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Optimization of fuel injection parameters and compression ratio of a biogas fueled diesel engine using methyl esters of waste cooking oil as a pilot fuel Energy (IF 6.082) Pub Date : 2021-01-15 Naseem Khayum; S. Anbarasu; S. Murugan
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Reduced-order electrochemical model for lithium-ion battery with domain decomposition and polynomial approximation methods Energy (IF 6.082) Pub Date : 2021-01-19 Changlong Li; Naxin Cui; Chunyu Wang; Chenghui Zhang
The pseudo-two-dimensional (P2D) electrochemical model can give insight into the internal behavior of lithium-ion batteries, which is of great significance for intelligent battery management. However, the computational complexity of the P2D model greatly limits its onboard application. This paper devotes to develop a reduced-order electrochemical model (ROEM) with high fidelity yet low computational
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Maximizing the energy potential of urban sludge treatment: An experimental study and a scenario-based energy analysis focusing on anaerobic digestion with ultrasound pretreatment and sludge combustion Energy (IF 6.082) Pub Date : 2021-01-16 Emrehan Berkay Çelebi; Ayşegül Aksoy; F. Dilek Sanin
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Co-hydrothermal carbonization of sewage sludge and lignocellulosic biomass: Fuel properties and heavy metal transformation behaviour of hydrochars Energy (IF 6.082) Pub Date : 2021-01-18 Xiaoluan Lu; Xiaoqian Ma; Xinfei Chen
In this study, co-hydrothermal carbonization (co-HTC) of sewage sludge (SS) and lignocellulosic biomass was conducted at 220 °C for 1 h, and transformation behaviour of heavy metals during co-HTC, along with fuel properties, were investigated. The results showed that the majority of Cr, Ni, Cu and Zn was still accumulated in hydrochar during individual HTC of SS. The addition of lignocellulosic biomass
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Numerical simulation of gas production from permafrost hydrate deposits enhanced with CO2/N2 injection Energy (IF 6.082) Pub Date : 2021-01-19 Jing-Yu Kan; Yi-Fei Sun; Bao-Can Dong; Qing Yuan; Bei Liu; Chang-Yu Sun; Guang-Jin Chen
A new numerical simulator was developed from the widely used CH4 hydrate simulator TOUGH + HYDRATE to realize the simulation of hydrate exploitation by CO2/N2–CH4 replacement. Focusing on actual hydrate reservoir, CO2/N2 injection combined with depressurization in a practical continuous injection-production mode was applied for gas production. The influence of feed gas composition and injection pressure
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Combustion of distillery sludge mixed with coal in a drop tube furnace and emission characteristics Energy (IF 6.082) Pub Date : 2021-01-21 Prashik Manwatkar; Lekha Dhote; Ram Avtar Pandey; Anirban Middey; Sunil Kumar
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Energy and exergy analyses of an improved recompression supercritical CO2 cycle for coal-fired power plant Energy (IF 6.082) Pub Date : 2021-01-27 Wengang Bai; Hongzhi Li; Lei Zhang; Yifan Zhang; Yu Yang; Chun Zhang; Mingyu Yao
An improved recompression S-CO2 cycle for coal-fired power plant is proposed in order to improve boiler thermal efficiency, increase cycle exergy efficiency, and resolve issues of regulating the working fluid temperature of the boiler rapidly and effectively. The models for energy and exergy analyses are built. Systematic comparisons between the improved S-CO2 cycle system and the original S-CO2 cycle
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Understanding green building energy performance in the context of commercial estates: A multi-year and cross-region analysis using the Australian Commercial Building Disclosure database Energy (IF 6.082) Pub Date : 2021-01-27 Xuechen Gui; Zhonghua Gou
To understand the relationship between green building energy performance and regional commercial estates, this study analysed Australia’s Commercial Building Disclosure (CBD) program database. This database discloses the annual energy use intensity (EUI) and the corresponding energy rating (1–6 stars) of 2,460 National Australian Built Environment Rating System (NABERS) certified office buildings.
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Insights into evolution mechanism of PAHs in coal thermal conversion: A combined experimental and DFT study Energy (IF 6.082) Pub Date : 2021-01-27 Yi-Feng Chen; Sheng Su; Liang-Ping Zhang; Long Jiang; Meng-Xia Qing; Huan-Ying Chi; Peng Ling; Heng-Da Han; Kai Xu; Yi Wang; Song Hu; Jun Xiang
The evolution mechanism and energy conversion of volatile in low-rank coal with pyrolysis temperatures still remain uncertain. The experimental results on gas products and light tar pyrolyzed from Shenfu coal at various pyrolysis temperatures reflect the complex correlation between volatiles and coal structure affected by temperatures. Thermodynamic competitive evolution towards CO from oxygen-containing
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Price Sensitivity and Consumers’ Support for Renewable Energy in China Energy (IF 6.082) Pub Date : 2021-01-27 Xuemei Zheng; Cao Li; Xingming Fang; Ning Zhang
This paper investigates how consumers’ price sensitivity affects their support for renewable energy, from the perspective of the probability they are willing to pay a premium for the electricity generated from renewable energy (i.e., green electricity) and the amount of premium they are willing to pay for each unit of green electricity. We first construct a brief theoretical framework linking the premium
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Industrial Electricity Consumption and Economic Growth: A spatio-temporal analysis across Prefecture-Level Cities in China from 1999 to 2014 Energy (IF 6.082) Pub Date : 2021-01-27 Wencong Cui; Jianyi Li; Wangtu Xu; Burak Güneralp
The relationship between energy consumption and economic growth has deservedly received much attention in the literature due to its significance to sustainable development, particularly in countries such as China with rapid economic growth. However, few studies have explored the spatial heterogeneous nature of this relationship within countries where there are spatial variations in terms the level
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Improved Energy Performance of a PEM Fuel Cell by Introducing Discontinuous S-shaped and Crescent Ribs into Flowing Channels Energy (IF 6.082) Pub Date : 2021-01-27 Pengcheng Dong; Gongnan Xie; Meng Ni
Better mass transfer, more uniform temperature distribution, small pressure drop, and improved electrochemical performance can be achieved by designing better flow field in PEM fuel cells. In this paper, based on the concept of a sinusoidal rib, two kinds of discontinuous ribs: S-shaped rib and crescent rib, are proposed and introduced into the flow channels of a PEM fuel cell. Results show that the
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An integrated framework of Bi-directional long-short term memory (BiLSTM) based on sine cosine algorithm for hourly solar radiation forecasting Energy (IF 6.082) Pub Date : 2021-01-16 Tian Peng; Chu Zhang; Jianzhong Zhou; Muhammad Shahzad Nazir
Accurate and reliable solar radiation forecasting is of great significance for the management and utilization of solar energy. This study proposes a deep learning model based on Bi-directional long short-term memory (BiLSTM), sine cosine algorithm (SCA) and complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) for solar radiation forecasting. Firstly, the CEEMDAN is applied to
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Pathways to electric mobility integration in the Italian automotive sector Energy (IF 6.082) Pub Date : 2021-01-18 Sara Abd Alla; Vincenzo Bianco; Luca A. Tagliafico; Federico Scarpa
The electrification of the road transport sector is seen as a necessary component to the urban decarbonization. A scenario analysis of electric cars deployment is developed by employing the Long-range Energy Alternative Planning platform to build a bottom-up model to evaluate the contribution to the energy transition in the long term. The difference with similar models available in the literature is
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Considerations on factors affecting biochar densification behavior based on a multiparameter model Energy (IF 6.082) Pub Date : 2021-01-19 Lorenzo Riva; Liang Wang; Giulia Ravenni; Pietro Bartocci; Therese Videm Buø; Øyvind Skreiberg; Francesco Fantozzi; Henrik Kofoed Nielsen
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Semi-continuous co-digestion of sludge, fallen leaves, and grass performance Energy (IF 6.082) Pub Date : 2021-01-19 Mahmoud Elsayed; Walid Blel; Mohamed Soliman; Yves Andres; Raouf Hassan
The aim of this study is to improve the management of different types of wastes using an anaerobic digestion process and CH4 production from the semi-continuous co-digestion of multi-substrates of fallen leaves (FL), grass (GR) and primary sludge (PS). As a first step, the co-digestion of FL, GR and PS was carried out using the BMP test based on C/N ratios. The results showed that the best CH4 production
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Visual Test and Evolutionary Analysis of Flow Fields in Cylinder of Helical Intake Port Diesel Engine Energy (IF 6.082) Pub Date : 2021-01-26 Wei Zhang; Zhaohui Chen; Qiwang Duan; Qianyu Jiang
The paper intends to overcome the difficulties associated with conventional PIV test techniques in measuring the flow fields near curved surfaces. So the paper combines the visual steady flow test and the CFD simulation method, to help observe the law of particle distribution near the cylinder wall directly, and reveal the law of steady/transient flow field movement and airflow evolution. The results
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Efficient AC-DC power factor corrected boost converter design for battery charger in electric vehicles Energy (IF 6.082) Pub Date : 2021-01-03 Omer Turksoy; Unal Yilmaz; Ahmet Teke
With the widespread use of electric vehicles (EVs), the design of a highly quality and efficient battery charger has become an important research topic. In this study, an efficient AC-DC power factor corrected (PFC) boost converter with active snubber cell (ASC) is proposed for the battery charger. ASC integrated into the AC-DC PFC boost converter turns on the main switch with zero voltage transition
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Energy efficiency in leading emerging and developed countries Energy (IF 6.082) Pub Date : 2021-01-11 Elena G. Popkova; Bruno S. Sergi
This paper defines the diverging interests of multiple actors in typically achieving and advancing energy efficiency. Gaps in the literature include the short elaboration of energy efficiency factors and conditions and the lack of information about developed and developing countries and thorough consideration of their specific features, impeding the development and implementation of detailed energy
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Developments and applications of porous medium combustion: A recent review Energy (IF 6.082) Pub Date : 2021-01-18 Abhisek Banerjee; Diplina Paul
Global attention on fuel efficiency, reduced emissions and the ability to operate with a wide range of fuels having low calorific values, continues to drive research and development in the field of porous medium combustion (PMC). PMC is a modern technology where combustion occurs within voids of the solid porous matrix. Researchers worldwide have developed PMC technology for various applications: from
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Measurement and influential factors of the efficiency of coal resources of China’s provinces: Based on Bootstrap-DEA and Tobit Energy (IF 6.082) Pub Date : 2021-01-06 Liming Xue; Wenjie Zhang; Zhixue Zheng; Zhe Liu; Shuo Meng; Huaqing Li; Yulin Du
A more efficient use of China’s coal resources is key to rapidly promoting the growth of the country’s industrializing economy. As such, it is essential that an effective approach for measuring and evaluating the current efficiency of coal resources is developed. This paper measures the efficiency of coal resources in 30 provinces in China from 2000 to 2015 using an improved DEA model of Bootstrap
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Improvement potential of Cryogenic Energy Storage systems by process modifications and heat integration Energy (IF 6.082) Pub Date : 2021-01-17 Rohan Dutta; Pavitra Sandilya
Cryogenic Energy Storage (CES) system is currently gaining significant attention in the field of large-scale energy storage systems. This is because this system can provide high energy-density during storage and uses air or nitrogen that are available at no or a low cost. Moreover, the technology has matured and can be used on-site in a decoupled manner. The CES system has three sub-processes, namely
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CO2 capture on aminosilane functionalized alumina-extracted residue of catalytic gasification coal ash Energy (IF 6.082) Pub Date : 2020-12-17 Xiangyu Li; Zhiqing Wang; Ru Feng; Jiejie Huang; Yitian Fang
The technology of alumina-extraction from coal ash provides an effective way for re-utilization of coal based solid waste as resource. However, one of the most serious challenges that this technology face is the harmless treatment of alumina-extracted residue (AR). Considering the structure and properties of AR, a scheme was proposed to make the AR as a potential sorbent for CO2, and in order to achieve
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Long-term scenario pathways to assess the potential of best available technologies and cost reduction of avoided carbon emissions in an existing 100% renewable regional power system: A case study of Gilgit-Baltistan (GB), Pakistan Energy (IF 6.082) Pub Date : 2021-01-15 Arif Hussain; Usama Perwez; Kafait Ullah; Chul-Hwan Kim; Nosheen Asghar
The long-term power planning at the regional level has recently gained significance due to the economic and efficiency competitiveness of a decentralized energy system. In Pakistan, the power sector faces the challenge of exceptionally increasing electricity demand in metropolitan areas and the urgency of reliable power access in rural areas. In this paper, a regional power-generation system of GB
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Aqueous mineral carbonation of oil shale mine waste (limestone): A feasibility study to develop a CO2 capture sorbent Energy (IF 6.082) Pub Date : 2021-01-19 Sanoop Kumar Puthiya Veetil; Kaarel Rebane; Can Rüstü Yörük; Margus Lopp; Andres Trikkel; Michael Hitch
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Hybrid model with secondary decomposition, randomforest algorithm, clustering analysis and long short memory network principal computing for short-term wind power forecasting on multiple scales Energy (IF 6.082) Pub Date : 2021-01-18 zexian Sun; mingyu Zhao; yan Dong; xin Cao; Hexu Sun
As the first prerequisite to carve out the increased exploration of the wind power generation and developments, accurate wind power prediction is sufficiently reliable to eliminate the dilemma caused by its intrinsic irregularity, intermittence and non-stationary. Therefore, the paper proposes the hybrid model composed of secondary decomposition, preliminary forecasting and error analysis, which can
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Geomechanical and energy analysis on the small- and medium-scale CAES in salt domes Energy (IF 6.082) Pub Date : 2021-01-19 Jingtao Zhang; Amin Hosseini Zadeh; Seunghee Kim
The concept of small- or medium-scale CAES using salt domes at a depth shallower than 500 m and in the capacity of 10–100 MW was recently suggested to address a burden associated with geologic exploration and high investment cost. In this study, we employed an analytical approach to calculate the hoop and radial stresses at the crown and sidewall of the storage cavity under the given cavity depth (h)
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Exergy analysis of a novel multi-stage latent heat storage device based on uniformity of temperature differences fields Energy (IF 6.082) Pub Date : 2021-01-18 Jiaqi Li; Rang Tu; Mengdan Liu; Siqi Wang
For shell-and-tube type latent heat storage devices, heat transfer rate reduces with time due to the increasement of ineffective heat transfer area. To solve this problem, a latent heat storage device, which is made of ‘replaceable multi-stage’ phase change plates (PCPs), is proposed in this paper. When one PCP has no heating ability, it is replaced by a new PCP. Effects of the ‘replaceable multi-stage’
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Optimizing the structural design of cathode catalyst layer for PEM fuel cells for improving mass-specific power density Energy (IF 6.082) Pub Date : 2021-01-19 Rui Lin; Hong Wang; Yu Zhu
The design of cathode catalyst layers (CCLs) is essential for enhanced charge transfer and mass transport of proton exchange membrane fuel cells (PEMFCs). In this work, CCLs are designed to constitute the three sub-layers with different polytetrafluoroethylene (PTFE) loadings for each sub-layer. The improper addition of PTFE in the different CCL positions can increase the gas-liquid phase’s mass transfer
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Components and structural characteristics of dissolved organic matter in the overlying water of the Beiyun River Energy (IF 6.082) Pub Date : 2021-01-19 Li Zhang; Qingxuan Sun; Yongzhen Peng; Haichao Zhao; Han Liu; Yue You; Yanan Zhang
The components and structural characteristics of dissolved organic matter (DOM) in the overlying water were studied using various spectroscopy in Beiyun River. The relationship between the DOM composition and water quality was discussed. The result declared that the overall pollution of the Beiyun River was serious, and that the DOM content of the overlying water was between 9.60 and 28.70 mg/L. The
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Vacuum promoted methane decomposition for hydrogen production with carbon separation: parameter optimization and economic assessment Energy (IF 6.082) Pub Date : 2021-01-25 Zong Chen; Rongjun Zhang; Guofu Xia; Yu Wu; Hongwei Li; Zhao Sun; Zhiqiang Sun
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Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency Energy (IF 6.082) Pub Date : 2021-01-25 Soroush Niazi; Abdolali K. Sadaghiani; Ghazaleh Gharib; Veysel Ogulcan Kaya; Süleyman Çelik; Özlem Kutlu; Ali Koşar
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An effective rolling decomposition-ensemble model for gasoline consumption forecasting Energy (IF 6.082) Pub Date : 2021-01-25 Lean Yu; Yueming Ma; Mengyao Ma
In this paper, an effective rolling decomposition-ensemble model is proposed for quarterly gasoline consumption forecasting in China. In this model, three steps, data decomposition, component prediction and ensemble output, are involved. In the data decomposition, wavelet decomposition and ensemble empirical mode decomposition are used due to few assumptions and excellent performance. In the component
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Identifying drivers for the direct rebound when energy efficiency is unknown The importance of substitution and scale effects Energy (IF 6.082) Pub Date : 2021-01-25 Bente Halvorsen; Bodil Merethe Larsen
The cost reduction resulting from energy efficiency initiatives may induce behavioural changes, which may undermine the energy savings effort embedded in the initiative (referred to as rebound effects). We develop a novel empirical method for illustrating contributions to the direct rebound for cases where the energy efficiency of the equipment is unobservable. Our focus is on substitution and scale
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Energy retrofit of PCM-applied apartment buildings considering building orientation and height Energy (IF 6.082) Pub Date : 2021-01-25 Ji Hun Park; Umberto Berardi; Seong Jin Chang; Seunghwan Wi; Yujin Kang; Sumin Kim
This study analyzed the building energy performance of apartment buildings using retrofit systems with phase change materials (PCMs). The apartment type, building orientation, and height are considered to evaluate the implementation of an innovative PCM system. The building models selected were a flat-type apartment and tower-type apartment. According to the results, building orientation, height floor
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Energy management of controllable loads in multi-area power systems with wind power penetration based on new supervisor fuzzy nonlinear sliding mode control Energy (IF 6.082) Pub Date : 2021-01-16 Mahmoud Elsisi; Najmeh Bazmohammadi; Josep M. Guerrero; Mohamed A. Ebrahim
The distributed controllable loads (DCLs) are employed to achieve energy management for hybrid renewable energy-based multi-area power systems (HREPSs). The DCLs are suggested as a cheaper solution instead of the expensive energy storage systems. Due to the nonlinearity, high variability and uncertain nature of HREPSs based on DCLs, the need for an artificial intelligence-based nonlinear energy management
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Design and development of potassium formate based atmospheric water harvester Energy (IF 6.082) Pub Date : 2021-01-06 Veeresh Ayyagari; Yunho Hwang; Jungho Kim
Potassium formate, the potassium salt of formic acid, is an inexpensive, non-corrosive, non-toxic, and bio-degradable desiccant that has not been considered thus far in atmospheric water harvesting applications.ster is proposed that utilizes an aqueous solution of potassium formate as the medium for moisture absorption during the night when the ambient relative humidity is high, and desorption of absorbed
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A novel adaptive frequency extraction method for fast and accurate connection between inverters and microgrids Energy (IF 6.082) Pub Date : 2021-01-09 Liancheng Xiu; Zhiye Du; BinBing Wu; Guanjun Li; Dongjie Wang; Hanliang Song
Renewable energy is being rapidly developed and extensively utilized, which are commonly interfaced to the microgrids through the inverters. Therefore, the proper and fast extraction of the synchronous phases, frequency and amplitudes of the sequence voltages have brought major requirements under unbalanced and distorted microgrid voltage. In this regard, this paper presents a novel adaptive frequency
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Multi-objective optimization of CO boiler combustion chamber in the RFCC unit using NSGA II algorithm Energy (IF 6.082) Pub Date : 2021-01-15 Alireza Aminmahalati; Alireza Fazlali; Hamed Safikhani
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Impact of replacing ICE bus fleet with electric bus fleet in Africa: A lifetime assessment Energy (IF 6.082) Pub Date : 2021-01-15 G.K. Ayetor; Innocent Mbonigaba; Albert K. Sunnu; Baafour Nyantekyi-Kwakye
It is globally agreed that electrification of the transportation fleet will be a significant step in reducing greenhouse gas emissions. This study assesses the impact of replacing internal combustion engine bus with electric bus fleets in African countries. The assessment includes the impact of solar charging of an electric bus fleet. Emission factors based on the energy mix in the various African
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Optimal sizing and sensitivity analysis of a battery-supercapacitor energy storage system for electric vehicles Energy (IF 6.082) Pub Date : 2021-01-18 Tao Zhu; Richard G.A. Wills; Roberto Lot; Xiaodan Kong; Xingda Yan
This paper presents a sizing method with sensitivity analysis for battery-supercapacitor hybrid energy storage systems (HESSs) to minimize vehicle-lifetime costs. An optimization framework is proposed to solve joint energy management-sizing optimization. Sensitivity analysis is performed using eight parameters of the vehicle, HESS system and components as sensitive factors. We explain why HESS sizing
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Flexible management of heat/electricity of novel PV/T systems with spectrum regulation by Ag nanofluids Energy (IF 6.082) Pub Date : 2021-01-19 Chunxiao Zhang; Chao Shen; Shen Wei; Yingbo Zhang; Cheng Sun
Conventional PV/T systems generally focus on maximizing electricity generation by PV modules only, and they do not balance the generation of electricity and heat for buildings. To match the varying energy demand of buildings, a flexible management method of novel PV/T systems with spectrum regulation was investigated by a 2D-Monte Carlo method. To maximize both electricity and heat generation, 40 nm
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Artificial-neural-network-based model predictive control to exploit energy flexibility in multi-energy systems comprising district cooling Energy (IF 6.082) Pub Date : 2021-01-24 Gianluca Coccia; Alice Mugnini; Fabio Polonara; Alessia Arteconi
District cooling systems (DCSs) belonging to multi-energy systems can be managed by model predictive controls (MPCs) designed to reduce the amount of electrical energy collected from the grid for backup cooling systems when there is a temporal mismatch between energy demand and availability. In this paper, a DCS recovering cold thermal energy from a liquid-to-compressed natural gas fuel station is
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Forecasting seasonal variations in electricity consumption and electricity usage efficiency of industrial sectors using a grey modeling approach Energy (IF 6.082) Pub Date : 2021-01-24 Hai-Bao Chen; Ling-Ling Pei; Yu-Feng Zhao
The aim of this research is to forecast seasonal fluctuations in electricity consumption, and electricity usage efficiency of industrial sectors and identify the impacts of the novel coronavirus disease 2019 (COVID-19). For this purpose, a new seasonal grey prediction model (AWBO-DGGM(1,1)) is proposed: it combines buffer operators and the DGGM(1,1) model. Based on the quarterly data of the industrial
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Probabilistic optimal power flow in islanded microgrids with load, wind and solar uncertainties including intermittent generation spatial correlation Energy (IF 6.082) Pub Date : 2021-01-23 Jithendranath J; Debapriya Das; Josep M. Guerrero
Increased investiture towards Distribution Generation (DG) in recent past had prompted for transmutation of existing networks to form microgrids that can operate autonomously or in conjunction with main-grid. In particular, the augmenting zeal for renewable DGs is thriving at recent times; but non-dispatchability and uncertain nature pose specific challenges, which is the primary concern in this work
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Effect of Microstructure and Contact Interfaces of Cobalt MOFs-derived Carbon Matrix Composite Electrode Materials on Lithium Storage Performance Energy (IF 6.082) Pub Date : 2021-01-23 Guoxu Zheng; Dongxing Wang; Shiyi Tian; Mingyuan Ren; Mingxin Song
Transition metal oxide materials have attracted the attention of researchers due to their advantages, but their development is hindered by structural instability, a small specific surface area and low electrical conductivity.1,2 Porous carbon materials are often used in combination with transition metal oxide materials since they can produce a synergistic effect3. However, the interfacial properties
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Exploring indigenously produced celite-immobilized Rhizopus oryzae NRRL 3562-lipase for biodiesel production Energy (IF 6.082) Pub Date : 2021-01-23 Archana Dash; Rintu Banerjee
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A Multi-Objective Mixed Integer Linear Programming Model for Integrated Electricity-Gas Network Expansion Planning Considering the Impact of Photovoltaic Generation Energy (IF 6.082) Pub Date : 2021-01-23 Hamid Bakhshi Yamchi; Amin Safari; Josep M. Guerrero
This paper presents a new expansion planning model of integrated electricity and gas networks with the high penetration of renewable energy resources, using a multi-objective mixed integer linear programming approach. The proposed method concludes the generation and transmission expansion planning of electricity network and natural gas network expansion planning. Since the outage of natural gas-fired
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The effect of cathode channel blockages on the enhanced mass transfer and performance of PEMFC Energy (IF 6.082) Pub Date : 2021-01-23 Yonghua Cai; Di Wu; Jingming Sun; Ben Chen
The design of flow field has a great influence on the mass transfer and performance of PEMFC (proton exchange membrane fuel cell) and lots of research works focus on this area. In this paper, 3D PEMFC models with a single straight channel are established to investigate the effect of blockages on mass transfer and performance. The influence of cross section shapes of blockages and dimensionless blockage
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Solar-photovoltaic-power-sharing-based design optimization of distributed energy storage systems for performance improvements Energy (IF 6.082) Pub Date : 2021-01-23 Pei Huang; Yongjun Sun; Marco Lovati; Xingxing Zhang
Proper energy storage system design is important for performance improvements in solar power shared building communities. Existing studies have developed various design methods for sizing the distributed batteries and shared batteries. For sizing the distributed batteries, most of the design methods are based on single building energy mismatch, but they neglect the potentials of energy sharing in reducing
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Novel forecast-based dispatch strategy optimization for PV hybrid systems in real time Energy (IF 6.082) Pub Date : 2021-01-23 Carlos D. Rodríguez-Gallegos; Lokesh Vinayagam; Oktoviano Gandhi; Gokhan Mert Yagli; Manuel S. Alvarez-Alvarado; Dipti Srinivasan; Thomas Reindl; S.K. Panda
This paper proposes a new method to optimize the scheduling of off-grid systems composed of solar panels, batteries, and diesel generators in real time. The approach takes into account the load and irradiance forecasted values for the near future to determine the optimal power generation and the operation of the different energy sources which achieve the lowest cost while fulfilling the provided constraints
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Conventional and advanced exergy analyses of a vehicular proton exchange membrane fuel cell power system Energy (IF 6.082) Pub Date : 2021-01-23 Longquan Li; Zhiqiang Liu; Chengwei Deng; Jingzheng Ren; Feng Ji; Yi Sun; Zhenyu Xiao; Sheng Yang
Vehicles powered by proton exchange membrane fuel cell have received lots of attention due to various merits. A comprehensive proton exchange membrane fuel cell power system with parallel-arranged heat recovery strategy for reactants preheating is proposed and investigated. Thermodynamic model of the system is established and is validated rigorously. In order to minimize system total exergy destruction
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Coordinated Scheduling of Generators and Tie Lines in Multi-Area Power Systems under Wind Energy Uncertainty Energy (IF 6.082) Pub Date : 2021-01-23 Heng Zhang; Xiao Hu; Haozhong Cheng; Shenxi Zhang; Shaoyun Hong; Qingfa Gu
A novel stochastic multi-area unit commitment (MAUC) framework is proposed to coordinate scheduling of generators and tie lines. In consideration of the randomness and volatility characteristics of wind energy, a worst-case based scenario selection method (SSM) based on the peak and valley shaving of the system, the ramping-up/down rates of net load, and the dispersion of uncertainty factors is presented
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High Performance of Multi-Layered Triboelectric Nanogenerators for Mechanical Energy Harvesting Energy (IF 6.082) Pub Date : 2021-01-23 Adem Yar
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Efficiency of China’s carbon market: A case study of Hubei pilot market Energy (IF 6.082) Pub Date : 2021-01-23 Yingqi Chen; Shusong Ba; Qing Yang; Tian Yuan; Haibo Zhao; Ming Zhou; Pietro Bartocci; Francesco Fantozzi
Better understanding the carbon market can instruct further reforms to perfect its functionality, market efficiency is a key indicator to uncover its current performance. Previous studies have revealed foregone carbon market efficiency; however, given the dynamics of market, it merits the significance to track the up-to-date status. This paper specifically studies the Hubei pilot carbon market, which
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A comprehensive experimental investigation of low-temperature combustion with thick thermal barrier coatings Energy (IF 6.082) Pub Date : 2021-01-23 Ziming Yan; Brian Gainey; James Gohn; Deivanayagam Hariharan; John Saputo; Carl Schmidt; Felipe Caliari; Sanjay Sampath; Benjamin Lawler
Thick thermal barrier coatings (TBCs) have a significant potential to increase thermal efficiency by reducing heat transfer losses. However, in conventional combustion modes, the drawbacks associated with charge heating and higher propensity to knock have outweighed the efficiency benefits. Since the advanced low-temperature combustion (LTC) concepts are fundamentally different from the conventional
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Performance Analysis of a 550MWe Solid Oxide Fuel Cell and Air Turbine Hybrid System Powered by Coal-Derived Syngas Energy (IF 6.082) Pub Date : 2021-01-23 Xinfang Jin; Anthony Ku; Brandon Ohara; Kevin Huang; Surinder Singh
We here present and analyze a novel conceptual design of 550 MW-level, syngas-fueled intermediate-temperature solid oxide fuel cell (SOFC)/Air Turbine (AT) hybrid system with an oxy-fuel combustion. To decouple the operation of SOFC and AT and allow independent operation of each, an intermediate heat exchanger is implemented between SOFC and AT cycles to transfer only heat from SOFC to AT. To facilitate
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Optimal injection timing and gas mixture proportion for enhancing coalbed methane recovery Energy (IF 6.082) Pub Date : 2021-01-23 Zhanglei Fan; Gangwei Fan; Dongsheng Zhang; Lei Zhang; Shuai Zhang; Shuaishuai Liang; Wei Yu
Optimal injection timing and gas mixture proportion have great influence on CO2 geological sequestration and improvement of recovery. The refined Thermo-hydro-mechanical (THM) coupling model including an improved permeability model was first validated by matching with historical data, and then applied to the simulation of gas mixture enhanced coalbed methane recovery (GM-ECBM). Results show that higher
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Sector-by-sector non-renewable energy consumption shocks and manufacturing performance of the U.S.: Analysis of the asymmetric issue with nonlinear ARDL and the role of structural breaks Energy (IF 6.082) Pub Date : 2021-01-23 Oluwasegun B. Adekoya; Timilehin P. Ogunnusi; Johnson A. Oliyide
Despite the numerous studies on the nexus between energy consumption and macroeconomic indicators in the United States (U.S.), this study still finds some notable gaps. Hence, it contributes to the literature in a number of ways. First, it comparatively examines the response of the manufacturing performance of the U.S. to sectoral energy consumption unlike existing studies that have largely been on
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News-based Equity Market Uncertainty and Crude Oil Volatility Energy (IF 6.082) Pub Date : 2021-01-23 Anupam Dutta; Elie Bouri; Tareq Saeed
Previous studies indicate that the US equity market implied volatility index (VIX) impacts the crude oil market volatility. However, the VIX typically reflects macroeconomic fluctuations, little affected by social media or investor perception changes. In this paper, we use recently introduced news-based equity market volatility (EMV) trackers to examine their impacts on crude oil volatility in its
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