methods, useful in industrial-scale applications as supplementary material for concrete. This study investigates the geopolymerization of fly ash and geothermal silica-based dry activator. The dry activator was synthesized between NaOH and silica geothermal sludge through the calcination process

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Hamada, Taku, Hideki Sasaki, Tatsuya Hayashi, Toshio Moritani, and Kazuwa Nakao. "Enhancement of whole body glucose uptake during and after human skeletal muscle low-frequency electrical stimulation." Journal of Applied Physiology 94, no. 6 (2003): 2107–12. http://dx.doi.org/10.1152/japplphysiol.00486.2002.

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There is considerable evidence to suggest that electrical stimulation (ES) activates glucose uptake in rodent skeletal muscle. It is, however, unknown whether ES can lead to similar metabolic enhancement in humans. We employed low-frequency ES through surface electrodes placed over motor points of quadriceps femoris muscles. In male subjects lying in the supine position, the highest oxygen uptake was obtained by a stimulation pattern with 0.2-ms biphasic square pulses at 20 Hz and a 1-s on-off duty cycle. Oxygen uptake was increased by approximately twofold throughout the 20-min stimulation pe

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ALMisned, Ghada, Huseyin O. Tekin, Ghaida Bilal, et al. "Trivalent Ions and Their Impacts on Effective Conductivity at 300 K and Radio-Protective Behaviors of Bismo-Borate Glasses: A Comparative Investigation for Al, Y, Nd, Sm, Eu." Materials 14, no. 19 (2021): 5894. http://dx.doi.org/10.3390/ma14195894.

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We aimed to determine the contribution of various trivalent ions like Al and rare-earths (Y, Nd, Sm, Eu) on resistance behaviors of different types of bismo-borate glasses. Accordingly, eight different bismuth borate glasses from the system: 40Bi2O3–59B2O3–1Tv2O3 (where Tv = Al, Y, Nd, Sm, and Eu) and three glasses of (40Bi2O3–60B2O3; 37.5Bi2O3–62.5B2O3; and 38Bi2O3–60B2O3–2Al2O3) compositions were extensively investigated in terms of their nuclear attenuation shielding properties, along with effective conductivity and buildup factors. The Py-MLBUF online platform was also utilized for determi

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Asrori, Asrori, Suparman Sudjito, Wahyudi Slamet, and Widhiyanuriyawan Denny. "INVESTIGATION OF STEAM GENERATION PERFORMANCE ON CONICAL CAVITY RECEIVER BY DIFFERENT GEOMETRIC CONCENTRATION RATIOS FOR FRESNEL LENS SOLAR CONCENTRATOR." Eastern-European Journal of Enterprise Technologies 4, no. 8 (106) (2020): 6–14. https://doi.org/10.15587/1729-4061.2020.209778.

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The paper discusses the comparison of the performance of steam generators in large and small receivers, using a Fresnel lens concentrator. The goal is to get the best value from the efficiency of a steam generator between large and small receivers, with the following task details: a) design a conical cavity receiver that has the most efficient geometric concentration ratio; b) compare the thermal efficiency of conical cavity receivers that have different geometric concentration ratios; c) analyze the potential of the steam energy from the conical cavity receiver produced by the

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Borji, Mehdi, Kazem Atashkari, Nader Nariman-zadeh, and Mehdi Masoumpour. "Modeling, parametric analysis and optimization of an anode-supported planar solid oxide fuel cell." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 17 (2015): 3125–40. http://dx.doi.org/10.1177/0954406214568823.

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Solid oxide fuel cell is a promising tool for distributed power generation systems. This type of power system will experience different conditions during its operating life. The present study aims to simulate mathematically a direct internal reforming planar type anode supported solid oxide fuel cell considering mass and energy conservation equations along with a complete electrochemical model. Two main reactions, namely water–gas shift reaction and methane steam reforming reaction, are considered as two dominant reactions occurring in a fuel cell. Such a model may be employed to examine the e

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Mohamed, Siti, Md Hossain, Mohamad Mohamad Kassim, et al. "Recycling Waste Cotton Cloths for the Isolation of Cellulose Nanocrystals: A Sustainable Approach." Polymers 13, no. 4 (2021): 626. http://dx.doi.org/10.3390/polym13040626.

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There is an interest in the sustainable utilization of waste cotton cloths because of their enormous volume of generation and high cellulose content. Waste cotton cloths generated are disposed of in a landfill, which causes environmental pollution and leads to the waste of useful resources. In the present study, cellulose nanocrystals (CNCs) were isolated from waste cotton cloths collected from a landfill. The waste cotton cloths collected from the landfill were sterilized and cleaned using supercritical CO2 (scCO2) technology. The cellulose was extracted from scCO2-treated waste cotton cloths

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Feng, Yao, Zhaojun Li, Chenfeng Liu, Tiezhu Yan, Huading Shi, and Rongjin Yang. "Effects of the Ingredients on Maturity and Humification during Kitchen Waste Composting as Illustrated by Nuclear Magnetic Resonance." Sustainability 15, no. 18 (2023): 13436. http://dx.doi.org/10.3390/su151813436.

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Kitchen waste (KW) production has risen considerably due to the increasing affluence of populations and a booming catering sector. If not properly disposed, KW can bring serious issues for the environment. Composting is widely used as an efficient method for the resource utilization of KW. In the present paper, the effects of different ratios of ingredients (corn straw: garden waste = 4:1, based on the dry mass) on maturity and humification during KW composting were investigated. The results showed that the nitrogen retention capacity of the treatments with a ratio of ingredients to KW of 1:2.

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Sun, Yunpeng, Xin Zhang, Jingtian Xian, et al. "Saline–Alkaline Characteristics during Desalination Process and Nitrogen Input Regulation in Reclaimed Tidal Flat Soils." Sustainability 15, no. 5 (2023): 4378. http://dx.doi.org/10.3390/su15054378.

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Coastal salt-affected soils account for a large area all around the world. Soil salinity and pH are two important parameters affecting soil quality. Investigating the correlation of electrical conductivity (EC) and pH at different soil depths in saline soil was useful for quickly assessing the saline–alkaline characteristics. During the natural desalination process in the field area of reclaimed lands, the phenomena of pH increase and nitrogen accumulation may occur. A field sampling experiment was conducted in slightly saline soil affected by natural desalination and newly reclaimed heavily s

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Divyesh, R. Keraliya, Sandhani R P, and Langhnoja N V. "ABC ALGORITHM BASED MINIMIZATION OF THE DETACTION ERROR IN COOPERATIVE SENSING." ICTACT Journal on Communication Technology 12, no. 3 (2021): 2504–9. http://dx.doi.org/10.21917/ijct.2021.0370.

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In the recent wireless communication trends, the radio frequency spectrum is the prime concern for effective utilization as there are many radio frequency channels simultaneously used by many users. Cognitive radio (CR) can be the most useful new technique to utilize the radio frequency spectrum effectively and efficiently. Multiple users of the cognitive radio can be detected by sensing the spectrum in cooperative mode and vacant spectrum space is detected from these cognitive radio networks (CRN) for new users. Information of these CR users jointly utilized and combined at the common receive

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Liu, Fan, Guanghui Jiang, Jia Wang, and Fang Guo. "The Recharge Process and Influencing Meteorological Parameters Indicated by Cave Pool Hydrology in the Bare Karst Mountainous Area." Sustainability 13, no. 4 (2021): 1766. http://dx.doi.org/10.3390/su13041766.

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Understanding the recharge and runoff processes of the vadose zone is significant for water resource management and utilization in karst mountain areas. Hydrological modeling of the vadose zone in karst caves has provided new methods of evaluating water resources in vadose zones. This paper provides modeling of vadose zone hydrology in a subtropical karst cave. The monitoring was conducted in Yuanyang Cave, Fengshan County, Guangxi Province, Southwest China. By monitoring the water level of a pool recharged by drop water in a cave, a model was established to calculate the natural leakage from

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Zhou, Anli, and Lun Ma. "Thermogravimetric Analysis on Co-Gasification Characteristics of Sludge and Straw under CO2 Atmosphere." Processes 11, no. 5 (2023): 1402. http://dx.doi.org/10.3390/pr11051402.

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To maximize the potential energy utilization of agricultural and forestry wastes and sludge, experimental studies were conducted on the co-gasification characteristics of two types of sludge (municipal sludge, MS; paper-mill sludge, PS) and a typical biomass straw (ST) under CO2 atmosphere. In this paper, the main two stages of the gasification process, the pyrolysis in the low-temperature region and the CO2-gasification in the high-temperature region, were separately studied and analyzed. The experimental results showed that biomass could effectively promote the pyrolysis of the sludge in the

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Halbur, Joseph G., Jinsu Hong, Sara Llamas-Moya, et al. "306 Nutrient Digestibility and Dietary Energy Values in Growing Pigs Fed a Corn Distillers Dried Grains with Soluble (Cddgs)-Based Diet with Multi-Enzyme Supplementation." Journal of Animal Science 101, Supplement_2 (2023): 247–48. http://dx.doi.org/10.1093/jas/skad341.281.

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Abstract Dietary enzyme supplementation may enhance the digestibility and utilization of non-starch components of the diet by pigs. This study was conducted to evaluate the efficacy of a multi-carbohydrase enzyme (ENZ) in growing pigs for apparent ileal digestibility (AID) of amino acids (AA), apparent total tract digestibility (ATTD) of nutrients and energy values in a corn distillers dried grains with solubles (cDDGS)-based diet. A total of 12 ileal-cannulated pigs [initial body weight (BW) = 31.7 kg ± 3.04] were housed in individual metabolic crates for 21 days (Period 1) and subsequently t

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