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1. Comparison of mesophilic and thermophilic anaerobic digestions of thermal hydrolysis pretreated swine manure: Process performance, microbial communities and energy balance

Author:
Xiaohui Liu; Changmin Lee; Jae Young Kim
Source:
Journal of environmental sciences (China) 2023 v.126 pp. 222-233
ISSN:
1001-0742
Subject:
energy efficiency,   etc   ; Euryarchaeota; ammonia; anaerobic digestion; biogas; economic performance; energy balance; methane production; pig manure; thermal hydrolysis; China;     Show all 11 Subjects
Abstract:
... Anaerobic digestion (AD) of swine manure (SM) commonly shows low biogas output and unsatisfactory economic performance. In this study, thermophilic AD (TAD, 50 ± 1 °C) was combined with thermal hydrolysis pretreatment (THP, 170 °C/10 bar), to investigate its potential for maximizing biogas yield, securing successful digestion and microbial diversity, as well as improving energy balance. Four lab-s ...
DOI:
10.1016/j.jes.2022.03.032

2. Distributed model predictive control for coordinated, grid-interactive buildings

Author:
Christopher J. Bay; Rohit Chintala; Venkatesh Chinde; Jennifer King
Source:
Applied energy 2022 v.312 pp. 118612
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; algorithms; carbon;     Show all 3 Subjects
Abstract:
... Continued focus on reducing carbon emissions and improving energy efficiency requires buildings to become grid-interactive and not just behave as static consumers. A distributed model predictive control (DMPC) algorithm known as Limited-Communication (LC) DMPC is modified to enable grid-interactive buildings. A grid-aggregator subsystem is added that allows for a bulk grid power reference signal t ...
DOI:
10.1016/j.apenergy.2022.118612

3. A Prospect Theory-based experimental vignette methodology for exploring rebound effects and rebound-damping interventions

Author:
Karolin Schmidt; Philipp Kösling; Sebastian Bamberg; Anke Blöbaum
Source:
Ecological economics 2022 v.193 pp. 107302
ISSN:
0921-8009
Subject:
energy efficiency,   etc   ; climate; ecological economics;     Show all 3 Subjects
Abstract:
... Reducing energy use through increased energy efficiency in production and consumption represents a crucial strategy by national governments for reaching their climate protection goals. Unfortunately, increasing the technological energy efficiency may raise the demand for these services (i.e., rebound effect). To provide appropriate proposals on how this undesired effect could be stopped or at leas ...
DOI:
10.1016/j.ecolecon.2021.107302

4. A filter less improved control scheme for active/reactive energy management in fuel cell integrated grid system with harmonic reduction ability

Author:
Sheikh Tanzim Meraj; Nor Zaihar Yahaya; Kamrul Hasan; M.S. Hossain Lipu; Rajvikram Madurai Elavarasan; Aini Hussain; M.A. Hannan; Kashem M. Muttaqi
Source:
Applied energy 2022 v.312 pp. 118784
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; electricity; fuel cells;     Show all 3 Subjects
Abstract:
... Fuel-cell integrated electrical grid systems are considered the future of energy generation since it is highly energy-efficient and environmentally friendly. However, they are still in the initial phase of implementation and hold some drawbacks that need to be addressed. In fuel cell integrated grid systems, electrical loads usually produce active/reactive power which hampers the nominal operation ...
DOI:
10.1016/j.apenergy.2022.118784

5. Energy-efficient virtual machine placement in data centres via an accelerated Genetic Algorithm with improved fitness computation

Author:
Elham Hormozi; Shuwen Hu; Zhe Ding; Yu-Chu Tian; You-Gan Wang; Zu-Guo Yu; Weizhe Zhang
Source:
Energy 2022 v.252 pp. 123884
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; algorithms; data collection;     Show all 3 Subjects
Abstract:
... Energy efficiency is a critical issue in data centre management, which is the foundation for cloud computing. The VM placement has a considerable impact on a data centre's energy efficiency and resource utilisation. The assignment of VMs to PMs is an NP-hard problem without an easy way to find an optimal solution, particularly in large-scale data centres. In this study, the VM placement problem is ...
DOI:
10.1016/j.energy.2022.123884

6. High-efficiency fuel utilization innovation in microfluidic fuel cells: From liquid-feed to vapor-feed

Author:
Tiancheng Ouyang; Jie Lu; Peihang Xu; Xiaoyi Hu; Jingxian Chen
Source:
Energy 2022 v.240 pp. 122484
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; electrolytes; fuel cells;     Show all 3 Subjects
Abstract:
... Fuel cells are an efficient, environmentally friendly and renewable energy device, which is synonymous with the green age. Microfluidic fuel cells are an excellent solution to the energy needs of portable electronic devices. In the present study, both vapor- and liquid-feed modes are established, which are combined with physical fields. Moreover, the accuracy of the models is verified. According t ...
DOI:
10.1016/j.energy.2021.122484

7. On the equivalent thermo-physical properties for modeling building walls with unknown stratigraphy

Author:
Luca Evangelisti; Roberto De Lieto Vollaro; Francesco Asdrubali
Source:
Energy 2022 v.238 pp. 121679
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; stratigraphy; thermal conductivity;     Show all 3 Subjects
Abstract:
... It is known that energy efficiency passes through the renovation of the built heritage. However, the technical data may be unknown, thus applying not always suitable assumptions. Documents may have been lost and uncertainties may occur. In this context, the description of multilayer walls through equivalent models could solve the information lack issues.In this study, an experimental campaign is c ...
DOI:
10.1016/j.energy.2021.121679

8. Optimal controls of precooling strategies using switchable insulation systems for commercial buildings

Author:
Ammar H.A. Dehwah; Moncef Krarti
Source:
Applied energy 2022 v.320 pp. 119298
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; insulating materials; precooling;     Show all 3 Subjects
Abstract:
... In this paper, optimized controls to enhance the energy efficiency and demand response benefits of roof-integrated switchable insulation system combined with precooling strategies are evaluated for office buildings. A wide range of optimal cost functions are investigated to evaluate the total building energy saving as well as electrical peak demand shedding and shifting potentials. The results ind ...
DOI:
10.1016/j.apenergy.2022.119298

9. Smart fusion of sensor data and human feedback for personalized energy-saving recommendations

Author:
Iraklis Varlamis; Christos Sardianos; Christos Chronis; George Dimitrakopoulos; Yassine Himeur; Abdullah Alsalemi; Faycal Bensaali; Abbes Amira
Source:
Applied energy 2022 v.305 pp. 117775
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; energy conservation; humans;     Show all 3 Subjects
Abstract:
... Despite the variety of sensors that can be used in a smart home or office setup, for monitoring energy consumption and assisting users to save energy, their usefulness is limited when they are not properly integrated into the daily activities of humans. Energy-saving applications in such environments can benefit from the use of sensors and actuators when data are properly fused with previous knowl ...
DOI:
10.1016/j.apenergy.2021.117775

10. Experimental investigation on indoor environment and energy performance of convective terminals

Author:
Zixu Yang; Hongli Sun; Baolong Wang; Hansong Xiao; Xian Dong; Wenxing Shi; Borong Lin
Source:
Energy 2022 v.251 pp. 123929
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; air; asymmetry; cold; temperature;     Show all 5 Subjects
Abstract:
... The indoor environment and energy performances of convective terminals have been widely studied under the strong heating demands in cold regions. As different operative conditions affect the performances of heating devices, investigating these factors under different conditions can help improve the performances. In this study, the thermal performances of fan coil units (FCUs) and room air conditio ...
DOI:
10.1016/j.energy.2022.123929

11. Interfacial co-weaving of AO-PIM-1 and ZIF-8 in composite membranes for enhanced H2 purification

Author:
Shaohui Xiong; Chunyue Pan; Guoliu Dai; Cheng Liu; Zhijian Tan; Chuang Chen; Song Yang; Xuehua Ruan; Juntao Tang; Guipeng Yu
Source:
Journal of membrane science 2022 v.645 pp. 120217
ISSN:
0376-7388
Subject:
energy efficiency,   etc   ; geometry; microstructure; permeability; polymers;     Show all 5 Subjects
Abstract:
... Porous asymmetric composite membranes (ACMs) have attracted intensive attentions in energy-efficient gas separations. However, fabricating ACMs with defect-free interface and enhanced selectivity without sacrificing permeability remains great challenge. Herein, a major step towards this goal is proposed by employing an efficient co-weaving strategy to regulate interfacial microstructure of ACMs wi ...
DOI:
10.1016/j.memsci.2021.120217

12. Novel approach to energy-efficient flexible job-shop scheduling problems

Author:
Nikolaos Rakovitis; Dan Li; Nan Zhang; Jie Li; Liping Zhang; Xin Xiao
Source:
Energy 2022 v.238 pp. 121773
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; algorithms; gene expression; models;     Show all 4 Subjects
Abstract:
... In this work, we develop a novel mathematical formulation for the energy-efficient flexible job-shop scheduling problem using the improved unit-specific event-based time representation. The flexible job-shop is represented using the state-task network. It is shown that the proposed model is superior to the existing models with the same or better solutions by up to 13.5 % energy savings in less com ...
DOI:
10.1016/j.energy.2021.121773

13. Numerical analysis of feedforward concepts for advanced control of organic Rankine cycle systems on heavy-duty vehicles

Author:
Roberto Pili; Christoph Wieland; Hartmut Spliethoff; Fredrik Haglind
Source:
Journal of cleaner production 2022 v.351 pp. 131470
ISSN:
0959-6526
Subject:
energy efficiency,   etc   ; environmental impact; mass flow;     Show all 3 Subjects
Abstract:
... Organic Rankine cycle systems are the most promising technology to recover the waste heat from heavy-duty vehicles in an efficient and economical way, thus increasing their energy efficiency and reducing their environmental impact. A major challenge for an efficient and profitable integration of the organic Rankine cycle unit is presented by the highly transient nature of the waste heat during a d ...
DOI:
10.1016/j.jclepro.2022.131470

14. The cost of energy efficiency programs: Estimates from utility-reported datasets

Author:
Patrick Knight; Bruce Biewald; Kenji Takahashi
Source:
Energy 2022 v.239 pp. 122448
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; cost effectiveness; data collection;     Show all 3 Subjects
Abstract:
... Electric utilities and state regulators increasingly rely on energy efficiency to meet energy needs. However, in many jurisdictions, the cost-effectiveness of energy efficiency is still debated. Previous estimates of the cost of saved energy have relied on studies of limited program portfolios, or analysis of datasets that are proprietary, not easily verified, or outdated. Based on analysis of cos ...
DOI:
10.1016/j.energy.2021.122448

15. The drivers of energy intensity changes in Chinese cities: A production-theoretical decomposition analysis

Author:
P. Zhou; H. Zhang; L.P. Zhang
Source:
Applied energy 2022 v.307 pp. 118230
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; policy analysis; technological change;     Show all 3 Subjects
Abstract:
... Quantifying the drivers of energy intensity change could provide valuable information for policy analysis and making. This study applied production-theoretical decomposition analysis to investigate the driving forces behind the energy intensity changes in Chinese cities between 2006 and 2017. The empirical results show that technological change and capital-energy substitutions were responsible for ...
DOI:
10.1016/j.apenergy.2021.118230

16. A new energy storage sharing framework with regard to both storage capacity and power capacity

Author:
Jiang-Wen Xiao; Yan-Bing Yang; Shichang Cui; Xiao-Kang Liu
Source:
Applied energy 2022 v.307 pp. 118171
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; algorithms; electricity; electricity costs; multipliers;     Show all 5 Subjects
Abstract:
... Energy storage systems have received widespread attention due to their advantages on rapid response, smooth fluctuations, and the reduction of temporal and spatial imbalance. At present, most researchers mainly consider the allocation of energy storage capacity while using an average allocation of the power capacity, which may lead to conflicts among users when executing the energy sharing strateg ...
DOI:
10.1016/j.apenergy.2021.118171

17. Country-level evaluation of solar radiation data sets using ground measurements in China

Author:
Qimeng Cao; Yan Liu; Xue Sun; Liu Yang
Source:
Energy 2022 v.241 pp. 122938
ISSN:
0360-5442
Subject:
energy efficiency,   etc   ; data collection; solar radiation; China;     Show all 4 Subjects
Abstract:
... Solar radiation is a crucial parameter that affects the thermal environment in buildings. The spatial and temporal distributions of solar radiation data are important for energy-efficient building design. Models that correlate solar radiation with other parameters can address the lack of solar radiation data. Satellite-derived products and reanalysis data sets have been produced using solar radiat ...
DOI:
10.1016/j.energy.2021.122938

18. Enhancing Converse Magnetoelectric Coupling Through Strain Engineering in Artificial Multiferroic Heterostructures

Author:
Lauren M. Garten; Margo L. Staruch; Konrad Bussmann; James Wollmershauser; Peter Finkel
Source:
ACS applied materials & interfaces 2022 v.14 no.22 pp. 25701-25709
ISSN:
1944-8252
Subject:
energy efficiency,   etc   ; ambient temperature; anisotropy; magnetism; memory;     Show all 5 Subjects
Abstract:
... Magnetoelectric materials present a unique opportunity for electric field-controlled magnetism. Even though strain-mediated multiferroic heterostructures have shown unprecedented increase in magnetoelectric coupling compared to single-phase materials, further improvements must be made before ultra-low power memory, logic, magnetic sensors, and wide spectrum antennas can be realized. This work pres ...
DOI:
10.1021/acsami.2c03869

19. Exploring carbon rebound effects in Chinese households’ consumption: A simulation analysis based on a multi-regional input–output framework

Author:
Donglan Zha; Qian Chen; Lijun Wang
Source:
Applied energy 2022 v.313 pp. 118847
ISSN:
0306-2619
Subject:
energy efficiency,   etc   ; carbon; risk; simulation models; China;     Show all 5 Subjects
Abstract:
... Improving energy efficiency is considered to be essential to carbon emission reduction. However, it may not be as effective as expected due to the rebound effect. This paper attempts to investigate the carbon rebound effects and rebound risks in households. For this purpose, a comprehensive analysis framework incorporating elastic estimates, environmentally extended multi-regional input–output mod ...
DOI:
10.1016/j.apenergy.2022.118847

20. Green building aspects in Bangladesh: A study based on experts opinion regarding climate change

Author:
Md. Arif Chowdhury; Hasnat Sabrina; Rashed Uz Zzaman; Syed Labib Ul Islam
Source:
Environment, development and sustainability 2022 v.24 no.7 pp. 9260-9284
ISSN:
1387-585X
Subject:
energy efficiency,   etc   ; climate change; environment; livelihood; Bangladesh;     Show all 5 Subjects
Abstract:
... Climate change is affecting the life and livelihood of people all over the world, where Bangladesh is one of the most susceptible countries. Anthropogenic climate change is one of the consequences of an increase in the emission of greenhouse gases. Green building practice may be helpful in reducing the emissions. Focusing on the importance of green building and climate change, this study was condu ...
DOI:
10.1007/s10668-021-01823-0