Статті в журналах: "Overall energy efficiency"

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Water, Thames, Simon Whatley, and Angus Berry. "Overall energy efficiency practices." World Pumps 2008, no. 500 (May 2008): 56–58. http://dx.doi.org/10.1016/s0262-1762(08)70154-8.

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Schäfer, Winfried. "Energy crops and renewable energy: overall and process efficiency." Suomen Maataloustieteellisen Seuran Tiedote, no. 23 (January 31, 2008): 1–6. http://dx.doi.org/10.33354/smst.75866.

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Introduction and Objectives The crop scientist focuses his research on high quantity and quality of yield based on a sustainable tilth. The engineer is interested in maximisation of the process efficiency. He interprets the crop scientist’s ap-proach as maximisation of photosynthesis efficiency. Objective of this paper is to support the assessment of energy crop production applying engineering sciences methods in energy accounting. Methods and results The sustainability of energy crop production is assessed by calculating the overall efficiency using rape as example. The results show that the high process energy efficiency of the rapeseed cultivation fosters com-mon acceptance of rape as energy crop. Even under Finnish climate conditions, exergy of rape crop ex-ceeds up to 11-times the energy input for production and exergy of seed up to 3.7 times. Conversion of rapeseed into fuel decreases the energy surplus. Rape methyl ester (RME) delivers still 1.2-fold the energy input for cultivation and conversion. The whole rape crop (root, straw, seed) contains 3 to 6 ‰ of the overall energy input, RME 1 to 2 ‰ only. Animal production converts rape meal feed into manure, which is suitable for anaerobic digestion together with glycerine. The biogas augments the overall efficiency additionally 0.2 to 0.5 ‰. Rape cultivation requires a 4 to 7-year crop rotation. This and the low overall efficiency make it difficult in Finland to achieve energy self-sufficiency replacing diesel fuel by RME. The technical efficiency of the photosynthesis limits the maximum energy yield and reaches up to 0.8 % in Finland. By comparison, the efficiency of a photovoltaic collector is 165 to 248-fold better than the con-version efficiency of biomass or biogas produced from rapeseed and rape straw into electric power. The efficiency of the thermal collector exceeds heat production from burning the rape crop 157 to 443-fold. However, storage and continuous production of power and heat from sun energy is very limited. For that reason, the storage of sun energy in liquid carbon hydrates is subject of present research. Conclusion Energy crop production is captivating with many win-win situations: environmentally neutral bio-fuels replace polluting fossil fuels, farmers get better prices for energy crops, the agrochemical industry gains from intensification of energy crop production, and turn over of power industry grows due to increasing energy consumption to produce agrochemicals and to process biomass into fuel. As a following, the state tax income improves too. However, better prices for mainstream energy crops may trigger export of envi-ronmental pollution at the expense of food production because higher overall efficiency in tropical coun-tries favours the import of organic raw material for bio fuel production. Yet, high process efficiencies of technical processes to convert biomass into fuel justify the production of renewable energy from organic waste and residues. Thus, agriculture should not focus on energy crop production but produce high quality food environment-friendly. The overall efficiency of energy production from energy crops will never be competitive with solar techniques. Solar collectors replace fossil fuels for heat production outside agricul-ture already now sustainable and more efficient. Research on solar-technical processes to produce liquid carbon hydrates from methane, carbon dioxide, and water powered by solar energy without diversion into photosynthesis offers much a greater potential than research on energy crop production. As a measure for sustainability of renewable energy production, the energy surplus from sun energy conversion per capita and square meter is proposed.

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Шастун, Світлана Вікторівна. "Overall assessment of the energy efficiency in Ukraine." Technology audit and production reserves 6, no. 5(32) (November 24, 2016): 36–41. http://dx.doi.org/10.15587/2312-8372.2016.87541.

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Radosavljevic, Dusan, Aleksandar Manojlovic, Olivera Medar, and Nebojsa Bojovic. "Vehicle fleet energy efficiency: Influence on overall vehicle effectiveness." Thermal Science 22, no. 3 (2018): 1537–48. http://dx.doi.org/10.2298/tsci170926074r.

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This paper presents the research on vehicle fleet energy efficiency impact upon overall vehicle effectiveness. Transport companies and companies with own vehicle fleets tend to enhance their resource effectiveness, and to increase their transport service quality with the objective of attaining a competitive position on the market. Since energy consumed for transport operations is an important transport process resource, a method for assessing transport process effectiveness has been developed with the objective of increasing vehicle fleet effectiveness and its energy efficiency, and the overall vehicle effectiveness human indicator has been defined accordingly. The developed method was then implemented in an actual vehicle fleet and variations of the overall vehicle effectiveness human indicator were researched, as well as specific energy consumptions for respective net transport volumes depending on the following indicators: vehicle payload capacity utilization rate and mileage utilization rate. It is shown that specific energy consumption influences overall vehicle effectiveness depending on both the payload capacity utilization rate and mileage utilization rate.

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Wang, Hui, Xiu Ji, Liao Xu, Hong Zhang, and Yinping An. "Analysis on overall energy efficiency and flexibility of thermal integrated energy system." Thermal Science 27, no. 2 Part A (2023): 975–81. http://dx.doi.org/10.2298/tsci2302975w.

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In order to solve the problem of energy consumption, improve the efficiency of energy utilization and develop new energy, the total energy consumption and fluctuation of thermal integrated energy were analyzed. Four suggestions are put forward for the integrated power system of flexible thermal power plant, namely, electric heat storage system, electric heat pump heat storage system, g, heating system and high pressure heating system via steam turbine, which can improve the air energy consumption capacity of the system and reduce the total coal consumption of the system. Among them, in the case of small air conditioning units or small air conditioning units do not use electric heating furnace and electric heat pump furnace. Heat storage technology of thermal power unit is not suitable for daily exhaust. In contrast, the high pressure/IP bypass heating process of steam turbine is more flexible and less restrictive, which is the best method for comparison. Compared with other schemes discussed by the author, this scheme has the highest flexibility and the least restrictions, and is the best one among the four.

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Haglid, Klas C. "Two Approaches to Using Energy Recovery to Improve Overall System Energy Efficiency Rating." Energy Engineering 106, no. 4 (July 2009): 7–28. http://dx.doi.org/10.1080/01998590909509184.

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Et.al, Raghunandan G. H. "Energy-Efficient Hybrid Hierarchical Routing scheme for overall Efficiency in WSN." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 3 (April 11, 2021): 3581–88. http://dx.doi.org/10.17762/turcomat.v12i3.1635.

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Wireless Sensor Network are spatially distributed sensors intended to monitor different physiological conditions. Sensing and communicating data from one place to another consumes more energy, therefore the management of sensor energy is a very important factor. Energy utilization, synchronization, and a lifetime of the network are the main criteria in WSN. More energy is utilized by sensors that are distant from the base station. The gateway nodes are deployed to collect and relay information from nodes to the base station to resolve this problem. To decrease energy consumption, gateway nodes are deployed in the network. In this paper, a hybrid approach is used to increase the overall efficiency of the network in WSNs with time synchronization which increases the throughput of the network. The efficiency of proposed protocol based network has shown improvements in network lifetime, residual energy, data packets, and the throughput of the network. The performance of WSN of the proposed scheme is compared to other classical routing schemes and the proposed algorithm has proved its merit.

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Vouros, Alexandros, Emmanouil Mathioulakis, Elias Papanicolaou, and Vassilis Belessiotis. "Modelling the overall efficiency of parabolic trough collectors." Sustainable Energy Technologies and Assessments 40 (August 2020): 100756. http://dx.doi.org/10.1016/j.seta.2020.100756.

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Alhaisoni, Majed. "IoT Energy Efficiency through Centrality Metrics." Annals of Emerging Technologies in Computing 3, no. 2 (April 1, 2019): 14–21. http://dx.doi.org/10.33166/aetic.2019.02.002.

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The Internet of Things is the current and next revolution in integrating various technologies and wireless communications. It has been shown to make an important contribution in various modes of communication, in homes, offices and other buildings. However, certain research issues are still remain, such as life span of the network and a definition of the most influential nodes in communications, which affect the overall energy distribution. This paper introduces a new approach to enhance the communication over the internet of things, by combining two different domains, the computer network and network science. Various scenarios have been thoroughly implemented and tested over different network topologies. The results show clear enhancements on network centrality and overall energy distribution.

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Nadimi, Reza, and Koji Tokimatsu. "Potential energy saving via overall efficiency relying on quality of life." Applied Energy 233-234 (January 2019): 283–99. http://dx.doi.org/10.1016/j.apenergy.2018.10.039.

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Șoimoșan, Teodora M., Ligia M. Moga, Livia Anastasiu, Daniela L. Manea, Aurica Căzilă, and Čedomir Zeljković. "Overall Efficiency of On-Site Production and Storage of Solar Thermal Energy." Sustainability 13, no. 3 (January 28, 2021): 1360. http://dx.doi.org/10.3390/su13031360.

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Harnessing renewable energy sources (RES) using hybrid systems for buildings is almost a deontological obligation for engineers and researchers in the energy field, and increasing the percentage of renewables within the energy mix represents an important target. In crowded urban areas, on-site energy production and storage from renewables can be a real challenge from a technical point of view. The main objectives of this paper are quantification of the impact of the consumer’s profile on overall energy efficiency for on-site storage and final use of solar thermal energy, as well as developing a multicriteria assessment in order to provide a methodology for selection in prioritizing investments. Buildings with various consumption profiles lead to achieving different values of performance indicators in similar configurations of storage and energy supply. In this regard, an analysis of the consumption profile’s impact on overall energy efficiency, achieved in the case of on-site generation and storage of solar thermal energy, was performed. The obtained results validate the following conclusion: On-site integration of solar systems allowed the consumers to use RES at the desired coverage rates, while restricted by on-site available mounting areas for solar fields and thermal storage, under conditions of high energy efficiencies. In order to segregate the results and support optimal selection, a multicriteria analysis was carried out, having as the main criteria the energy efficiency indicators achieved by hybrid heating systems.

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Dutta, Rukmi. "Maximising energy efficiency with electric motors." Open Access Government 39, no. 1 (July 10, 2023): 554–55. http://dx.doi.org/10.56367/oag-039-10891.

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Maximising energy efficiency with electric motors Rukmi Dutta from the University of New South Wales discusses the mechanisms and efficiency potential of electric motor systems, looking at how electric motors work, efficiency and losses and improving overall system efficiency for electric motors. Increased industrial activities in developing economies like India, China, and many others will push the use of motors even further. Electrical motors are the powerhouse of the industrial world, she explains, discussing efficiently converting electrical energy into mechanical power. Many critical sectors use electrical motors, including industrial, commercial, residential, agricultural and transport. The worldwide growth of electrical motor-driven systems is predicted to double by 2040. Overall, UNSW Sydney’s Electrical Machines and Drive Systems research team is at the forefront and contributes to developing novel, highly efficient motors and drives suitable for many applications.

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Franzese, Oscar, Mary Beth Lascurain, and Luke W. Loy. "Effect of Heavy-Truck Platooning Fuel-Efficiency Gains on Overall Fuel Efficiency." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 5 (April 8, 2019): 188–96. http://dx.doi.org/10.1177/0361198119840340.

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Many studies addressing the fuel-efficiency gains derived from heavy-truck platooning operations have shown that it is possible to achieve increases in fuel efficiency of 10% or more. These studies focus only on the gains realized while traveling under platooning conditions (i.e., highway speeds sustained for sizable intervals of time). However, heavy-truck long-haul operations involve many other travel conditions that fall outside platooning-travel conditions. This paper studies the effect of platooning fuel-efficiency gains on the fuel efficiency of the overall operation. The authors used real-world data collected by the Oak Ridge National Laboratory for a U.S. Department of Energy study to determine the percentage of distance traveled that is “platoonable.” With this and the fuel consumption information collected in the study, the fuel-efficiency gain for the entire operation was computed, as well as annual fuel cost savings.

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Albatayneh, Aiman, Mohammad N. Assaf, Dariusz Alterman, and Mustafa Jaradat. "Comparison of the Overall Energy Efficiency for Internal Combustion Engine Vehicles and Electric Vehicles." Environmental and Climate Technologies 24, no. 1 (January 1, 2020): 669–80. http://dx.doi.org/10.2478/rtuect-2020-0041.

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Abstract The tremendous growth in the transportation sector as a result of changes in our ways of transport and a rise in the level of prosperity was reflected directly by the intensification of energy needs. Thus, electric vehicles (EV) have been produced to minimise the energy consumption of conventional vehicles. Although the EV motor is more efficient than the internal combustion engine, the well to wheel (WTW) efficiency should be investigated in terms of determining the overall energy efficiency. In simple words, this study will try to answer the basic question – is the electric car really energy efficient compared with ICE-powered vehicles? This study investigates the WTW efficiency of conventional internal combustion engine vehicles ICEVs (gasoline, diesel), compressed natural gas vehicles (CNGV) and EVs. The results show that power plant efficiency has a significant consequence on WTW efficiency. The total WTW efficiency of gasoline ICEV ranges between 11–27 %, diesel ICEV ranges from 25 % to 37 % and CNGV ranges from 12 % to 22 %. The EV fed by a natural gas power plant shows the highest WTW efficiency which ranges from 13 % to 31 %. While the EV supplied by coal-fired and diesel power plants have approximately the same WTW efficiency ranging between 13 % to 27 % and 12 % to 25 %, respectively. If renewable energy is used, the losses will drop significantly and the overall efficiency for electric cars will be around 40–70% depending on the source and the location of the renewable energy systems.

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Peng, Lihong, Yiting Zhang, Yejun Wang, Xiaoling Zeng, Najun Peng, and Ang Yu. "Energy efficiency and influencing factor analysis in the overall Chinese textile industry." Energy 93 (December 2015): 1222–29. http://dx.doi.org/10.1016/j.energy.2015.09.075.

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Ma, Yun Long, Xiao Hua Chen, Bo Liu, and Guo Feng Zhang. "Energy Efficiency Assessment Oriented Building Energy Consumption System Model." Applied Mechanics and Materials 415 (September 2013): 734–40. http://dx.doi.org/10.4028/www.scientific.net/amm.415.734.

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This paper analyzes the characteristics and composition of the energy consumption system of the building from the perspective of systematic energy conservation and presents the systematic framework of the consumption model. Based on the framework, the paper focuses on how to establish a building energy consumption assessment system, find the energy efficiency index system and assessment approaches, and apply the results directly into building energy conservation and emission reduction. It not only facilitates greatly the overall and efficient management of the energy consumption system of the building, but also serves as another new approach to achieve energy conservation and emission reduction.

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Shanthi, S. Anita, and K. G. Basavaraju. "Estimating the overall efficiency of storage batteries in Fermatean picture fuzzy environment." E3S Web of Conferences 405 (2023): 02028. http://dx.doi.org/10.1051/e3sconf/202340502028.

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Electricity storage devices play a very vital role in eﬃcient energy management. Storage technologies vary depending on the speciﬁc needs and applications. Battery is a electric storage system which converts chemical energy into electrical energy and possess some speciﬁc parameters that characterize them. Here, four types of storage batteries are evaluated based on their eﬃciency, cost, life span and energy density properties using COPRAS and ARAS methods on Fermatean picture fuzzy sets. Firstly a decision matrix is constructed using Fermatean picture fuzzy sets and it is normalized. Entropy measure is deﬁned which helps in calculation of weight values. Next aggregated weighted normalized Fermatean picture fuzzy matrix is found and using this relative signiﬁcant and utility values are calculated in COPRAS method. In ARAS method optimal function values are determined and utility values are found. The alternatives are ranked based on the utility values. In both the methods it is found that the rank of the best alternative is the same whereas the ranking of other alternatives vary.

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DVOŘÁK, Petr, and Jiří ŠTOLLER. "Energy Efficiency in Military Camps." Challenges to national defence in contemporary geopolitical situation 2022, no. 1 (October 28, 2022): 209–13. http://dx.doi.org/10.47459/cndcgs.2022.26.

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The article deals with the issue of the energy efficiency in military camps. The military camps are mostly built during military deployments in case of exercises or missions. As different kinds of temporary structures are typically used to shelter large part of the camps’ facilities, the area of improvement for better energy efficiency lies mainly in the utilization of energy efficient devices, machines and pieces of equipment that are used by deployed personnel. The resulting lower energy consumption does not only bring lower financial and logistical burden to the military units but also contribute to the lower environmental impact of military activities. And ultimately, lowering energy use, especially fossil fuel, may result in cleaner environment and significantly affect health of deployed personnel. Overall, there are many benefits brought by energy efficient devices and equipment in several overlapped areas in military camps and their surroundings.

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Regina de Casas Castro Marins, Karin. "A method for energy efficiency assessment during urban energy planning." Smart and Sustainable Built Environment 3, no. 2 (September 9, 2014): 132–52. http://dx.doi.org/10.1108/sasbe-12-2013-0056.

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Purpose – Energy use in urban areas has turned a subject of local and worldwide interest over the last few years, especially emphasized by the correlated greenhouse gases emissions. The purpose of this paper is to analyse the overall energy efficiency potential and emissions resulting from integrated solutions in urban energy planning, in the scale of districts and neighbourhoods in Brazil. Design/methodology/approach – The approach is based on the description and the application of a method to analyse energy performance of urban areas and support their planning. It is a quantitative bottom-up method and involves urban morphology, urban mobility, buildings and energy supply systems. Procedures are applied to the case study of Agua Branca urban development area, located in Sao Paulo, Brazil. Findings – In the case of Agua Branca area, energy efficiency measures in buildings have shown to be very important mostly for the buildings economies themselves. For the area as a whole, strategies in promoting public transport are more effective in terms of energy efficiency and also to decrease pollutant emissions. Originality/value – Literature review has shown there is a lack of approaches and procedures able to support urban energy planning at a community scale. The bottom-up method presented in this paper integrates a plenty of disaggregated and multisectoral parameters at the same stage in urban planning and shows that is possible to identify the most promising actions by building overall performance indexes.

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Dolšak, Janez, Nevenka Hrovatin, and Jelena Zorić. "Estimating the efficiency in overall energy consumption: Evidence from Slovenian household-level data." Energy Economics 114 (October 2022): 106241. http://dx.doi.org/10.1016/j.eneco.2022.106241.

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DAIGO, Ichiro, Takashi WAKAMATSU, Eiji YAMASUE, and Keiichi N. ISHIHA. "Evaluation of Energy Efficiency in Transportation by the Use of Overall Friction Coefficient." Journal of the Japan Institute of Energy 84, no. 2 (2005): 119–25. http://dx.doi.org/10.3775/jie.84.119.

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Daniel, Podmirseg. "Contribution of Vertical Farms to Increase the Overall Energy Efficiency of Urban Agglomerations." Journal of Power and Energy Engineering 02, no. 04 (2014): 82–85. http://dx.doi.org/10.4236/jpee.2014.24013.

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Okubo, Toshikazu, Hiroyuki Shoji, Hideho Yamamura, Shinobu Irikura, and Naoki Maru. "Improving the Overall Efficiency of Front-End Power Supplies by Surge Energy Recycling." Electrical Engineering in Japan 185, no. 3 (July 22, 2013): 41–48. http://dx.doi.org/10.1002/eej.22477.

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Ahmed, Ajaz. "Energy Smart Buildings: Potential for Conservation and Efficiency of Energy." Pakistan Development Review 53, no. 4II (December 1, 2014): 371–81. http://dx.doi.org/10.30541/v53i4iipp.371-381.

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Energy is the basic ingredient for economic growth and development [Lorde, et al. (2010)]. Presently demand for energy has significantly increased due to the overall expansion of economic and industrial activity in all important economic sectors e.g. industry, agriculture, and services. In addition to the expansion of economic activity and subsequent increase in energy demand at industrial level, population growth and increased consumption are also adding to the demand for energy [OECD (2011)]. In other words, modern economy has become highly dependent on energy resources. In order to meet the increased energy demand and ensure its sustainable supply, there is a need to have strong and robust plans with all options to consider at various levels.

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Liu, Sha, and Jiong Shen. "Improved Thermoeconomic Energy Efficiency Analysis for Integrated Energy Systems." Processes 10, no. 1 (January 10, 2022): 137. http://dx.doi.org/10.3390/pr10010137.

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The structure of an integrated energy system is complex. Thermoeconomics can play a significant role in the analysis of IES because it makes up for the deficiency of traditional thermodynamic analysis and provides new information on the cost and energy conversion efficiency. When using thermoeconomics to analyze the energy efficiency of an IES, one key issue that needs to be solved is how to transfer irreversible loss across thermal cycles, so that the mechanism of system performance degradation can be fully revealed. To this end, an irreversible cost and exergy cost integrated analysis method based on improved thermoeconomics is proposed, in which the cumulative and transmission impact of irreversible loss across thermal cycles is evaluated using linear transformation of <KP> matrix. A case study on a 389MW combined cooling, heating, and power IES demonstrates the effectiveness of the proposed approach. The proposed approach can reveal the key links impairing the overall energy efficiency and transfer of irreversible loss across thermal cycles. The approach can be extended to various types of IES to provide directions for the assessment and optimization of the system.

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Tian, Jin Yu, and Na Zhao. "Based on PCA that Affect China's Energy Efficiency." Applied Mechanics and Materials 401-403 (September 2013): 2209–12. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.2209.

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Energy consumption scales have been expanding, but energy efficiency is relatively low, and its important to analysis of essential factors that affect China's energy efficiency. In this paper, via principal component analysis, make the overall comparison and evaluation on the situation of China's energy efficiency. Changes in the industrial structure and energy consumption structure are the most important factor affecting energy efficiency.

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Filonenko, Olena, Oleg Yurin, Nataliia Mahas, Viktor Rudenko, Pavlo Semko, and Bohdan Tokar. "MODERN ARCHITECTURE AND ENERGY EFFICIENCY." Collection of Scientific Works of the Ukrainian State University of Railway Transport, no. 202 (December 22, 2022): 27–35. http://dx.doi.org/10.18664/1994-7852.202.2022.273592.

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The article analyzes the design solutions for the outer walls of residential buildings built in 2020-2022 in a city that belongs to the II temperature zone of Ukraine. The outer walls of the monolithic reinforced concrete frame of the building are made of hollow brick 250 mm thick with a façade system of heat-insulating and finishing class A. A verification thermotechnical calculation of the outer wall was carried out, taking into account heat-conducting inclusions, the reduced heat transfer resistance of an opaque enclosing structure (wall) does not correspond to the minimum allowable value of heat transfer resistance of the corresponding structure according to DBN V.2.6 – 31:2016 for the II temperature zone. When taking into account the effect of air permeability on reducing the overall level of thermal protection of the fence, it was determined that the calculated reduced value of the resistance to heat transfer of the outer wall will be even lower due to the fact that the structure consists of light cellular materials with a significant breathability. External enclosing structures and internal, dividing rooms with a temperature difference of 4 ° C or more, have insufficient insulation thickness. When developing insulation measures, the effect of air filtration through wall structures made of lightweight materials is not taken into account. The requirements for the insulation of complex structural units of enclosing structures to prevent the formation of "cold bridges", for example, a balcony slab, are not met. Translucent structures, which occupy more than 50% of the facades, are the cheapest, their heat transfer resistance is less than the minimum allowable value. Based on the results of the analysis, the main measures to improve the energy efficiency of residential multi-storey buildings were identified to enable the installation of large windows in residential and public buildings in the climatic conditions of Ukraine.

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Leon-Quiroga, Jorge, Brittany Newell, Mahesh Krishnamurthy, Andres Gonzalez-Mancera, and Jose Garcia-Bravo. "Energy Efficiency Comparison of Hydraulic Accumulators and Ultracapacitors." Energies 13, no. 7 (April 2, 2020): 1632. http://dx.doi.org/10.3390/en13071632.

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Energy regeneration systems are a key factor for improving energy efficiency in electrohydraulic machinery. This paper is focused on the study of electric energy storage systems (EESS) and hydraulic energy storage systems (HESS) for energy regeneration applications. Two test benches were designed and implemented to compare the performance of the systems under similar operating conditions. The electrical system was configured with a set of ultracapacitors, and the hydraulic system used a hydraulic accumulator. Both systems were designed to have the same energy storage capacity. Charge and discharge cycle experiments were performed for the two systems in order to compare their power density, energy density, cost, and efficiency. According to the experimentally obtained results, the power density in the hydraulic accumulator was 21.7% higher when compared with the ultracapacitors. Moreover, the cost/power ($/Watt) ratio in the hydraulic accumulator was 2.9 times smaller than a set of ultracapacitors of the same energy storage capacity. On the other hand, the energy density in the set of ultracapacitors was 9.4 times higher, and the cost/energy ($/kWh) ratio was 2.9 times smaller when compared with the hydraulic accumulator. Under the tested conditions, the estimated overall energy efficiency for the hydraulic accumulator was 87.7%, and the overall energy efficiency for the ultracapacitor was 78.7%.

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Chuquin-Vasco, Daniel, Cristina Calderón-Tapia, Nelson Chuquin-Vasco, María Núñez-Moreno, Diana Aguirre-Ruiz, and Vanesa G. Lo-Iacono-Ferreira. "Mathematical modeling of a binary ORC operated with solar collectors. Case study—Ecuador." AIMS Energy 11, no. 6 (2023): 1153–78. http://dx.doi.org/10.3934/energy.2023053.

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<abstract> The present study is significant because it can contribute to developing sustainable energy strategies and expanding knowledge about renewable energies in Ecuador, specifically by modeling two modules: the thermal module (parabolic solar collectors and energy storage tank) and the Organic Rankine Cycle (ORC) module. The objective was to determine a region in Ecuador where the thermal module exhibits the highest efficiency for solar collectors. Subsequently, a detailed analysis of the ORC module was conducted, considering the working fluid, boiling temperature, condensation temperature, pinch point temperature, solar collector area, and the collector area-to-energy storage volume ratio (<italic>Ac/V</italic>). Finally, an economic analysis was performed based on the Net Present Value (NPV), Internal Rate of Return (IRR), and payback period of implementing this type of system. After conducting all the respective analyses in the thermal module, while considering the yearly average meteorological data of ten years (2012–2022), it was determined that due to its meteorological conditions, ambient temperature (14.7 ℃) and solar beam radiation (184.5 W/m2), the efficiency of the collectors in the Andean region of Ecuador is higher. This efficiency is further enhanced by using Therminol VP-1 as the thermal fluid, as it possesses better thermodynamic properties than the other fluids analyzed. Similarly, the ORC module analysis results determined that cyclohexane is the working fluid for the ORC, thereby leading to a higher ORC efficiency (25%) and overall system efficiency (20%). Finally, the system was optimized to maximize the IRR and minimize the <italic>A</italic>c/<italic>V</italic> of the collector for a nominal power of 92 kW. As a result, the optimal operating conditions of the system include a solar collector area of 1600 m2, an energy storage tank volume of 54 m3, an electricity production of 23757 MW/year, a total system efficiency of 22%, an IRR of 15.65% and a payback period of 9.81 years. </abstract>

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Nguyen, Thi Ai Lanh, Le Nhat Hoang Tran, Henri Paris, and Mathieu Museau. "Evaluating Energy Efficiency of Production Machine." Applied Mechanics and Materials 889 (March 2019): 580–87. http://dx.doi.org/10.4028/www.scientific.net/amm.889.580.

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Industry is one of the most important energy consumption sectors. In the world, industry sector accounts for almost a third of energy consumption (28.3%, in 2012) [1]. According to the U.S. Department of Commerce: “Sustainable manufacturing is the creation of manufactured products through economically-sound processes that minimize negative environmental impacts while conserving energy and natural resources”. Nowadays, due to different environmental issues: the deficit of energy resources, the growing concern of the carbon emission, the environment impact... the awareness of energy consumption takes its important in manufacturing industries. In a manufacturing system, production machine is one of the basis energy consumed devices. In order to achieve the long-term goal "sustainable manufacturing", it is necessary then to take into account the energy efficiency of production machine [2]. In fact, increasing energy efficiency of production machine allows to reduce not only energy costs but also the overall environmental impact. Energy efficiency evaluation of production machine is therefore one of the prerequisites for energy saving in manufacturing [3]. In order to support designers during the design phase of the next production machine generation, in this paper, the principal objective is to propose a method to evaluate energy efficiency of a production machine.

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Okasha, A. "DETERMINATION OF CRITICAL IRRADIANCE AND OVERALL EFFICIENCY TO LIFT WATER BY SOLAR ENERGY SYSTEM." Misr Journal of Agricultural Engineering 34, no. 2 (April 1, 2017): 599–616. http://dx.doi.org/10.21608/mjae.2017.96229.

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Rosario, L., and M. M. Rahman. "Overall Efficiency of a Radial Fin Assembly Under Dehumidifying Conditions." Journal of Energy Resources Technology 120, no. 4 (December 1, 1998): 299–304. http://dx.doi.org/10.1115/1.2795051.

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The aim of this paper is the analysis of heat transfer in a radial fin assembly during the process of dehumidification. An individual finned tube geometry is a reasonable representation of heat exchangers used in air conditioning. The condensation process involves both heat and mass transfer and the cooling takes place by the removal of sensible as well as latent heat. The ratio of sensible to total heat is an important quantity that defines the heat transfer process during a dehumidifier operation. A one-dimensional model for heat transfer in the fin and the heat exchanger block is developed to study the effects of condensation on the fin surface. The combined heat and mass transfer process is modeled by incorporating the ratio of sensible to total heat in the formulation. The augmentation of heat transfer due to fin was established by comparing the heat transfer rate with and without fins under the same operating conditions. Calculations were carried out to study the effects of relative humidity and dry bulb temperature of the incoming air, and cold fluid temperature inside the coil on the performance of the heat exchanger. An analysis of the overall efficiency for the assembly was also done. Results were compared to those under dry conditions, wherever appropriate. Comparison between present results and those published for rectangular as well as radial fins under fully wet conditions were made. These comparisons established the validity of the present model. It was found that the heat transfer rate increased with increment in both dry bulb temperature and relative humidity of the air. The augmentation factor, however, decreased with increment in relative humidity and the dry bulb temperature. The fin efficiency decreased with relative humidity.

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Luin, Uroš, and Matjaž Valant. "Electrolysis energy efficiency of highly concentrated FeCl2 solutions for power-to-solid energy storage technology." Journal of Solid State Electrochemistry 26, no. 4 (February 14, 2022): 929–38. http://dx.doi.org/10.1007/s10008-022-05132-y.

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AbstractAn electrochemical cycle for the grid energy storage in the redox potential of Fe involves the electrolysis of a highly concentrated aqueous FeCl2 solution yielding solid iron deposits. For the high overall energy efficiency of the cycle, it is crucial to maximize the energy efficiency of the electrolysis process. Here we present a study of the influence of electrolysis parameters on the energy efficiency of such electrolysis, performed in an industrial-type electrolyzer. We studied the conductivity of the FeCl2 solution as a function of concentration and temperature and correlated it with the electrolysis energy efficiency. The deviation from the correlation indicated an important contribution from the conductivity of the ion-exchange membrane. Another important studied parameter was the applied current density. We quantitatively showed how the contribution of the resistance polarization increases with the current density, causing a decrease in overall energy efficiency. The highest energy efficiency of 89 ± 3% was achieved using 2.5 mol L−1 FeCl2 solution at 70 °C and a current density of 0.1 kA m−2. In terms of the energy input per Fe mass, this means 1.88 Wh g−1. The limiting energy input per mass of the Fe deposit was found to be 1.76 Wh g−1. Graphical abstract

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Kalafati, D. D. "Generalized energy efficiency of a nuclear power station derived from the reactor fuel reproduction ratio and the overall efficiency." Soviet Atomic Energy 62, no. 2 (February 1987): 98–102. http://dx.doi.org/10.1007/bf01123662.

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Ponnusamy, Sathyakala, Sundara Sai Gangadharan, and Balaji Kalaiarasu. "An exergy analysis for overall hidden losses of energy in solar water heater." Thermal Science, no. 00 (2020): 343. http://dx.doi.org/10.2298/tsci200530343p.

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This study investigates the hidden thermal losses of glass plate, collector plate, water pipe and storage tank of solar water heater in the process of energy conversion. The present non-conventional energy methods are insufficient, whereas the exergy analysis provides a remarkable solution. Thus, employing the exergy analysis, entropy generation, exergy destruction and exergy efficiency of each subsystem of solar water heater are computed. The obtained results showed that the entropy generation and exergy destruction are high during the heat transfer in each subsystem. Henceforth, the existing solar water heater design is modified placing hexagonal honeycomb structure between the glass plate and the collector plate and also water pipe is insulated to trap huge amount of solar energy. The proposed design exhibits improved exergy efficiency when compared with the existing model, which enhances the performance of the system.

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Cabral, Matheus Roberto, and Pierre Blanchet. "A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities." Materials 14, no. 8 (April 8, 2021): 1848. http://dx.doi.org/10.3390/ma14081848.

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The main goal of this study was to review current studies on the state of the art of wood constructions with a particular focus on energy efficiency, which could serve as a valuable source of information for both industry and scholars. This review begins with an overview of the role of materials in wood buildings to improve energy performance, covering structural and insulation materials that have already been successfully used in the market for general applications over the years. Subsequently, studies of different wood building systems (i.e., wood-frame, post-and-beam, mass timber and hybrid constructions) and energy efficiency are discussed. This is followed by a brief introduction to strategies to increase the energy efficiency of constructions. Finally, remarks and future research opportunities for wood buildings are highlighted. Some general recommendations for developing more energy-efficient wood buildings are identified in the literature and discussed. There is a lack of emerging construction concepts for wood-frame and post-and-beam buildings and a lack of design codes and specifications for mass timber and hybrid buildings. From the perspective of the potential environmental benefits of these systems as a whole, and their effects on energy efficiency and embodied energy in constructions, there are barriers that need to be considered in the future.

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Wu, Dan, Ching-Cheng Lu, Xiang Chen, Pei-Chieh Tu, An-Chi Yang, and Chih-Yu Yang. "Evaluating the Dynamic Energy Production Efficiency in APEC Economies." Energies 14, no. 14 (July 19, 2021): 4343. http://dx.doi.org/10.3390/en14144343.

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This study introduces the translation adjustment model of Seiford and Zhu (2002) into dynamic DEA models to measure and analyze the dynamic energy efficiency of Asia-Pacific Economic Cooperation (APEC) economies from 2010 to 2014. The APEC economies are divided into annual energy and overall energy efficiency ratings, and improvement directions are proposed for the different variables. With the proposal of magnitude, this study discusses the changes in intertemporal conversion variables and proposes suggestions for improvement. Finally, this study analyzes the implications of energy investment and the efficiency policies of APEC economies. The results show that economies with the lowest overall energy efficiency ratings have great potential for improvement. Reducing capital stock, labor, fossil fuel consumption, and CO2 emissions while increasing GDP can increase energy efficiency ratings. However, economies do not want to reduce the state’s capital stock, and labor and population birth adjustments are difficult. Energy efficiency can only start by adjusting the consumption of fossil fuels, CO2 emissions, and GDP. The results indicate that to improve energy efficiency and reduce fossil fuel consumption and CO2 emissions, economies are expected to increase their GDP unless they enact cuts through policy and technical approaches, appropriately adjust their energy policies, and actively develop new energy technologies to effectively reduce CO2 emissions and achieve optimal energy efficiency.

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Less, V. M., V. Y. Lyubchenko, and D. A. Pavlyuchenko. "Energy efficiency analysis of energy facilities using ranking methods." Power engineering: research, equipment, technology 25, no. 5 (January 12, 2024): 42–58. http://dx.doi.org/10.30724/1998-9903-2023-25-5-42-58.

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RELEVANCE. Increasing energy efficiency is one of the necessary conditions for modernizing the Russian economy. High energy intensity and energy efficiency analysis are due to the combined influence of a number of factors, both global and private. Thus, for electric grid organizations the problem of energy efficiency is a priority. Having at their disposal electrical grid facilities, including points of reception and transmission of electrical energy, electrical equipment and power transmission lines, electrical grid organizations incur huge losses caused by losses during the transmission of electrical energy, losses associated with the unaccounted share of electricity, as well as third-party factors. OBJECT. Conduct an analysis of the energy efficiency of an electric grid organization that has 10 branches. Form a hierarchy of energy efficiency indicators, determine the impact of each indicator on the integral indicator that reflects the energy efficiency of the facility. Conduct benchmarking, identify leaders and outsiders among power grid organizations. METHODS. To calculate the weight coefficients, the method of analysis of hierarchies in the classical and fuzzy formulations was used. Energy efficiency benchmarking was carried out by ranking power grid organizations according to the integral indicator of energy efficiency. RESULTS. A three-level hierarchy of energy efficiency indicators has been formed. A decision-making algorithm is presented when analyzing the energy efficiency of energy industry facilities. The weight coefficients of indicators and integral values of energy efficiency of organizations are calculated. The indicators that have the greatest impact on the overall efficiency of the facility were identified. A summary diagram of comparison of all branches has been formed, the most and least successful organizations have been identified. CONCLUSIONS. The analysis of energy efficiency, carried out using two methods of analysis of hierarchies, made it possible to identify the advantages and disadvantages of the classical representation of the method. Determination of leaders within the branch structure of the electric grid organization allows us to analyze the methods used to improve energy efficiency, as well as to introduce them in the future to less successful branches.

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Yao, Dongxue, Lingling Gu, Bin Zuo, Shuo Weng, Shengwei Deng, and Weiju Hao. "A strategy for preparing high-efficiency and economical catalytic electrodes toward overall water splitting." Nanoscale 13, no. 24 (2021): 10624–48. http://dx.doi.org/10.1039/d1nr02307a.

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Ibrahim, Mustapha D., Fatima A. S. Binofai, and Maha O. A. Mohamad. "Transition to Low-Carbon Hydrogen Energy System in the UAE: Sector Efficiency and Hydrogen Energy Production Efficiency Analysis." Energies 15, no. 18 (September 13, 2022): 6663. http://dx.doi.org/10.3390/en15186663.

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To provide an effective energy transition, hydrogen is required to decarbonize the hard-to-abate industries. As a case study, this paper provides a holistic view of the hydrogen energy transition in the United Arab Emirates (UAE). By utilizing the directional distance function undesirable data envelopment analysis model, the energy, economic, and environmental efficiency of UAE sectors are estimated from 2001 to 2020 to prioritize hydrogen sector coupling. Green hydrogen production efficiency is analyzed from 2020 to 2050. The UAE should prioritize the industry and transportation sectors, with average efficiency scores of 0.7 and 0.74. The decomposition of efficiency into pure technical efficiency and scale efficiency suggests policies and strategies should target upscaling the UAE’s low-carbon hydrogen production capacity to expedite short-term and overall production efficiency. The findings of this study can guide strategies and policies for the UAE’s low-carbon hydrogen transition. A framework is developed based on the findings of the study.

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Pakere, Ieva, Toms Prodanuks, Agris Kamenders, Ivars Veidenbergs, Stefan Holler, Agnese Villere, and Dagnija Blumberga. "Ranking EU Climate and Energy Policies." Environmental and Climate Technologies 25, no. 1 (January 1, 2021): 367–81. http://dx.doi.org/10.2478/rtuect-2021-0027.

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Abstract The European Union (EU) has set ambitious targets to increase the overall energy efficiency and decrease the environmental impact by introducing the ‘Green Deal.’ It is an EU plan for the transition to zero greenhouse gas emissions. The overall data analyses of GHG emissions per capita and GDP value in different EU countries show that the GDP increase in 2010–2017 has not increased GHG emissions. Therefore, the link between the GDP increase through energy resource usage increase has been eliminated. However, not all of the EU 27 member states contributed to the overall EU green policy equally. The article presents the methodology for the energy and environmental performance status analyses by evaluating nine different indicators (share of renewable energy, greenhouse gases per GDP, energy intensity, primary efficiency, industry efficiency, energy consumption in households, space heating efficiency, pollutant emissions from transport and specific energy consumption of transport sector) for EU member states. Indicators have been tested through correlation analyses. The use of multidimensional Energy and climate policy indicator has been proposed to rank the performance of different EU countries. The results show that the countries with the highest score in climate and energy indicator values are Sweden, Denmark, Latvia, Austria, Finland, Ireland, and Lithuania. The lowest obtained values are Bulgaria, Poland, Hungary, the Czech Republic, and France.

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Purnell, Ken, Mark Sinclair, and Anna Gralton. "Sustainable Schools: Making Energy Efficiency a Lifestyle Priority." Australian Journal of Environmental Education 20, no. 2 (2004): 81–91. http://dx.doi.org/10.1017/s0814062600002226.

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AbstractPromoting efficient energy use in schools that consequently reduces greenhouse gas emissions is the purpose of a residential Energy Efficiency in Schools (EEIS) program reported on in this paper. Research on this program aligns with one of the “key overarching sustainability issues”, set out in the Learning for Sustainability: NSW Environmental Education Plan 2002-2005: “Sustaining energy use, cutting greenhouse gases”. The EEIS program was sponsored by Queensland EPA, Ergon Energy and Education Queensland. Participants learnt about innovation, leadership, coal mining, greenhouse issues, the “greenhouse challenge”, conducting energy audits, alternative energy and promoting energy efficient practices in school and the community.Three EEIS models in Queensland that supported change in energy usage behaviours of participants (school students, parents and staff) is examined. In each of the models, interviews were conducted and questionnaires were completed with participants. In Model 1 it was found that, overall; the EEIS program did develop positive energy efficient behaviours in those who participated. In relation to whole school effects, mixed results were obtained. In Model 1 a rural school initially reduced energy consumption by fifty percent and in Model 2 significant changes in energy efficient behaviours in the school communities occurred. In Model 3 one school followed through an action plan and similar positive effects were observed. The development of an action plan that is implemented in the school, the selection of suitable participants, and post-program visits to schools by relevant staff were among the factors that contributed to the overall success. Each model was found to have achieved their aims to varying degrees but had outcomes that are likely to have both lifetime and possibly intergenerational effects.

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Banaszek, Andrzej, Radovan Petrović, Maja Andjelković, and Milan Radosavljević. "Comparative Analysis of the Overall Efficiency of a Hydraulic Pump Unit with and without a Separate Pre-Charging System." Energies 16, no. 5 (February 24, 2023): 2201. http://dx.doi.org/10.3390/en16052201.

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The overall efficiency and energy consumption problem in hydraulic power pack units with and without an additional pre-charging system was analyzed in this paper. A theoretical mathematical model was developed for calculating energy losses in both pump unit structures. To verify the theoretical relationships, a laboratory test stand was built, upon which the results of calculating the overall efficiency were compared with the results of the laboratory tests. Universal diagrams of the overall efficiency dependence as a function of pressure load and geometric adjustment of the main pump’s working volume were created for the case of a particular hydraulic pump unit without and with a pre-charging system. Based on this, discussions were carried out on whether and the way in which the additionally pre-charging system affects the parameters of the overall efficiency characteristics of the researched pump unit. Additionally, the dependence of the optimal pressure load and the maximum overall efficiency of the pump unit on the geometric adjustment of the main pump’s working volume was analyzed. It was shown that the pre-charging system affects the increase in the optimal pressure load at which the most favorable operating conditions, in terms of energy consumption, are obtained for the researched hydraulic pump unit.

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Ritosa, K., I. De Jaeger, D. Saelens, and S. Roels. "A probabilistic approach to include the overall efficiency of gas-fired heating systems in urban building energy modelling." Journal of Physics: Conference Series 2069, no. 1 (November 1, 2021): 012105. http://dx.doi.org/10.1088/1742-6596/2069/1/012105.

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Abstract Urban building energy modelling has an essential role in the estimation of energy demand at urban or neighbourhood scales. However, current modelling methods have limitations in reproducing realistic gross energy usage. Although it is theoretically possible to simulate all components of the heating system in detail, such an extensive approach significantly increases the computational effort, prohibiting a large scale probabilistic analysis. As an alternative, this paper presents a simplified data-driven approach to estimate the overall efficiency for the six most occurring gas-fired heating system configurations in Flemish single-family dwellings. For all configurations, efficiencies of emission, distribution, production, control and storage components are taken into account, of which the efficiency of the production unit is modelled most in detail as it includes the load-dependency. The approach is applied to a sample of 20 dwellings reflecting realistic variation in size, insulation quality and occupancy schedules. For all dwellings and the different heating systems the resulting annual production efficiency, and monthly heating systems’ efficiency as a function of gross energy demand are shown based on the 25th, 50th and 75th percentile.

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Salonitis, Konstantinos. "Energy efficiency assessment of grinding strategy." International Journal of Energy Sector Management 9, no. 1 (April 7, 2015): 20–37. http://dx.doi.org/10.1108/ijesm-04-2013-0009.

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Purpose – This paper aims to set the framework for measuring the energy performance of a manufacturing process. The availability and affordability of energy is becoming a critical parameter nowadays, affecting the whole lifecycle of the product, and hence the production phase as well. The energy efficiency of the grinding process, as a widely used manufacturing process in the industry, is assessed with regard to the selected process strategies. Design/methodology/approach – To assess the grinding machine tool energy performance, a measuring framework is designed, implemented and validated. The process strategy effect on the energy consumption is experimentally assessed through energy audits of the grinding machine tool. Such energy audits provide better insights into the way subsystems composing a machine tool affect the energy consumption. Findings – It is revealed that the proper selection of process strategy can significantly reduce the energy consumption. The amount of energy consumed for the actual process is less than the energy required for maintaining the processing environment (e.g. for the coolant pump delivering coolant fluid in the processing area). The key finding is that the measuring framework can be used for the understanding and analysis of the energy consumption of the various machine tool components. Additionally, for the grinding process itself, the energy audits indicate that reducing the processing duration can significantly reduce the overall energy. Originality/value – The main novel contribution of the present paper is the development of a measurement framework for assessing the energy consumption of subsystems running simultaneously when processing a workpiece. Grinding process energy demand is analysed in detail, allowing for the first time to consider energy consumption as a manufacturing decision criterion.

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Lenzi, C., C. Bragalli, A. Bolognesi, and S. Artina. "From energy balance to energy efficiency indicators including water losses." Water Supply 13, no. 4 (August 1, 2013): 889–95. http://dx.doi.org/10.2166/ws.2013.103.

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The collection and distribution of drinking water resources generally require large quantities of energy, that vary according to factors related to the characteristics of the served area, as well as to design and management choices. Energy intensity indicators (energy per unit of volume) are insufficient to assess the weight of different factors that affect the energy consumption and appear not suitable for the comparison of different water supply systems. The key step of this work is to define a methodology for assessing the energy efficiency of water supply systems. In particular, water losses in water distribution systems, generally assessed in relation to the quantity of high quality water dispersed in the environment, are herein considered in relation to their energy content. In addition to the evaluation of energy balance using the approach proposed by Enrique Cabrera et al. in ‘Energy audit of water networks’ (see J. Water Res. Plan. Manage.136 (6), 669–677) an overall efficiency indicator WSEE (Water Supply Energy Efficiency) is then proposed. Its decomposition finally leads to the definition of further indicators, which may help to assess how the structure of the network, leakage rate and/or pumps affect the energy efficiency of the water system. Such indicators can be used to compare different water supply systems and to identify the impact of individual interventions. The proposed energy analysis was applied to two case studies in Northern Italy.

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Salamah, M., and A. O. Oyedeji. "Regional-Based LEACH For Energy Efficiency In Wsns." International Research Journal of Electronics and Computer Engineering 2, no. 2 (June 15, 2016): 7. http://dx.doi.org/10.24178/irjece.2016.2.2.07.

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Network lifetime and throughput are the major considerations for determining the overall performance of a wireless sensor network (WSN). There have been various protocols proposed based on Hierarchical Clustering to improve network lifetime. The proposed Regional-Based LEACH is a centralized cluster-based protocol for extending the stability period of the WSNs. This protocol aims to accomplish better energy efficiency by dividing the sensing field into sub-regions and selects Cluster Heads for each region based on their residual energy along with the incorporation of Base station mobility. This leads to a relatively uniform energy consumption and residual energy level among the nodes in a region leading to an extended stability period.

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Tudoran, Cristian, Stefan Albert, Dorin N. Dadarlat, Carmen Tripon, and Sorin Dan Anghel. "Smart metering application for power efficiency studies." International Journal of Engineering & Technology 4, no. 1 (January 10, 2015): 78. http://dx.doi.org/10.14419/ijet.v4i1.4154.

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Improving the energy efficiency of our Institute’s data center is an ambitious challenge for our research teams. Understanding how the energy is consumed in each segment of the system becomes fundamental in order to minimize the overall energy consumed by the system itself. In this paper, we propose an experimentally–driven approach to develop a simple and accurate power consumption and temperature monitoring system. In this work we focused our attention on the monitoring, measurement of the energy consumption patterns of our data center system, at INCDTIM Cluj-Napoca, Romania.

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Huang, Bowen, Yamin Zhou, Zihao Zeng, Wuyin Zhang, Zhenfeng Xiao, Yuanfu Tang, Zhichao Zhang, and Chenyi Ge. "Energy Efficiency Evaluation for Battery Energy Storage Stations Based on AHP-TOPSIS." Journal of Physics: Conference Series 2614, no. 1 (October 1, 2023): 012010. http://dx.doi.org/10.1088/1742-6596/2614/1/012010.

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Abstract The development of energy storage is a necessary support for the realization of the green energy future. At present, battery energy storage stations (BESSs) consume large amounts of energy, the energy loss relationships between various devices in a station are complex, and there is a lack of energy loss analysis and statistical methods for BESSs. It poses challenges to the further development of BESSs in the power grid. To deal with this issue, this paper establishes the energy loss indicators and proposes the energy loss evaluation methods for BESSs. The simulation results verify that the proposed method can accurately reflect the overall energy loss level of the BESSs and the proposed method of energy loss estimation and analysis can support the development of energy saving and loss reduction.

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Fidan, Ismail, Vivekanand Naikwadi, Suhas Alkunte, Roshan Mishra, and Khalid Tantawi. "Energy Efficiency in Additive Manufacturing: Condensed Review." Technologies 12, no. 2 (February 5, 2024): 21. http://dx.doi.org/10.3390/technologies12020021.

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Today, it is significant that the use of additive manufacturing (AM) has growing in almost every aspect of the daily life. A high number of sectors are adapting and implementing this revolutionary production technology in their domain to increase production volumes, reduce the cost of production, fabricate light weight and complex parts in a short period of time, and respond to the manufacturing needs of customers. It is clear that the AM technologies consume energy to complete the production tasks of each part. Therefore, it is imperative to know the impact of energy efficiency in order to economically and properly use these advancing technologies. This paper provides a holistic review of this important concept from the perspectives of process, materials science, industry, and initiatives. The goal of this research study is to collect and present the latest knowledge blocks related to the energy consumption of AM technologies from a number of recent technical resources. Overall, they are the collection of surveys, observations, experimentations, case studies, content analyses, and archival research studies. The study highlights the current trends and technologies associated with energy efficiency and their influence on the AM community.

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