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Evolutionary shuffled frog leaping with memory pool for parameter optimization Energy Rep. (IF 3.595) Pub Date : 2021-01-21 Yun Liu; Ali Asghar Heidari; Xiaojia Ye; Chen Chi; Xuehua Zhao; Chao Ma; Hamza Turabieh; Huiling Chen; Rongrong Le
According to the manufacturer’s I-V data, we need to obtain the best parameters for assessing the photovoltaic systems. Although much work has been done in this area, it is still challenging to extract model parameters accurately. An efficient solver called SFLBS is developed to deal with this problem, in which an inheritance mechanism based on crossover and mutation is introduced. Specifically, the
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Experimental optimization of engine performance of a dual-fuel compression-ignition engine operating on hydrogen-compressed natural gas and Moringa biodiesel Energy Rep. (IF 3.595) Pub Date : 2021-01-21 Babalola Aisosa Oni; Samuel Eshorame Sanni; Anayo Jerome Ibegbu; Ameloko Anthony Aduojo
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A robust parameter estimation approach based on stochastic fractal search optimization algorithm applied to solar PV parameters Energy Rep. (IF 3.595) Pub Date : 2021-01-22 Hegazy Rezk; Thanikanti Sudhakar Babu; Mujahed Al-Dhaifallah; Hamdy A. Ziedan
Modeling of solar photovoltaic (PV) cell/modules to estimate its parameters with the measured current–voltage (I–V ) values is a very important issue for the control, optimization, and effectiveness of the PV systems. Therefore, in this research work, a robust approach based on Stochastic Fractal Search (SFS) optimization algorithm is introduced to estimate accurate and reliable values of solar PV
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Predicting the energy output of hybrid PV–wind renewable energy system using feature selection technique for smart grids Energy Rep. (IF 3.595) Pub Date : 2021-01-21 Zakria Qadir; Sara Imran Khan; Erfan Khalaji; Hafiz Suliman Munawar; Fadi Al-Turjman; M.A. Parvez Mahmud; Abbas Z. Kouzani; Khoa Le
In the current technological era, predicting the power and energy output based on the changing weather factors play an important role in the economic growth of the renewable energy sector. Unlike traditional fossil fuel-based resources, renewable energy sources potentially play a pivotal role in sustaining a country’s economy and improving the quality of life. As our planet is nowadays facing serious
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Modelling and analysis of the influence of solar spectrum on the efficiency of photovoltaic modules Energy Rep. (IF 3.595) Pub Date : 2021-01-20 Tadeusz Rodziewicz; Małgorzata Rajfur; Janusz Teneta; Paweł Świsłowski; Maria Wacławek
The article presents the influence of changes in the solar radiation spectrum distribution on the properties of various photovoltaic modules, with particular emphasis on the scattered component. We compared the relative efficiency of the photovoltaic modules based on various semiconductor absorbers during bright and sunny, and cloudy summer days. Additionally, we presented the impact of the module
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Efficiency enhancement of an air-conditioner utilizing nanofluids: An experimental study Energy Rep. (IF 3.595) Pub Date : 2021-01-20 Faizan Ahmed; Waqar Ahmed Khan
This paper presents a novel idea of utilizing nanofluid as external cooling jacket around the condenser of an air conditioner. Experimental investigations were carried out to study the influence of two types of nanofluids namely, copper and aluminum oxide nanofluids on the performance of an air conditioner. The nanofluids were used to enhance the heat transfer by means of providing an external nanofluid
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Characteristics of the fracture geometry and the injection pressure response during near-wellbore diverting fracturing Energy Rep. (IF 3.595) Pub Date : 2021-01-18 Bo Wang; Fujian Zhou; Hang Zhou; Hui Ge; Lizhe Li
Near-wellbore diverting fracturing (NWDF) can successfully generate new diverting fractures and dramatically enhance the stimulation effects for vertical wells. Investigating the fracture geometry and the injection pressure response is necessary for the candidate well selection and the stimulation effect evaluation. This work establishes a fully fluid–solid coupling model to simulate the process of
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Can sharing economy mode advance the transition of China’s energy sector effectively: A case of PV technology transition? Energy Rep. (IF 3.595) Pub Date : 2021-01-18 Jianchao Hou; Min Wang; Pingkuo Liu
Driven by the development of global Energy Internet and the requirement of energy transition, the sharing economy mode in energy sector has turned into a novel inspiration. This paper aims to explore whether the sharing economy model advance China’s energy transition effectively. We describe the system of Energy with Uber-like mode, and introduce the Uber-like Mode into the PV power sector. By using
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Optimal generation expansion planning model of a combined thermal–wind–PV power system considering multiple boundary conditions: A case study in Xinjiang, China Energy Rep. (IF 3.595) Pub Date : 2021-01-18 Yu Li; Mei Dai; Songtao Hao; Gang Qiu; Guoqing Li; Guilian Xiao; Dagui Liu
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Microwave pyrolysis and its applications to the in situ recovery and conversion of oil from tar-rich coal: An overview on fundamentals, methods, and challenges Energy Rep. (IF 3.595) Pub Date : 2021-01-18 Yang Ju; Yan Zhu; Hongwei Zhou; Shirong Ge; Heping Xie
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EER or Fcsp: A performance analysis of fixed and variable air conditioning at different cooling thermal conditions Energy Rep. (IF 3.595) Pub Date : 2021-01-19 Ángel Andrade; Álvaro Restrepo; Juan E. Tibaquirá
This study explores a performance analysis of variable and fixed types of air conditioning equipment at different thermal load conditions using the cooling seasonal performance factor (FCSP) evaluation method (ISO 16358-1:2013), and the energy efficiency ratio (EER) evaluation method (ISO 5151:2017) which are applied to tropical climates. There are currently several types of energy efficiency evaluation
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Exergoeconomic Analysis of a Novel Hybrid System by Integrating the Kalina and Heat Pump Cycles with a Nitrogen Closed Brayton System Energy Rep. (IF 3.595) Pub Date : 2021-01-19 Alireza Pirmohamadi; Hadi Ghaebi; Behrooz M. Ziapour; Mohammad Ebadollahi
In recent years, attentions are focused on the application of cutting-edge reactors to utilize the remarkable virtues such as safety and also higher thermal efficiency. Sodium-cooled fast reactors (SFRs) are midst the promising types of fourth generation reactors for their non-reacting behavior and packed configurations, which are considered as heat source of various thermodynamic systems. Accordingly
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Effect of primary and secondary alcohols as oxygenated additives on the performance and emission characteristics of diesel engine Energy Rep. (IF 3.595) Pub Date : 2021-01-19 M.A. Mujtaba; Haeng Muk Cho; H.H. Masjuki; M.A. Kalam; M. Farooq; Manzoore Elahi M. Soudagar; M. Gul; Asif Afzal; Waqar Ahmed; Asad Raza; T.M. Yunus Khan; Shahid Bashir; Zeeshan Ahmad
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Renewable energy systems based on micro-hydro and solar photovoltaic for rural areas: A case study in Yogyakarta, Indonesia Energy Rep. (IF 3.595) Pub Date : 2021-01-15 Ramadoni Syahputra; Indah Soesanti
This paper presents renewable energy systems based on micro-hydro and solar photovoltaic for rural areas, with a case study in Yogyakarta, Indonesia. The Special Region of Yogyakarta, located on the island of Java, Indonesia, has a high potential for the development of renewable energy resources, especially hydropower and solar power. Many rural areas in Yogyakarta lack a supply of electricity. In
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Numerical analysis of hydraulic fracturing processes for multi-layered fractured reservoirs Energy Rep. (IF 3.595) Pub Date : 2021-01-14 Caiyuan Xiao; Guiju Zhang; Yudong Yu
Accurate simulation of Hydraulic fracturing in naturally fractured reservoirs significantly impacts the prediction of the fracturing treatment process. The objective of this study is to numerically analyze the hydraulic fracturing processes in a multi-layered fractured reservoir. Therefore, mechanical mass balance equations for fluids, solids, and their interactions with produced fractures were simultaneously
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Sensorless parameter estimation of VFD based cascade centrifugal pumping system using automatic pump curve adaption method Energy Rep. (IF 3.595) Pub Date : 2021-01-13 Arun Shankar V.K.; Umashankar Subramaniam; Rajvikram Madurai Elavarasan; Kannadasan Raju; Paramasivam Shanmugam
The Sustainable Development Goal 7 necessitates efficient energy utilization and aligning energy efficiency targets to industrial machines would pave a way for prospective developments. Pumps are inevitable in commercial and industrial sectors and they contribute to nearly 22% of the global industrial energy utilization. Attesting the fact, this paper focuses on the energy-efficient operation of a
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Performance comparison of annular and flat-plate thermoelectric generators for cylindrical hot source Energy Rep. (IF 3.595) Pub Date : 2021-01-12 Mengjun Zhang; Junli Wang; Yuanyuan Tian; Yajie Zhou; Jia Zhang; Huaqing Xie; Zihua Wu; Wenqin Li; Yuanyuan Wang
Utilizing the heat energy of exhaust gases is a promising application of thermoelectric generator (TEG), which can convert low grade thermal energy into electricity. The annular thermoelectric generator (ATEG) is thought to be much more feasible for cylindrical heat source compared to the flat-plate thermoelectric generator (FTEG) in reference to the compatibility. Nevertheless, the quantitative comparison
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Dual-transformer-based hybrid resonant three-level ZCS converter Energy Rep. (IF 3.595) Pub Date : 2021-01-12 Syed Waqar Azeem; Kashif Mehmood; Khalid Mehmood Cheema; Muhammad Faizan Tahir; Ahmed M. El-Sherbeeny
A hybrid resonant three-level converter comprised of dual transformers is proposed in this paper, which is suitable for the application of distributed photovoltaic power accessing the medium voltage dc distribution network. The proposed converter can be obtained by adding a control circuit into the traditional neutral point clamped (NPC) three-level (TL) circuit, achieving the basic TL circuit operating
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Improvement on energy consumption of a refrigerator within PV system including battery storage Energy Rep. (IF 3.595) Pub Date : 2021-01-12 Ahmad H. Sabry; Pin Jern Ker
Refrigerators consume significantly high energy and the improvement on their efficiency is essential to minimize greenhouse gas emission. Understanding the power consumption patterns of refrigerators is a key element that is not thoroughly studied, especially in domestic PV system with an integrated battery-storage. Therefore, the main objective of the study is to develop strategies in decreasing the
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Characterizing the potential and suitability of Ethiopian variety Jatropha curcas for biodiesel production: Variation in yield and physicochemical properties of oil across different growing areas Energy Rep. (IF 3.595) Pub Date : 2021-01-12 Gebresilassie Asnake Ewunie; Odd Ivar Lekang; John Morken; Zerihun Demrew Yigezu
The increased cost of biodiesel production from edible oils has motivated the researchers to find alternative non-edible oil feedstocks. Jatropha curcas has been identified as a promising tropical and subtropical perennial energy crop for biodiesel production. However, securing adequate J. curcas oil for sustainable biodiesel production is not achieved yet. Therefore, the present study sought to investigate
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Effect of working fluids on the performance of phase change material storage based direct vapor generation solar organic Rankine cycle system Energy Rep. (IF 3.595) Pub Date : 2021-01-08 Jahan Zeb Alvi; Yongqiang Feng; Qian Wang; Muhammad Imran; Gang Pei
Working fluids can play a critical role in the working of an organic Rankine cycle system. A direct vapor generation solar organic Rankine cycle embedded with phase change material storage is analyzed in this study. The system comprised of an array of evacuated flat plate collectors, phase change material based thermal storage, expander, condenser, and organic working fluid pump. The storage tank model
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Comprehensive evaluation of concentrated solar collector and Organic Rankine cycle hybrid energy process with considering the effects of different heat transfer fluids Energy Rep. (IF 3.595) Pub Date : 2021-01-08 Kai Sun; Tuo Zhao; Shuoyan Wu; Shengming Yang
Solar energy based power generation systems can reduce pollutants emissions by reducing fossil fuel consumption. A new option for this idea is the Organic Rankine cycle coupled with a concentrating solar collector. The present study provides the Organic Rankine cycle performance using energy, exergy and economic approaches, selecting the appropriate operating fluid for the cycle consisting of Organic
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Forecast of the hydropower generation under influence of climate change based on RCPs and Developed Crow Search Optimization Algorithm Energy Rep. (IF 3.595) Pub Date : 2021-01-08 Qizi Huangpeng; Wenwei Huang; Fatemeh Gholinia
The world’s climate has changed dramatically in recent years due to the development of the industry. Climate change can significantly affect hydropower plants. One of the negative effects of climate change is the reduction of hydropower generation. Therefore, to better management of power supply and demand, the climate change effect on hydropower plants should be examined. The main purpose of this
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An adaptive Marine Predators Algorithm for optimizing a hybrid PV/DG/Battery System for a remote area in China Energy Rep. (IF 3.595) Pub Date : 2021-01-09 Guoqing Yu; Zhiyong Meng; Hongtao Ma; Lei Liu
Lack of electricity networks in remote areas and also the high cost of connecting these areas to national networks due to the unfavorable geographical situation of the region leads to the use of other energy sources independent of the network in these areas. Today, the use of distributed generation sources is increasing due to the reduction of fossil fuel sources and heat problems. The output power
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Performance study on a stepped flow field design for bipolar plate in PEMFC Energy Rep. (IF 3.595) Pub Date : 2021-01-08 Xi Chen; Yao Chen; Qian Liu; Jianghai Xu; Qinxiao Liu; Wenbin Li; Yan Zhang; Zhongmin Wan; Xiaodong Wang
In order to solve the problems of non-uniform gas concentration distribution and serious flooding in the parallel flow field of traditional PEMFC, a stepped flow field of PEMFC bipolar plate is proposed in this paper. The gas concentration distribution, velocity distribution, liquid water distribution and current density distribution of traditional parallel flow field and stepped flow fields are studied
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Recognition of pollution layer location in 11 kV polymer insulators used in smart power grid using dual-input VGG Convolutional Neural Network Energy Rep. (IF 3.595) Pub Date : 2021-01-07 B. Vigneshwaran; R.V. Maheswari; L. Kalaivani; Vimal Shanmuganathan; Seungmin Rho; Seifedine Kadry; Mi Young Lee
This paper portrays the application of a Partial Discharge (PD) signal combined with the dual-input VGG Convolution Neural Network (CNN) to predict the location of the pollution layer on 11 kV polymer insulators subjected to alternating current for smart grid applications. First, a non-uniform pollution layer artificially created for HV insulator with three straight shed ball end fitting in a laboratory
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A grasshopper optimization algorithm for optimal short-term hydrothermal scheduling Energy Rep. (IF 3.595) Pub Date : 2021-01-04 Xie Zeng; Ali Thaeer Hammid; Nallapaneni Manoj Kumar; Umashankar Subramaniam; Dhafer J. Almakhles
The optimal generation for short-term hydrothermal scheduling (OGStHS) with the deliberation of various purposes is a complex non-linear constrained optimization problem. There exist numerous constraints, which make the OGStHS optimization problem more complicated. The considered constraints for this problem are mostly related to energy performance, operational conditions, water, and power infrastructure
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Design and control challenges of hybrid, dual nozzle gas turbine power generating plant: A critical review Energy Rep. (IF 3.595) Pub Date : 2021-01-04 Frank Kulor; Elisha Didam Markus; Kusakana Kanzumba
The provision of sustainable energy is one of the critical challenges currently facing the power sector and gas turbine power production has established itself as one of the more viable sources of reliable energy. However, the cost of electricity produced from the contemporary gas turbine power plants using diesel fuel technology remains considerably high, irrespective of enormous progress, and related
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Economic growth efficiency and carbon reduction efficiency in China: Coupling or decoupling Energy Rep. (IF 3.595) Pub Date : 2021-01-04 Pengfei Sheng; Jun Li; Mengxin Zhai; Muhammad Umer Majeed
The size of global and China’s economy expanded rapidly in recent years, and working on emission of carbon dioxide increased due to environmental change. The relationship between decoupling, economic growth and carbon dioxide emissions has been examined extensively, but economic growth efficiency can decouple from carbon reduction efficiency is less explore area specially in country like China. Our
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Multi-objective optimization of regenerative ORC system integrated with thermoelectric generators for low-temperature waste heat recovery Energy Rep. (IF 3.595) Pub Date : 2021-01-04 Mohammad Aliahmadi; Ali Moosavi; Hani Sadrhosseini
Three novel geothermal-based organic Rankine cycle (ORC) systems are proposed to enhance the efficiency and for waste heat recovery purpose. The proposed systems are modeled based on a basic ORC system (concept 1), an ORC system with an internal heat exchanger (concept 2), and a regenerative ORC system (concept 3). Accordingly, two thermoelectric generators (TEG) are introduced into the systems to
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Interactive, bottom-up model to audit the true per-person energy consumption (direct and embedded) of Irish citizens per annum Energy Rep. (IF 3.595) Pub Date : 2020-12-28 Barry Brophy; Eoin McCormack; William Smith; David Timoney
A per-person energy consumption model was created which can estimate the energy consumed by the average Irish citizen based on user-entered characteristics. The model is built almost entirely on a bottom-up approach which gives a better understanding of energy consumption on a per-person basis than the currently available per-capita estimates. It was found that the average Irish person consumes 69
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Dual-hazard control mechanism of burst-prone and spontaneous combustion coalface considering effect of retreat speed Energy Rep. (IF 3.595) Pub Date : 2020-12-25 Shizhong Zhang; Gangwei Fan; Shuyin Jiang; Zhanglei Fan; Shaodong Li; Huining Ni
For longwall top coal caving coalface characterized by strong rock burst tendency and high risk of spontaneous combustion, retreat speed is one of the key factors to induce the rock burst and spontaneous combustion of residual coal in goaf. A high retreat speed may lead to violent roof activity and impact dynamic load, which aggravates the tendency of rock burst. A low retreat speed may lead to spontaneous
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Techno-economic assessment of biodiesel production from canola oil through ultrasonic cavitation Energy Rep. (IF 3.595) Pub Date : 2020-12-24 Ali Gholami; Fathollah Pourfayaz; Akbar Maleki
The immiscibility of oil and alcohol is a severe issue in biodiesel production as it causes a low mass transfer rate and long reaction time. This problem can be overcome by incorporating the intensification method, which significantly increases the contact surface area of oil and alcohol through various techniques. In recent years, ultrasonic cavitation has emerged as one of the most effective ways
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Energy consumption analysis of a parallel PHEV with different configurations based on a typical driving cycle Energy Rep. (IF 3.595) Pub Date : 2020-12-23 Hai Liu; Jingyu Zhao; Tong Qing; Xiaoyu Li; Zaizhou Wang
Representative driving cycles and specific vehicle types play an important role in analyzing energy consumption to provide valuable references for manufacturers and government inspections. In this study, a parallel plug-in hybrid electric vehicle with different driven configurations is employed to analyze energy consumption under a typical driving cycle. Specifically, a typical driving cycle of Tianjin
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Optimal long-term prediction of Taiwan’s transport energy by convolutional neural network and wildebeest herd optimizer Energy Rep. (IF 3.595) Pub Date : 2020-12-21 Shunyu Yao; Yi-Peng Xu; Ehsan Ramezani
In this paper, an optimized model based on Convolutional neural network (CNN) models is proposed for transport energy forecasting in Republic of China (Taiwan). This study employs various self-reliant parameters including individual, gross domestic product, vehicle registrations’ number, value of passenger transport, and oil price for modeling. To provide an optimized result of CNN, it is combined
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Delayed dynamic step shuffling frog-leaping algorithm for optimal design of photovoltaic models Energy Rep. (IF 3.595) Pub Date : 2020-12-21 Yi Fan; Pengjun Wang; Ali Asghar Heidari; Xuehua Zhao; Hamza Turabieh; Huiling Chen
Developing an accurate mathematical model is an essential tool for studying and optimizing the performance of the photovoltaic cell system (PV). Transforming the PV problem into an optimization problem in which meta-heuristic algorithms excel provides an alternative approach to identifying the PV model’s parameters. The memetic evolution mechanism and the shuffling strategy included in the shuffling
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Technical-economical analysis of anaerobic digestion process to produce clean energy Energy Rep. (IF 3.595) Pub Date : 2020-12-21 T.H. Chowdhury
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Optimal control of high-power density hybrid electric vehicle charger Energy Rep. (IF 3.595) Pub Date : 2020-12-19 Tehzeeb-ul Hassan; Khalid Mehmood Cheema; Kashif Mehmood; Muhammad Faizan Tahir; Ahmad H. Milyani; Muhammad Akhtar
This research utilizes a hybrid technology through resonant line-level control phase-shifted full-bridge (HR-LLC-PSFB) dc–dc converter. In this research, a line level control (LLC) auxiliary circuit is used to achieve zero-current soft-switching turned-off operation of a controlled switch. The zero-voltage soft-switching turned-on operation is achieved by using the transformers’ magnetic branch energy
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Optimal sizing and sitting of EVCS in the distribution system using metaheuristics: A case study Energy Rep. (IF 3.595) Pub Date : 2020-12-19 Liang Chen; Chunxiang Xu; Heqing Song; Kittisak Jermsittiparsert
In this study, a new optimal allocation and sizing have been proposed for an Electric Vehicle Charging Station (EVCS) on a Distribution System in Allahabad, India. The main idea is to optimize the EVCS configuration by considering Voltage Profile Improvement Index (VPII), Reactive Power Loss Reduction Index (QLRI), Real Power Loss Reduction Index (PLRI), and the preliminary development cost to get
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Effect of alcoholic and nano-particles additives on tribological properties of diesel–palm–sesame–biodiesel blends Energy Rep. (IF 3.595) Pub Date : 2020-12-17 M.A. Mujtaba; Haeng Muk Cho; H.H. Masjuki; M.A. Kalam; M. Farooq; Manzoore Elahi M. Soudagar; M. Gul; Waqar Ahmed; Asif Afzal; Shahid Bashir; V. Dhana Raju; Haseeb Yaqoob; A.Z. Syahir
This study focused on evaluating the lubricity of diesel–biodiesel fuel with oxygenated alcoholic and nano-particle additives. Fuel injection system lubrication depended primarily on the fuel used in the diesel engine. Palm–sesame oil blend was used to produce biodiesel using the ultrasound-assisted technique. B30 fuel sample as a base fuel was blended with fuel additives in different proportions prior
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Gas seepage characteristics of loaded coal under negative suction pressure Energy Rep. (IF 3.595) Pub Date : 2020-12-17 Xiang-Chun Li; Jia-Xing Gao; Qi Zhang; Zhong-Bei Li; Lei Xie; Fan Zhang
ANSYS was used in this study to simulate the change in permeability of loaded coal under negative pressure. The ANSYS transient structural module was employed to simulate the coal loading conditions and to calculate the coal volumetric strain and coal porosity change. In the ANSYS Fluent module, the porosity of the porous medium was changed to replace the coal deformation, and the outlet pressure was
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A long-distance high-power microwave wireless power transmission system based on asymmetrical resonant magnetron and cyclotron-wave rectifier Energy Rep. (IF 3.595) Pub Date : 2020-12-17 Biao Hu; Hao Li; Tianming Li; Haiyang Wang; Yihong Zhou; Xiaoyun Zhao; Xin Hu; Xuekun Du; Yulong Zhao; Xiang Li; Tian Qi; Mohamed Helaoui; Wenhua Chen; Fadhel Ghannouchi
This paper demonstrates the analysis of a long-distance high-power microwave wireless power transmission (MWPT) system based on asymmetrical resonant magnetron and cyclotron-wave rectifier. In the system, the novel magnetron with the asymmetrical resonant cavity, the straps, and the output loop coupling circuit can effectively promote the beam–wave interaction, suppress the mode competition, and enhance
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RAM analysis and availability optimization of thermal power plant water circulation system using PSO Energy Rep. (IF 3.595) Pub Date : 2020-12-17 Hanumant P. Jagtap; Anand K. Bewoor; Ravinder Kumar; Mohammad Hossein Ahmadi; Mamdouh El Haj Assad; Mohsen Sharifpur
This paper presents reliability, availability, and maintainability (RAM) analysis framework for evaluating the performance of a circulation system of water (WCS) used in a coal-fired power plant (CFPP). The performance of WCS is evaluated using a reliability block diagram (RBD), fault tree analysis (FTA), and Markov birth–death probabilistic approach. In this work, the system under study consists of
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A conceptual efficient design of energy recovery systems using a new energy-area key parameter Energy Rep. (IF 3.595) Pub Date : 2020-12-17 Ibrahim H. Alhajri; Mamdouh A. Gadalla; Hany A. Elazab
Energy integration in petrochemical and refining industries is an effective concept to minimize dependence on heating and cooling utilities through networks of exchanger equipment. Pinch Analysis is very popular and successful technique to optimize heat recovery between heat sources and sinks. Yet, design of networks of exchangers is challenging and requires careful attention to energy consumption
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Short-term wind speed prediction using Extended Kalman filter and machine learning Energy Rep. (IF 3.595) Pub Date : 2020-12-16 Sung-ho Hur
Wind speed prediction could play an important role in improving the performance of wind turbine control and condition monitoring. For example, by predicting or forecasting the upcoming wind in advance, fluctuations in wind power output in above rated wind speed could be reduced without causing an increase in pitch activity, and anomalies such as an extreme gust could be detected before it reaches the
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Thermodynamic and feasibility analysis of air conditioning waste heat recovery via power generation cycles Energy Rep. (IF 3.595) Pub Date : 2020-12-15 Zhanying Zheng; Jingyu Cao
Waste heat from Air Conditioning (AC) systems has long been neglected as a heat source for power generation. With the increasing AC demand worldwide, relevant technology development are urgently required. In this study, four different combined systems have been proposed for AC waste heat conversion. Power generation modules are based on organic Rankine cycle (ORC), organic flash cycle (OFC), Kalina
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An electricity load forecasting model for Integrated Energy System based on BiGAN and transfer learning Energy Rep. (IF 3.595) Pub Date : 2020-12-15 Dengji Zhou; Shixi Ma; Jiarui Hao; Dong Han; Dawen Huang; Siyun Yan; Taotao Li
Integrated Energy System (IES) is able to collaborate various energy systems and boost energy supply efficiency. To further facilitate the energy scheduling in IES, load forecasting model of the system is required to describe the conditions continuously on a future time span. While the IES is a service model with frequent in-and-out users which are always dynamically changed, thus the dataset for some
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Survey-based air-conditioning demand response for critical peak reduction considering residential consumption behaviors Energy Rep. (IF 3.595) Pub Date : 2020-12-14 Zihang Zhang; Peng Zhang; Yuan Zhao; Xiaodong Chen; Zheng Zong; Kai Wu; Jun Zhou
This work is a combined study of the economics-based customer survey and demand response (DR) optimization. We present a methodology to capture the customers’ behavior and thermal parameter differences within the decision-making of the voluntary air-conditioning DR program for critical peak reduction. Firstly, we developed a face-to-face survey based on the contingent valuation method (CVM) to investigate
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A low-grade heat Organic Rankine Cycle driven by hybrid solar collectors and a waste heat recovery system Energy Rep. (IF 3.595) Pub Date : 2020-12-13 Mohamed R. Gomaa; Ramadan J. Mustafa; Mujahed Al-Dhaifallah; Hegazy Rezk
Against the backdrop of the ever growing scientific and public interest in locating alternative sources of clean energy, geared toward the overarching objective of mitigating the harmful implications of greenhouse effects on the environment, this paper proposes one such alternative. In capturing the environmental benefits to be gained from waste heat recovered during a cement industrial process, this
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Performance evaluation of cellulose fiber’s effectiveness as a thermal insulation material for productive biogas systems Energy Rep. (IF 3.595) Pub Date : 2020-12-11 Edmund Tumusiime; John B. Kirabira; Wilson B. Musinguzi
Cellulose fiber (CF) is a cost-effective and eco-friendly thermal insulation material which has largely found its application in the construction industry to provide wall insulation in residential and commercial buildings. Biogas digesters too are constructed with walls which should be insulated to limit digester temperature fluctuations which are unfavorable for methane formation. The objective of
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The theoretical potential for large-scale underground thermal energy storage (UTES) within the UK Energy Rep. (IF 3.595) Pub Date : 2020-12-09 J.G. Gluyas; C.A. Adams; I.A.G. Wilson
Large scale storage of heat is critical for the successful decarbonisation of the UK’s energy mix and for grid-balancing. Heat generation currently accounts for 50% of all energy use in the UK and most of this is produced by burning fossil natural gas. Heat is regarded as a single-use commodity, discarded or dissipated when not required in summer yet a lifesaving necessity during the colder winter
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Pyrolysis characteristics and kinetics of human faeces, simulant faeces and wood biomass by thermogravimetry–gas chromatography–mass spectrometry methods Energy Rep. (IF 3.595) Pub Date : 2020-12-09 Tosin Somorin; Alison Parker; Ewan McAdam; Leon Williams; Sean Tyrrel; Athanasios Kolios; Ying Jiang
Human faeces (HF) are treated as wastes in many parts of the world, a resource that can be converted to energy and fuels. To enhance the understanding of fuel conversion processes and decomposition characteristics, this study investigated the pyrolysis behaviour and evolved gas profiles of HF using thermogravimetry with gas chromatography–mass spectrometry methods. Kinetic parameters were deduced using
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Performance of solar pond integrated with photovoltaic/thermal collectors Energy Rep. (IF 3.595) Pub Date : 2020-12-09 Manar M. Ali; Omer K. Ahmed; Ehsan F. Abbas
This article aims to propose and study a new system design for renewable energy called photovoltaic/ solar pond. This new system involves cooling the arrays of the photovoltaic/thermal collectors, which are installed beside the salinity gradient solar pond with a heat exchanger that is installed behind each solar cell. Thermal energy gained by the photovoltaic/thermal collectors was stored in the heat
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Optimal design of a micro combined CHP system applying PEM fuel cell as initial mover with utilization of Developed Pathfinder Optimizer Energy Rep. (IF 3.595) Pub Date : 2020-12-08 Rulin Bai; Kittisak Jermsittiparsert
The use of Combined Cooling, Heating, and Power (CHP) system, as one of the possible solutions to increase efficiency and to reduce environmental pollution, is rapidly increasing in residential units. The primary mover of combined CHP-based buildings can be based on gas-burning engine, micro-turbine, fuel cell (FC), or a sterling engine. Characteristics such as higher effectiveness, very lower pollution
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Particle swarm optimised fuzzy controller for charging–discharging and scheduling of battery energy storage system in MG applications Energy Rep. (IF 3.595) Pub Date : 2020-12-08 M. Faisal; M.A. Hannan; Pin J. Ker; M.S.Abd. Rahman; R.A. Begum; T.M.I. Mahlia
Aiming at reducing the power consumption and costs of grids, this paper deals with the development of particle swarm optimisation (PSO) based fuzzy logic controller (FLC) for charging–discharging and scheduling of the battery energy storage systems (ESSs) in microgrid (MG) applications. Initially, FLC was developed to control the charging–discharging of the storage system to avoid mathematical calculation
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Optimal integration of distributed generation resources in active distribution networks for techno-economic benefits Energy Rep. (IF 3.595) Pub Date : 2020-12-07 Ahmed S. Hassan; ElSaeed A. Othman; Fahmy M. Bendary; Mohamed A. Ebrahim
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Power generation cost minimization of the grid-connected hybrid renewable energy system through optimal sizing using the modified seagull optimization technique Energy Rep. (IF 3.595) Pub Date : 2020-12-07 Gang Lei; Heqing Song; Dragan Rodriguez
A hybrid renewable power system is studied in this paper. This system is composed of PV panels, wind turbines, inverter, rectifier, electrolyzer, and fuel cell such that it prioritizes storing excess energy by converting it to hydrogen and using it later in the fuel cell. Additional extra generation power is sold to the main electricity network. The system generates power from clean sources and has
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Harvesting solar energy onboard LTA systems: Modeling and design Energy Rep. (IF 3.595) Pub Date : 2020-12-07 Sowmya Gupta; Chinmay Rajhans; Siddhartha P. Duttagupta
In the present scenario, solar-powered Lighter-Than-Air-Platforms (LTAPs) find wide applications in the field of surveillance, air monitoring, line of sight communication, mapping of the earth’s topography. Accordingly, there are specified power requirements for the sensors integrated on such systems. A helium-gas filled LTA system may be an airship or tactical aerostat with variable size depending
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Research on vibration isolation method of a novel power source Energy Rep. (IF 3.595) Pub Date : 2020-12-04 Jingyi Tian; Huihua Feng; Jifu Wang; Yucong Liu
Free-piston linear generator (FPLG) is a novel power source which combines free-piston engines and a linear electric generator. Piston motion and vibration excitation characteristics of FPLG are quite different from the traditional reciprocating engines. This paper aims to clarify the vibration excitation mechanism of FPLG and propose an effective vibration isolation method. The dynamic simulation
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Self-assembly of Ni–Fe layered double hydroxide at room temperature for oxygen evolution reaction Energy Rep. (IF 3.595) Pub Date : 2020-12-04 Seong Hyun Kim; Yoo Sei Park; Chiho Kim; Il Yeong Kwon; Jooyoung Lee; Hyunsoo Jin; Yoon Seok Lee; Sung Mook Choi; Yangdo Kim
Active and stable electrocatalysts are the key to water electrolysis for hydrogen production. This paper reports a facile direct growth method to synthesize NiFe-layered double hydroxides (LDHs) on nickel foil as an electrocatalyst for the oxygen evolution reaction. The NiFe-LDH is synthesized by a galvanic process at room temperature without any additional energy for synthesis. The synthesized NiFe-LDH
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