Article
Green & Sustainable Science & Technology
Fairuz Suzana Mohd Chachuli, Norasikin Ahmad Ludin, Muhamad Alias Md Jedi, Norul Hisham Hamid
Summary: Using DEA and MI methods, this study evaluates the impact of renewable energy policy transitions on efficiency and social benefits in Malaysia, with results showing the highest efficiency in East Malaysia, fluctuations in renewable energy efficiency during policy transitions, and significant social benefits created in the solar photovoltaic industry.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Operations Research & Management Science
Rolf Fare, Valentin Zelenyuk
Summary: Sequential DEA is a new class of DEA modeling that allows for analyzing the efficiency of decision-making units consisting of a series of sub-DMUs. Embedded in the Hilbert sequence space, it can accommodate different numbers of sub-DMUs and inputs/outputs.
ANNALS OF OPERATIONS RESEARCH
(2021)
Article
Energy & Fuels
Junwen Yang, Bin Chen
Summary: This study evaluated the energy efficiency of municipal wastewater treatment plants in China using data envelopment analysis, revealing regional differences in energy efficiency and pollutant emissions levels. It emphasizes the importance of increasing technical efficiency in wastewater treatment industries.
Article
Green & Sustainable Science & Technology
Bahram Fathi, Malihe Ashena, Ali Reza Bahari
Summary: The study examines the energy, environmental, and economic (E3) efficiency in fossil fuel exporting countries during 2015-2017. The DEA approach shows different efficiency performances in each country, while the Nash bargaining game-DEA model ranks China, Oman, and others as top performers and Gabon, Saudi Arabia, and others as low performers. The second model is considered more suitable for ranking due to its unique solution.
SUSTAINABLE PRODUCTION AND CONSUMPTION
(2021)
Article
Energy & Fuels
Gloria Rodriguez-Lozano, Michael Cifuentes-Yate
Summary: This study evaluates the efficiency of electricity generation from renewable and non-renewable energy sources in 126 countries from 2000 to 2016. The results show that many countries are efficient in electricity production, with Oceanian countries performing the best among evaluated countries.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Mathematics
Kaiyang Zhong, Chenglin Li, Qing Wang
Summary: This article strengthens the method of evaluating corporate innovation efficiency by introducing the black box theory and production function theory, highlighting the challenges faced by rural commercial banks in innovation. It provides a reference for improving the analysis of the DEA method.
Article
Economics
Ximei Zeng, Zhongbao Zhou, Yeming Gong, Wenbin Liu
Summary: The study proposes a method to adjust the energy mix to significantly increase the proportion of renewable energies and reduce carbon emission without increasing other inputs. By constructing an energy portfolio and utilizing a data envelopment analysis model, the optimal energy mix adjustment plan is obtained, leading to a 24.54% reduction in carbon emissions in the power industry.
SOCIO-ECONOMIC PLANNING SCIENCES
(2022)
Article
Business
Reza Kiani Mavi, Neda Kiani Mavi, Reza Farzipoor Saen, Mark Goh
Summary: This study develops a common set of weights (CSW) model to analyze the energy efficiency of OECD countries and suggests that increasing renewable energy consumption and reducing waste and CO2 emissions are important for combating climate change. The CSW model identifies Iceland as the most renewable energy-efficient country in the OECD, followed by Luxemburg and Norway.
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2022)
Article
Green & Sustainable Science & Technology
Alireza Khoshroo, Mohammad Izadikhah, Ali Emrouznejad
Summary: The study evaluates the energy efficiency of tomato production in Iran using the Data Envelopment Analysis (DEA) model with the Bounded Adjusted Measure (BAM), assessing overall, environmental, production, and pure emission efficiency. Nine provinces are identified as overall efficient, with an additional nine DMUs recognized for their environmental, production, and pure emission efficiency. Additionally, a new approach for determining congestion based on the BAM model is proposed to measure excessive investments in inputs for increased outputs.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Operations Research & Management Science
Feng Li, Han Wu, Qingyuan Zhu, Liang Liang, Gang Kou
Summary: This study considers reciprocal behaviors among DMUs, determines positive or negative behaviors using a novel threshold, and develops a game-like iteration process to adjust evaluation strategies. The optimal ultimate cross efficiency score with reciprocal behaviors is then calculated.
ANNALS OF OPERATIONS RESEARCH
(2021)
Article
Environmental Sciences
Yi Qu, Aizhi Li, Shen Zhong
Summary: Studying the economic efficiency of freshwater fishery breeding is important for the sustainable utilization of freshwater fishery resources. This study evaluates the total factor productivity of freshwater fishery breeding in China using a nonparametric research method, combining the super-SBM data envelopment analysis (DEA) model with the global Malmquist index (GMI). The findings show that FTFP in China has reached an effective level but lacks breakthrough value, and there are significant spatial differences in FTFP.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Computer Science, Interdisciplinary Applications
Shih-Pin Chen, Chung-Wei Chang
Summary: This paper evaluates the relative efficiency of academic departments at National Chung Cheng University in Taiwan using data envelopment analysis (DEA) and the concept of an assurance region. The results provide department heads with improvement directions and serve as a reference for resource allocation and future strategy development for the university administration.
Article
Operations Research & Management Science
Shiang-Tai Liu, Yueh-Chiang Lee
Summary: The cross-efficiency evaluation measures the efficiencies of decision-making units through self- and peer-evaluation methods. The existing approaches of fuzzy cross-efficiency evaluation employ the secondary goal approach to determine weights, which may lead to different results. This paper proposes a novel method that considers all possible weights to calculate the fuzzy cross-efficiency directly, without requiring the choice of weights.
ANNALS OF OPERATIONS RESEARCH
(2021)
Review
Energy & Fuels
Tripti Mishra, Ujjwal Kumar, Kusum Arunanchalam, Vijay Sridhar
Summary: The study evaluated the efficiency of state-owned electric utility facilities in Uttarakhand state of India from 2009 to 2019, finding that some Electricity Distribution Divisions had low technical efficiency. However, an improvement trend was noted with rearrangement of divisions from 2015 to 2017. Recommendations and policies should consider geographical location for more efficient power supply.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Chemistry, Physical
Fatemeh Rostami, Zoltan Kis, Rembrandt Koppelaar, Laureano Jimenez, Carlos Pozo
Summary: This study compares the sustainability of 27 energy storage alternatives, which is important for the transition to energy systems with a high share of renewable energy. The results provide guidance for decision-making and research and development purposes.
ENERGY STORAGE MATERIALS
(2022)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.