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1. Industrial structure, technological innovation, and total-factor energy efficiency in China

Author:
Yu, Binbin
Source:
Environmental science and pollution research international 2020 v.27 no.8 pp. 8371-8385
ISSN:
0944-1344
Subject:
energy efficiency,   etc   ; models; technology; China;     Show all 4 Subjects
Abstract:
... The promotion of industrial restructuring and technological innovation is the most important and realistic way of improving energy efficiency. This thesis uses the modified Super-SBM method to measure China’s total-factor energy efficiency and then uses the dynamic spatial panel model (DSPM) to verify the effect of industrial structure and technological innovation on total-factor energy efficiency ...
DOI:
10.1007/s11356-019-07363-5

2. Energy efficiency as manifestation of collective intelligence in human societies

Author:
Wasniewski, Krzysztof
Source:
Energy 2020 v.191 pp. 116500
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; capital; sexual selection;     Show all 3 Subjects
Abstract:
... This article attempts to assess the real capacity of national economies to optimize their energy efficiency, measured as real output per unit of energy consumed. National economies are assumed to be collective intelligences, striving to optimize a set of values, including energy efficiency. A set of 59 countries has been studied in this respect over the period 1990–2014, with the use of a multi-la ...
DOI:
10.1016/j.energy.2019.116500

3. Evaluation of driving performance and energy efficiency for a novel full hybrid system with dual-motor electric drive and integrated input- and output-split e-CVT

Author:
Chung, Cheng-Ta; Wu, Chien-Hsun; Hung, Yi-Hsuan
Source:
Energy 2020 v.191 pp. 116508
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; sports; vehicles (equipment);     Show all 3 Subjects
Abstract:
... This paper presents a novel full hybrid electric vehicle (HEV) with power split electronic-continuously variable transmission (e-CVT) capable of providing dual-motor drive at purely electric drive and operating under either the input-split or output-split mode at hybrid drive. This powertrain consists of one engine, one motor, and one generator with a specific mechanical link among two planetary g ...
DOI:
10.1016/j.energy.2019.116508

4. Research on energy consumption of injection molding machine driven by five different types of electro-hydraulic power units

Author:
Liu, He; Zhang, Xiaogang; Quan, Long; Zhang, Hongjuan
Source:
Journal of cleaner production 2020 v.242 pp. 118355
ISSN:
0959-6526
Subject:
energy efficiency,   etc   ; equipment; injection molding;     Show all 3 Subjects
Abstract:
... Injection molding machines consume a large amount of energy in the production process, during which the power units are the most significant factor. In order to understand the energy consumption of injection molding machines driven by different types of electro-hydraulic power units, the energy efficiencies of the asynchronous motor, the servo motor and the hydraulic pump under different working c ...
DOI:
10.1016/j.jclepro.2019.118355

5. Energy improvement of fineblanking press by valve-pump combined controlled hydraulic system with multiple accumulators

Author:
Xu, Zhicheng; Liu, Yanxiong; Hua, Lin; Zhao, Xinhao; Wang, Xiaokai
Source:
Journal of cleaner production 2020 v.257 pp. 120505
ISSN:
0959-6526
Subject:
energy efficiency,   etc   ; energy conservation; presses; simulation models;     Show all 4 Subjects
Abstract:
... To improve the useful energy efficiency of a hydraulic fine-blanking press (HFBP), a hydraulic system using a combined valve-pump combined with multiple accumulators and comprising a valve-controlled circuit and pump-controlled circuit, was presented based on the working-process load characteristics. By adopting multiple accumulators, the slide block mechanical energy was recycled and the system d ...
DOI:
10.1016/j.jclepro.2020.120505

6. Designing a robust index for WWTP energy efficiency: The ENERWATER water treatment energy index

Author:
Mauricio-Iglesias, Miguel; Longo, Stefano; Hospido, Almudena
Source:
The Science of the total environment 2020 v.713 pp. 136642
ISSN:
0048-9697
Subject:
energy efficiency,   etc   ; algorithms; uncertainty; wastewater treatment;     Show all 4 Subjects
Abstract:
... The development and use of composite indexes has exploded in the last 15 years as a tool to summarise the large amount of information available nowadays. To ensure that composite indicators reflect faithfully the purpose of evaluation and are widely accepted and used, the users must understand the relationship between individual sub-indicators and the result (transparency) and the evaluation shoul ...
DOI:
10.1016/j.scitotenv.2020.136642

7. Multi-objective planning for integrated energy systems considering both exergy efficiency and economy

Author:
Hu, Xiao; Zhang, Heng; Chen, Dongwen; Li, Yong; Wang, Li; Zhang, Feng; Cheng, Haozhong
Source:
Energy 2020 v.197 pp. 117155
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; exergy; models; planning; China;     Show all 5 Subjects
Abstract:
... Improving the comprehensive utilization level of energy has been a core goal for the optimal design of the integrated energy system (IES), which requires an accurate assessment of energy efficiency. The widely used criterion of conventional energy efficiency derived from the first law of thermodynamics has gradually been criticized for its shortcomings of neglecting the quality of energy. As a con ...
DOI:
10.1016/j.energy.2020.117155

8. Regional difference in global unified efficiency of China—Evidence from city-level data

Author:
Liu, Kui; Lu, Suying; Zhang, Guanglu
Source:
The Science of the total environment 2020 v.713 pp. 136355
ISSN:
0048-9697
Subject:
energy efficiency,   etc   ; emissions; energy conservation; China;     Show all 4 Subjects
Abstract:
... As the world's most energy-consuming and carbon-emitting country, China faces enormous pressures on energy conservation and emission reduction, and improving energy efficiency is one of the most important ways to save energy and reduce emissions. Using the city-level panel data in China during 2013–2017, we apply the global non-radial directional distance function (NDDF) to estimate the global uni ...
DOI:
10.1016/j.scitotenv.2019.136355

9. Systematic investigation of building energy efficiency standard and hot water preparation systems’ influence on the heat load profile of districts

Author:
Best, Isabelle; Braas, Hagen; Orozaliev, Janybek; Jordan, Ulrike; Vajen, Klaus
Source:
Energy 2020 v.197 pp. 117169
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; buildings; heat; models; temperature;     Show all 5 Subjects
Abstract:
... Heat load profiles of new residential developments in rural, sub-urban, and urban context were generated by means of a generic model and dynamic simulations. The combined effect of district building density, building energy efficiency standard, and hot water preparation system on the heat load is discussed in detail. Hundred residential districts representing medium sized developments were defined ...
DOI:
10.1016/j.energy.2020.117169

10. Correction to: Reaching the sustainable development goals 2030: energy efficiency as an approach to corporate social responsibility (CSR)

Author:
Nurunnabi, Mohammad; Esquer, Javier; Munguia, Nora; Zepeda, David; Perez, Rafael; Velazquez, Luis
Source:
GeoJournal 2020 v.85 no.2 pp. 375-378
ISSN:
0343-2521
Subject:
energy efficiency,   etc   ; corporate social responsibility; sustainable development;     Show all 3 Subjects
Abstract:
... In the original publication, there is a mistake in the order of all figures. The correct version is given in this article. ...
DOI:
10.1007/s10708-019-10012-6

11. Modeling of pollutant distribution based on mobile sensor networks

Author:
Wang, Yong; Wang, Yingbin; Zhang, Xiangli; Wang, Dianhong; Yan, Jun
Source:
Environmental science and pollution research international 2020 v.27 no.10 pp. 11413-11424
ISSN:
0944-1344
Subject:
energy efficiency,   etc   ; models; monitoring; pollutants; pollution;     Show all 5 Subjects
Abstract:
... Pollution monitoring based on wireless sensor networks is becoming highly attractive. This paper presents an effective pollutant distribution modeling approach using a mobile sensor network. As for mobile nodes, energy consumption and link quality between nodes are two key factors. In the proposed approach, we present an autonomous sensing model and an energy-driven motion control scheme, which ca ...
DOI:
10.1007/s11356-020-07684-w

12. Limited effects of a redox mediator in lithium–oxygen batteries: indecomposable by-products

Author:
Kim, Hun; Kwak, Won-Jin; Jung, Hun-Gi; Sun, Yang-Kook
Source:
Journal of materials chemistry A 2020 v.8 no.11 pp. 5622-5628
ISSN:
2050-7496
Subject:
energy efficiency,   etc   ; cathodes; chemistry; lithium batteries;     Show all 4 Subjects
Abstract:
... Redox mediators have been studied intensively to improve the energy efficiency and cycle life of lithium–oxygen batteries by facilitating the decomposition of the discharge product (lithium peroxide), thus reducing the side reactions at a high potential during charging. Nevertheless, the cycling performance of lithium–oxygen batteries with redox mediators is unsatisfactory; this problem must be re ...
DOI:
10.1039/c9ta13612f

13. Effective Control of Vapor Recompression-Assisted Dividing Wall Column with a Middle Partition

Author:
Gao, Lianrui; Xu, Lianghua; Yin, Xiaohong; Xia, Ming; Yuan, Xigang
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.13 pp. 6112-6122
ISSN:
1520-5045
Subject:
energy efficiency,   etc   ; distillation; process design; temperature; vapors;     Show all 5 Subjects
Abstract:
... Vapor recompression-assisted dividing wall columns (VRC-DWCs) with a middle partition have been shown to have a higher energy efficiency compared to conventional DWCs. However, the controllability of this highly integrated process remains as a challenging issue since all of the benefits of a VRC-DWC are reasonable only under good dynamic controllability. Compared to the control of the vapor recomp ...
DOI:
10.1021/acs.iecr.9b06644

14. Energy efficiency modeling and validation of a novel swash plate-rotating type hydraulic transformer

Author:
Zhou, Junjie; Jing, Chongbo; Wu, Wei
Source:
Energy 2020 v.193 pp. 116652
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; churning; friction; mathematical models;     Show all 4 Subjects
Abstract:
... This paper reports a mathematical model and an experimental validation for the efficiency of a new type of hydraulic transformer, which utilizes a new structure of rotating swash plate. Such a type allows the valve plate being fixed without relative movement to the 3 pressure ports, reducing the throttling loss. An efficiency model is derived accounting for the leakage loss, friction loss and chur ...
DOI:
10.1016/j.energy.2019.116652

15. A novel data envelopment analysis cross-model integrating interpretative structural model and analytic hierarchy process for energy efficiency evaluation and optimization modeling: Application to ethylene industries

Author:
Han, Yongming; Zhou, Rundong; Geng, Zhiqiang; Bai, Ju; Ma, Bo; Fan, Jinzhen
Source:
Journal of cleaner production 2020 v.246 pp. 118965
ISSN:
0959-6526
Subject:
energy efficiency,   etc   ; ethylene; ethylene production; industry; models;     Show all 5 Subjects
Abstract:
... Energy efficiency analysis and production efficiency improvement are effective ways to promote the sustainable and stable development of ethylene industries. Therefore, this paper proposes novel data envelopment analysis cross-model integrated interpretative structural model and analytic hierarchy process for energy efficiency evaluation and optimization modeling. The interpretative structural mod ...
DOI:
10.1016/j.jclepro.2019.118965

16. An intelligent braking system composed single-pedal and multi-objective optimization neural network braking control strategies for electric vehicle

Author:
He, Hongwen; Wang, Chen; Jia, Hui; Cui, Xing
Source:
Applied energy 2020 v.259 pp. 114172
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; algorithms; electric vehicles; energy recovery;     Show all 4 Subjects
Abstract:
... The braking system is significant to improve the total energy efficiency and ensure driving security of electric vehicles. An intelligent braking system (IBS) composed single-pedal and multi-objective optimization neural network braking control strategies is proposed in this paper to improve the energy economy, braking stability and driving intelligence for electric vehicles. The braking operation ...
DOI:
10.1016/j.apenergy.2019.114172

17. Investigation on specific milling energy and energy efficiency in high-speed milling based on energy flow theory

Author:
Zhang, Tao; Liu, Zhanqiang; Sun, Xiaodong; Xu, Jixiang; Dong, Longlong; Zhu, Genglei
Source:
Energy 2020 v.192 pp. 116596
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; cutting; manufacturing; milling; models;     Show all 5 Subjects
Abstract:
... Manufacturing energy consumption affects both the environment and manufacturing costs. Therefore, evaluating the energy consumption of the metal cutting processes is required. Accordingly, the idle power and total power were separately measured with a multimeter. A mechanical milling force model was constructed and validated by high-speed milling experiments with the dynamometer. The specific mill ...
DOI:
10.1016/j.energy.2019.116596

18. The inequality of city-level energy efficiency for China

Author:
Zhang, Ning; Zhou, Mengling
Source:
Journal of environmental management 2020 v.255 pp. 109843
ISSN:
0301-4797
Subject:
energy efficiency,   etc   ; cities; empirical research; geography; China;     Show all 5 Subjects
Abstract:
... This paper proposes a new methodology for measuring energy efficiency inequality based on the Shephard energy distance function and the “double” stochastic meta-frontier. To incorporate the regional inequality, we use three different grouping criteria, geography, city features, and strategic development goals. We also explore whether the different city grouping criteria can influence the energy ef ...
DOI:
10.1016/j.jenvman.2019.109843

19. Correction: An effective surface modification strategy with high reproducibility for simultaneously improving efficiency and stability of inverted MA-free perovskite solar cells

Author:
Zhu, Hongmei; Wu, Shaohang; Yao, Jiaxu; Chen, Rui; Pan, Ming; Chen, Weitao; Zhou, Jing; Zhang, Wenjun; Wang, Tao; Chen, Wei
Source:
Journal of materials chemistry A 2020 v.8 no.4 pp. 2148
ISSN:
2050-7496
Subject:
energy efficiency,   etc   ; solar cells; solar energy;     Show all 3 Subjects
Abstract:
... Correction for ‘An effective surface modification strategy with high reproducibility for simultaneously improving efficiency and stability of inverted MA-free perovskite solar cells’ by Hongmei Zhu et al., J. Mater. Chem. A, 2019, 7, 21476–21487. ...
DOI:
10.1039/d0ta90011g

20. Energy and exergy analysis of a combined Brayton/Brayton power cycle with humidification

Author:
Mossi Idrissa, A.K.; Goni Boulama, K.
Source:
International journal of green energy 2020 v.17 no.2 pp. 149-156
ISSN:
1543-5083
Subject:
energy efficiency,   etc   ; air; combustion; exergy; humidification; temperature;     Show all 6 Subjects
Abstract:
... First and second law approaches have been used to analyze the performance of a humidified Brayton/Brayton power cycle. The energy efficiency and exergy destruction rates consistently improved when the combustion temperature was increased. Both performance indicators improved, reached an optimum, and then deteriorated when the topping cycle pressure ratio increased, while their sensitivity to the b ...
DOI:
10.1080/15435075.2019.1708367