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1. Application of the second law of thermodynamics to control: A review

Author:
Sangi, Roozbeh; Müller, Dirk
Source:
Energy 2019 v.174 pp. 938-953
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; entropy; equations; exergy;     Show all 4 Subjects
Abstract:
... The development of recently-designed energy efficient components and complex energy concepts has heightened the need to develop advanced control strategies. Exergy-based control strategies are among the recently introduced control strategies, which apply the second law of thermodynamics to control. Exergy is defined as the maximum available work that can be extracted from a system during a process ...
DOI:
10.1016/j.energy.2019.03.024

2. Energy Efficiency of Capacitive Deionization

Author:
Wang, Li; Dykstra, J. E.; Lin, Shihong
Source:
Environmental science & technology 2019 v.53 no.7 pp. 3366-3378
ISSN:
1520-5851
Subject:
energy efficiency,   etc   ; deionization; desalination; electrochemistry;     Show all 4 Subjects
Abstract:
... Capacitive deionization (CDI) as a class of electrochemical desalination has attracted fast-growing research interest in recent years. A significant part of this growing interest is arguably attributable to the premise that CDI is energy efficient and has the potential to outcompete other conventional desalination technologies. In this review, systematic evaluation of literature data reveals that ...
DOI:
10.1021/acs.est.8b04858

3. Life cycle energy efficiency evaluation for coal development and utilization

Author:
Wang, Ning; Shen, Ruifang; Wen, Zongguo; De Clercq, Djavan
Source:
Energy 2019 v.179 pp. 1-11
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; coal; models; transportation; China;     Show all 5 Subjects
Abstract:
... The energy conversion efficiency of coal utilization is a focal point in modern energy management practices and in academic literature. This paper explores life cycle energy efficiency of coal (LEEC), which encompasses six distinct stages from the design of coal mines to the comprehensive reuse of resources. First, the study analyzes improvements to the evaluation of efficiencies in energy systems ...
DOI:
10.1016/j.energy.2019.04.111

4. A multi-objective iterated local search algorithm for comprehensive energy-aware hybrid flow shop scheduling

Author:
Schulz, Sven; Neufeld, Janis S.; Buscher, Udo
Source:
Journal of cleaner production 2019 v.224 pp. 421-434
ISSN:
0959-6526
Subject:
energy efficiency,   etc   ; algorithms; energy costs; industry; models;     Show all 5 Subjects
Abstract:
... Growing environmental awareness and the relevance of energy costs in many industries has led to the need of improving energy efficiency in operations management; hence, energy-aware scheduling (EAS) has grown in importance. In EAS three basic strategies can be identified. First, a large part of research activities is aimed at reducing energy consumption; second, energy costs can be reduced by maki ...
DOI:
10.1016/j.jclepro.2019.03.155

5. Energy efficiency improvement of heavy-load mobile hydraulic manipulator with electronically tunable operating modes

Author:
Ding, Ruqi; Zhang, Junhui; Xu, Bing; Cheng, Min; Pan, Min
Source:
Energy conversion and management 2019 v.188 pp. 447-461
ISSN:
0196-8904
Subject:
energy efficiency,   etc   ; actuators; energy conservation; potential energy;     Show all 4 Subjects
Abstract:
... The conventional hydraulic drive system for a heavy-load mobile manipulator is usually operated under single mode, such that both inlet/outlet and potential energy losses are large to lower the energy efficiency. In this paper, a novel electro-hydraulic drive system is presented to improve energy efficiency. Extended control degrees of freedom are obtained utilizing the independent metering valve ...
DOI:
10.1016/j.enconman.2019.03.023

6. Membranes Fabricated by Solvent treatment for Flow Battery: Effects of initial structures and intrinsic properties

Author:
Lu, Wenjing; Zhang, Huamin; Li, Xianfeng
Source:
Journal of membrane science 2019 v.577 pp. 212-218
ISSN:
0376-7388
Subject:
energy efficiency,   etc   ; artificial membranes; batteries; solvents; thermoplastics;     Show all 5 Subjects
Abstract:
... Solvent treatment has been proved to be a very simple and effective method to prepare high-performance porous membranes for flow batteries. However, the initial morphology and the properties of membrane materials will exert pivotal effects on the resultant performance of porous membranes. In this paper, according to comparing the differences in the morphology and performance of untreated and treat ...
DOI:
10.1016/j.memsci.2019.02.011

7. Flow field design pathways from lab-scale toward large-scale flow batteries

Author:
Sun, Jie; Zheng, Menglian; Yang, Zhongshu; Yu, Zitao
Source:
Energy 2019 v.173 pp. 637-646
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; batteries; commercialization; models; vanadium;     Show all 5 Subjects
Abstract:
... Current demonstration projects show that the power capacity of redox flow batteries can span a large range from kW- to MW-scale. The large-scale, especially MW-scale, flow battery system can usually benefit from cell's large active area, due to that a large cell can reduce the required number of cells and thus assembling difficulties. However, the lack of practical pathways for scaling-up lab-scal ...
DOI:
10.1016/j.energy.2019.02.107

8. Optimization of local porosity in the electrode as an advanced channel for all-vanadium redox flow battery

Author:
Yoon, Sang Jun; Kim, Sangwon; Kim, Dong Kyu
Source:
Energy 2019 v.172 pp. 26-35
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; batteries; electrodes; electrolytes; equations; porosity;     Show all 6 Subjects
Abstract:
... Experimental and numerical studies have been carried out to improve the flow distribution by optimizing the local porosity of the electrodes of the all-vanadium redox flow batteries (VFBs) to increase the energy efficiency at high current density. We control the local porosity by inserting extra layer of electrode at inlet and outlet, and the flow field of electrolyte is analyzed numerically. Firs ...
DOI:
10.1016/j.energy.2019.01.101

9. Pressure retarded osmosis: Operating in a compromise between power density and energy efficiency

Author:
Long, Rui; Lai, Xiaotian; Liu, Zhichun; Liu, Wei
Source:
Energy 2019 v.172 pp. 592-598
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; energy policy; models; osmosis; salinity;     Show all 5 Subjects
Abstract:
... Pressure retarded osmosis (PRO) is a promising technology for salinity gradient energy utilization. Here, based on previous literature, we proposed a simplified model to describe the PRO process, which was validated by a great accordance with the experimental data of water flux and power density. A sensitivity analysis of the PRO system indicated that there exist different optimal hydraulic pressu ...
DOI:
10.1016/j.energy.2019.01.169

10. Experimental analysis of a novel ozone generator configuration for use in water treatment applications

Author:
Draou, Abdelkader; Nemmich, Said; Nassour, Kamel; Benmimoun, Youcef; Tilmatine, Amar
Source:
TheInternational journal of environmental studies 2019 v.76 no.2 pp. 338-350
ISSN:
1029-0400
Subject:
energy efficiency,   etc   ; models; ozone; wastewater treatment;     Show all 4 Subjects
Abstract:
... Volume dielectric barrier discharge (VDBD) is considered to be the most effective method for ozone generation. This paper reports a comparison between a simple ‘classic’ VDBD cylindrical ozone generator and a ‘metallic-mesh-filled-air-gap cylindrical dielectric barrier discharge’ model. The obtained results show that although the majority of ozone generators are of the volume discharge type, the n ...
DOI:
10.1080/00207233.2018.1499698

11. Only non-energy benefits from the adoption of energy efficiency measures? A novel framework

Author:
Cagno, Enrico; Moschetta, Davide; Trianni, Andrea
Source:
Journal of cleaner production 2019 v.212 pp. 1319-1333
ISSN:
0959-6526
Subject:
energy efficiency,   etc   ; business enterprises; decision making; manufacturing;     Show all 4 Subjects
Abstract:
... Industrial energy efficiency has been widely recognized as a major contributor to the reduction of greenhouse gases emissions and improvement of industrial competitiveness. Nevertheless, a broad set of studies have pointed out the existence of barriers limiting the adoption of promising Energy Efficiency Measures (EEMs). Recently, scholars have shown the relevance of the so-called "non-energy bene ...
DOI:
10.1016/j.jclepro.2018.12.049

12. Vanadium redox flow battery with slotted porous electrodes and automatic rebalancing demonstrated on a 1 kW system level

Author:
Bhattarai, Arjun; Wai, Nyunt; Schweiss, Rüdiger; Whitehead, Adam; Scherer, Günther G.; Ghimire, Purna C.; Lim, Tuti M.; Hng, Huey Hoon
Source:
Applied energy 2019 v.236 pp. 437-443
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; batteries; electrodes; electrolytes; tanks; vanadium;     Show all 6 Subjects
Abstract:
... Capacity loss due to electrolyte crossover through the membrane and pump losses due to pressure drop at the porous electrodes are widely known issues in vanadium redox flow batteries during operation. In commercial systems, these losses account for a significant reduction in the overall efficiency. Previous studies have been focused on the development of new membranes to solve the capacity loss, a ...
DOI:
10.1016/j.apenergy.2018.12.001

13. Estimating urban residential building-related energy consumption and energy intensity in China based on improved building stock turnover model

Author:
Huo, Tengfei; Ren, Hong; Cai, Weiguang
Source:
The Science of the total environment 2019 v.650 pp. 427-437
ISSN:
0048-9697
Subject:
energy efficiency,   etc   ; carbon; construction materials; models; China;     Show all 5 Subjects
Abstract:
... Accurate estimation of urban residential building-related energy consumption (URBEC) and energy intensity per unit floor area at the national level has significant implications for the analysis of carbon emission peaks. However, reliable data on China's building floor space (BFS) are lacking, resulting in unclear energy intensity levels. This study proposes a China BFS estimation method (CBFSEM) b ...
DOI:
10.1016/j.scitotenv.2018.09.008

14. Thermodynamic considerations on MEA absorption: Whether thermodynamic cycle could be used as a tool for energy efficiency analysis

Author:
Wang, Junyao; Sun, Taiwei; Zhao, Jun; Deng, Shuai; Li, Kaixiang; Xu, Yaofeng; Fu, Jianxin
Source:
Energy 2019 v.168 pp. 380-392
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; absorbents; absorption; carbon; ethanolamine; heat;     Show all 6 Subjects
Abstract:
... Regeneration heat duty is not the only metric for an absorbent, but it is one of the most decisive factors that define the performance of chemical absorption carbon capture technologies. Nevertheless, from the thermodynamic point of view, there are still insufficient studies on evaluating and analyzing the energy efficiency performance of liquid-phase chemisorption technologies, especially conside ...
DOI:
10.1016/j.energy.2018.11.084

15. Biomass-Derived Carbonaceous Materials: Recent Progress in Synthetic Approaches, Advantages, and Applications

Author:
Yang, Da-Peng; Li, Zibiao; Liu, Minghuan; Zhang, Xiaoyan; Chen, Yisong; Xue, Hun; Ye, Enyi; Luque, Rafael
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.5 pp. 4564-4585
ISSN:
2168-0485
Subject:
energy efficiency,   etc   ; biomass; hydrothermal carbonization; synthesis;     Show all 4 Subjects
Abstract:
... Current energy shortages and environmental crises have compelled researchers to look for inexpensive and sustainable resources that can be obtained via environmentally friendly routes to produce novel functional materials. Biomass has been identified as one of the promising candidates given its availability in large quantities and renewable nature. Among the various feasible synthetic strategies, ...
DOI:
10.1021/acssuschemeng.8b06030

16. Integration of a thermochemical energy storage system in a Rankine cycle driven by concentrating solar power: Energy and exergy analyses

Author:
Pelay, Ugo; Luo, Lingai; Fan, Yilin; Stitou, Driss; Castelain, Cathy
Source:
Energy 2019 v.167 pp. 498-510
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; calcium oxide; exergy; solar energy;     Show all 4 Subjects
Abstract:
... This paper proposes and investigates novel concepts on the integration of a thermochemical energy storage (TCS) system in a concentrating solar power (CSP) plant. The TCS material used is calcium oxide reacting with water and the power cycle studied is a Rankine cycle driven by CSP. Firstly, three integration concepts on the coupling of the TCS system with the Rankine cycle are proposed, including ...
DOI:
10.1016/j.energy.2018.10.163

17. Operations scheduling for waste minimization: A review

Author:
Le Hesran, Corentin; Ladier, Anne-Laure; Botta-Genoulaz, Valérie; Laforest, Valérie
Source:
Journal of cleaner production 2019 v.206 pp. 211-226
ISSN:
0959-6526
Subject:
energy efficiency,   etc   ; planning; terminology; waste reduction; wastes;     Show all 5 Subjects
Abstract:
... This article proposes a review on waste minimization at the operational level of production planning. After defining the research scope and the concept of waste minimization through scheduling, the state-of-the-art is presented. A classification based on environmental and scheduling criteria is proposed, which details the various types of scheduling problems encountered and groups them into differ ...
DOI:
10.1016/j.jclepro.2018.09.136

18. Financial model for energy efficiency projects in the mining industry

Author:
Nel, A.J.H.; Vosloo, J.C.; Mathews, M.J.
Source:
Energy 2018 v.163 pp. 546-554
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; mining; models;     Show all 3 Subjects
Abstract:
... The impact of industrial EE projects have previously been understated by the omission of non-energy benefits (NEBs). As a result, several fruitful projects have not been implemented which could have dire consequences for energy intensive industries, such as the mining industry. Typically, project feasibility is determined through financial evaluation techniques such as payback period, internal rat ...
DOI:
10.1016/j.energy.2018.08.154

19. Sulfonated polysulfone proton exchange membrane influenced by a varied sulfonation degree for vanadium redox flow battery

Author:
Zhang, Yuxia; Zheng, Lanyue; Liu, Bo; Wang, Haixia; Shi, Haifeng
Source:
Journal of membrane science 2019 v.584 pp. 173-180
ISSN:
0376-7388
Subject:
energy efficiency,   etc   ; artificial membranes; batteries; durability; physicochemical properties; vanadium;     Show all 6 Subjects
Abstract:
... A series of sulfonated polysulfone (SPSF) proton exchange membranes with varied degree of sulfonation (DS) are prepared through controlling the molar ratio of sulfonated agent and polysulfone (PSF). An optimum DS for SPSF membranes is given by characterizing the physicochemical properties, ion selectivity and vanadium redox flow battery (VRFB) performance. SPSF membrane with DS = 62% (SPSF-62) dem ...
DOI:
10.1016/j.memsci.2019.04.073

20. Real-time energy convex optimization, via electrical storage, in buildings – A review

Author:
Georgiou, Giorgos S.; Christodoulides, Paul; Kalogirou, Soteris A.
Source:
Renewable energy 2019 v.139 pp. 1355-1365
ISSN:
0960-1481
Subject:
energy efficiency,   etc   ; batteries; buildings; primary energy; renewable energy sources;     Show all 5 Subjects
Abstract:
... Energy in buildings covers a major and wide range of subject, which has attracted a great interest of the academic sector in recent years. Due to the high share of the global primary energy consumption associated with buildings, many studies have been published toward energy efficient buildings and the reduction of their primary energy consumption and energy management and optimization, for both R ...
DOI:
10.1016/j.renene.2019.03.003