Energy Conversion and Management最新文献_第3页

Realizing hybrid electrical and thermal energy storage by integrating an iron-air redox battery into the CSP-CaL system 通过将铁-空气氧化还原电池集成到CSP-CaL系统中实现混合电能和热能存储

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-28 DOI: 10.1016/j.enconman.2025.119997

Zhihui Wang , Binjian Nie , Nan He , Qicheng Chen , Yingjin Zhang , Liang Yao

{"title":"Realizing hybrid electrical and thermal energy storage by integrating an iron-air redox battery into the CSP-CaL system","authors":"Zhihui Wang , Binjian Nie , Nan He , Qicheng Chen , Yingjin Zhang , Liang Yao","doi":"10.1016/j.enconman.2025.119997","DOIUrl":"10.1016/j.enconman.2025.119997","url":null,"abstract":"<div><div>The development of renewable energy through energy storage technologies has addressed the issue of energy fluctuations. However, the insufficient absorption capacity of the grid leads to significant power curtailment. In this work, a solid oxide iron-air redox battery (SOIARB) is integrated into the concentrated solar power (CSP) with calcium looping (CaL) system to achieve hybrid electrical and thermal energy storage. Among three integration scenarios, scenario-1 (CaCO<sub>3</sub> stream heats Fe stream) exhibits the highest round-trip efficiency (RTE). As the current density escalates from 100 A/m<sup>2</sup> to 2000 A/m<sup>2</sup>, the energy efficiency of the battery decreases from 91.99 % to 53.60 %. Energy analysis shows that the CSP-CaL-SOIARB system performs best when the iron flow is 15.01 kg/s and the cross-sectional area is 74554.44 m<sup>2</sup>. RTE of the overall system and SOIARB subsystem reach 48.77 % and 61.01 %, respectively. The integration of iron-air batteries has improved the power supply capacity of the overall system by 31.37 MW, an increase of 72.55 %. Exergy analysis shows that the exergy efficiency of the overall system reaches 50.04 %, which exhibits considerable potential in hybrid electrical and thermal energy storage.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119997"},"PeriodicalIF":9.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploration of co-gasification mechanism of sewage sludge and bituminous coal based on reactive force field molecular dynamics simulation 基于反作用力场分子动力学模拟的污泥与烟煤共气化机理探讨

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-27 DOI: 10.1016/j.enconman.2025.119989

Jian Gao , Weiwei Xuan , Erzhou Zhang , Yaqiong Wang , Jiansheng Zhang , Qi Wang

{"title":"Exploration of co-gasification mechanism of sewage sludge and bituminous coal based on reactive force field molecular dynamics simulation","authors":"Jian Gao , Weiwei Xuan , Erzhou Zhang , Yaqiong Wang , Jiansheng Zhang , Qi Wang","doi":"10.1016/j.enconman.2025.119989","DOIUrl":"10.1016/j.enconman.2025.119989","url":null,"abstract":"<div><div>The co-gasification of sewage sludge and coal not only facilitates industrial decarbonization but also provides a promising approach for sludge treatment. In this study, the mechanisms of sewage sludge and bituminous coal were explored by the molecular dynamic simulation and the reactive force field. Synergy analysis revealed that the co-gasification process enhanced the production of H<sub>2</sub> and CO by 2.1 % and 1.75 % respectively. The visualization results demonstrate that glyceryl triacetate, leucine, β-D-glucose and coal molecules decompose sequentially to produce fragments during the pyrolysis stage. In the initial gasification stage, a large number of OH radicals participate in the reactions, attacking the fragments into small-molecule highly reactive groups. While H radical is more readily react with the small reactive groups to generate gaseous products. Additionally, molecular cleavage is induced by high temperature and the interaction between OH radicals and molecular fragments is accelerated. More OH and H radicals are generated by using steam, further modulating the H<sub>2</sub>/CO ratio. This study offers valuable molecular insights for optimizing the co-gasification process of sludge and coal and decarbonization goals.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119989"},"PeriodicalIF":9.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analyze the mechanism of separating resin and glass fiber from the main beam material of retired wind turbine blades during the process of vacuum melting-gasification-decomposition-condensation 分析了退役风电叶片真空熔融-气化-分解-冷凝过程中树脂和玻璃纤维从主梁材料中分离的机理

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-27 DOI: 10.1016/j.enconman.2025.119996

Keyi Lin, Chunmu Wang, Man Zhao, Jujun Ruan

{"title":"Analyze the mechanism of separating resin and glass fiber from the main beam material of retired wind turbine blades during the process of vacuum melting-gasification-decomposition-condensation","authors":"Keyi Lin, Chunmu Wang, Man Zhao, Jujun Ruan","doi":"10.1016/j.enconman.2025.119996","DOIUrl":"10.1016/j.enconman.2025.119996","url":null,"abstract":"<div><div>The resource utilization of retired wind turbine blades is a key part of achieving the “dual carbon” goal. It is difficult to separate the adhesion between glass fiber and thermosetting resin in the main beam material of retired wind turbine blades, and the presence of thermosetting resin affects the recycling of glass fiber. The current separation technology has problems such as high technical difficulty and low availability of recycled products. In this study, it was verified that the vacuum melting-gasification-decomposition-condensation method could effectively separate glass fiber and thermosetting resin, and the thermosetting resin condensed in the pipe. The average heat release rate during decomposition is 48.26 kW/m<sup>2</sup>, and the heat treatment process is easy to control. The reaction sites were calculated and simulated by quantum chemistry, and the bond breaking energies of the thermosetting resin were 378.98 kJ/mol, 393.92 kJ/mol and 352.67 kJ/mol, respectively. The simulation results combined with the thermal decomposition characteristics show that the separation process goes through four parts: vacuum melting, gasification, decomposition and condensation. In addition, the material has a Young’s modulus of 33946.76 MPa, and has strong toughness and potential for recycling. This paper may be the first study to recycle glass fibers using vacuum melting-gasification-decomposition-condensation technology.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119996"},"PeriodicalIF":9.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave-assisted catalytic pyrolysis of polypropylene for aviation fuel production with Fe/Ni catalysts: A comparison with electrical catalytic pyrolysis 微波辅助Fe/Ni催化剂催化热解聚丙烯航空燃料：与电催化热解的比较

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-27 DOI: 10.1016/j.enconman.2025.119993

Wenming Fu , Yaning Zhang , Zhihong Liu , Wenke Zhao , Wei Liu , Yong Shuai

{"title":"Microwave-assisted catalytic pyrolysis of polypropylene for aviation fuel production with Fe/Ni catalysts: A comparison with electrical catalytic pyrolysis","authors":"Wenming Fu , Yaning Zhang , Zhihong Liu , Wenke Zhao , Wei Liu , Yong Shuai","doi":"10.1016/j.enconman.2025.119993","DOIUrl":"10.1016/j.enconman.2025.119993","url":null,"abstract":"<div><div>To enhance aviation fuel production from plastic waste and understand the impact of microwave heating on pyrolysis, this study investigated the microwave-assisted catalytic pyrolysis of polypropylene (PP) using Fe/Ni-loaded HY zeolite catalysts (HY-zeolite, Fe/HY, Ni/HY, and FeNi/HY). Gas chromatography-mass spectrometry was employed to analyze the composition of the pyrolysis oil, while the gas composition was determined using a mass spectrometer. The catalytic performances of HY-zeolite, Fe/HY, Ni/HY, and FeNi/HY were assessed, with a catalytic-free experiment serving as a reference. Among these catalysts, FeNi/HY showed the best performance, producing pyrolysis oil rich in naphthenes (23.02 area%), paraffins (34.67 area%), and monocyclic aromatics (31.19 area%), which were favorable for aviation fuel production. The effects of pyrolysis temperature (400, 450, 500, 550, and 600 °C) and microwave power (400, 500, 600, 700, and 800 W) were systematically examined, revealing that 500 °C and 500 W provided the best conditions for both maximum oil yield (67.5 wt%) and superior oil quality. Finally, a comparative study of PP pyrolysis using the same catalysts under electrical and microwave-assisted heating was conducted to determine the specific effects of microwave heating. The results showed that the formation of localized hotspots generated high-temperature microenvironments, which facilitated the cleavage of chemical bonds and the formation of free radicals. Moreover, the combined effect of FeNi/HY and microwave heating significantly increased naphthene production, improving the quality of the resulting aviation fuel.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119993"},"PeriodicalIF":9.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary experimental verification of conduction-cooled superconducting DC cables in space operation 传导冷却超导直流电缆在空间运行中的初步实验验证

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-27 DOI: 10.1016/j.enconman.2025.119994

Yong Yang , Kun Su , Qian Gong , Xiaohang Li , Jingwang Han , Yujia Zhu , Yunyi Wu

{"title":"Preliminary experimental verification of conduction-cooled superconducting DC cables in space operation","authors":"Yong Yang , Kun Su , Qian Gong , Xiaohang Li , Jingwang Han , Yujia Zhu , Yunyi Wu","doi":"10.1016/j.enconman.2025.119994","DOIUrl":"10.1016/j.enconman.2025.119994","url":null,"abstract":"<div><div>The conduction-cooled superconducting power cable is regarded as a reliable approach for power transmission in future unmanned space environments. This method employs a cryogenic refrigerator for heat conduction cooling and does not require the regular provision of additional coolant to ensure long-term efficient and stable operation of space power systems. Unfortunately, this device has yet to be validated for operation under relevant usage conditions. This paper establishes an implementation scheme and research findings for a conduction-cooled high-temperature superconducting cable system designed for a vacuum environment. The system comprises two cryocoolers and a conduction-cooled high-temperature superconducting (HTS) DC cable enclosed within a vacuum chamber. It performs functions such as charging tests, temperature and critical current data acquisition, and thermal monitoring. The thermal characteristics of the cable during precooling and current-carrying operations are systematically measured and analysed, and the current-carrying capacity of the cable is comprehensively evaluated. Additionally, the response characteristics of the refrigerator under varying current conditions are elucidated. These experimental results affirm the potential of conduction-cooled superconducting cables for stable operation in space power transmission.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119994"},"PeriodicalIF":9.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of CO2 and water soluble sodium-based catalysts in the aquathermolysis of heavy oil CO2和水溶性钠基催化剂在重油水热裂解中的作用机理

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-27 DOI: 10.1016/j.enconman.2025.119981

Yasser I.I. Abdelsalam, Lilia Kh. Galiakhmetova, Vladimir E. Katnov, Irek I. Mukhamatdinov, Rustam R. Davletshin, Alexey V. Vakhin

{"title":"Mechanisms of CO2 and water soluble sodium-based catalysts in the aquathermolysis of heavy oil","authors":"Yasser I.I. Abdelsalam, Lilia Kh. Galiakhmetova, Vladimir E. Katnov, Irek I. Mukhamatdinov, Rustam R. Davletshin, Alexey V. Vakhin","doi":"10.1016/j.enconman.2025.119981","DOIUrl":"10.1016/j.enconman.2025.119981","url":null,"abstract":"<div><div>The application of carbon dioxide (CO<sub>2</sub>) for heavy oil extraction presents a promising alternative, particularly in scenarios where conventional techniques prove economically unviable. This study analyzes the effects of non-catalytic thermolysis at various initial CO<sub>2</sub> pressures, both with and without water (H<sub>2</sub>O), aiming to identify optimal conditions for reducing the viscosity of heavy oil. These conditions are subsequently applied within the framework of catalytic aquathermolysis with a water-soluble catalyst at a temperature of 300 °C for 24 h. The obtained results demonstrate that increasing the initial CO<sub>2</sub> pressure leads to improved solubility and swelling of conversion products, which, in turn, contributes to the reduction of viscosity. During catalytic thermolysis with water-soluble catalysts based on Na<sub>3</sub>VO<sub>4</sub>, NaH<sub>2</sub>PO<sub>4</sub>, and Na<sub>2</sub>H<sub>5</sub>P(W<sub>2</sub>O<sub>7</sub>)<sub>6</sub> in a CO<sub>2</sub> atmosphere, a high level of efficiency was recorded for the Na<sub>3</sub>VO<sub>4</sub> catalyst under optimal conditions, resulting in a 35.5 % reduction in asphaltene content, as well as a 72.8 % reduction in viscosity at 20 °C and a 41.2 % decrease in sulfur content compared to heavy oil. Moreover, the inclusion of tetralin in the process as a hydrogen donor significantly enhanced the reduction of viscosity and increased the yield of light fractions such as gasoline and diesel fuel. The results of the work emphasize the high promise of combining CO<sub>2</sub> with water-soluble catalysts in catalytic aquathermolysis for reducing the viscosity of heavy oil. This opens new opportunities for improving processing efficiency and could significantly impact the future of the oil industry.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119981"},"PeriodicalIF":9.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collaborative management for decarbonizing canada’s multi-regional electric power systems by 2050: A factorial non-deterministic multi-stage bi-level programming model 到2050年加拿大多区域电力系统脱碳的协同管理：一个因子非确定性多阶段双层规划模型

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-26 DOI: 10.1016/j.enconman.2025.119975

Lijun Lin, Guohe Huang, Bin Luo, Yanyan Liu, Nan Wang

{"title":"Collaborative management for decarbonizing canada’s multi-regional electric power systems by 2050: A factorial non-deterministic multi-stage bi-level programming model","authors":"Lijun Lin, Guohe Huang, Bin Luo, Yanyan Liu, Nan Wang","doi":"10.1016/j.enconman.2025.119975","DOIUrl":"10.1016/j.enconman.2025.119975","url":null,"abstract":"<div><div>Multi-regional electric power systems (MEPS) management involves hierarchical decision-making, multi-dimensional uncertainties, and inter-regional interactions. Conventional deterministic single-level MEPS models struggle to balance trade-offs across multiple objectives and/or criteria at different decision levels and manage uncertainties. To support the low-carbon transition of Canadian MEPS (2031–2050), a factorial non-deterministic multi-stage bi-level programming model (FNDMSBP) is developed, with dual objectives of minimizing GHG emissions at the upper level and system costs at the lower level. By 2050, approximately 80 % of Canada’s electricity will come from non-fossil fuels, with new capacity driven by wind, carbon capture and storage (CCS), and small modular reactor technologies tailored to varying electricity demands. Average annual GHG emissions will decrease to [22.95, 24.87] Mt CO<sub>2</sub>eq., cutting emissions by over half from 2020 levels. Emission intensity will drop from [0.071, 0.075] to 0.013 kg/kWh, with clean power utilization rising from 0.014 to [0.024, 0.025] MWh/C$. Natural gas and uranium remain essential fuels, contributing over 87 % of energy consumption and 20 % of system costs, with sensitivity analysis highlighting natural gas prices’ significant effects on costs and emissions. Compared to single-level models, FNDMSBP demonstrates its superiority in balancing environmental and economic goals, achieving a GHG reduction of [45.06, 46.87]% with a modest cost increase of [3.56, 3.60]%. This is achieved by prioritizing emission mitigation in high-emission regions such as Alberta and Saskatchewan, while advancing natural gas-CCS and wind energy. This study will help decision-makers analyze interactions and tradeoffs between environmental and economic development under uncertainty, supporting collaborative and sustainable MEPS management.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"339 ","pages":"Article 119975"},"PeriodicalIF":9.9,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on thermal management of cylindrical lithium-ion batteries based on interwound cooling belt structure 基于绕线冷却带结构的圆柱形锂离子电池热管理研究

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-26 DOI: 10.1016/j.enconman.2025.119962

Wenjie Qi , Jiaxing Yang , Zhigang Zhang , Jieyang Wu , Peng Lan , Shuangling Xiang

{"title":"Investigation on thermal management of cylindrical lithium-ion batteries based on interwound cooling belt structure","authors":"Wenjie Qi , Jiaxing Yang , Zhigang Zhang , Jieyang Wu , Peng Lan , Shuangling Xiang","doi":"10.1016/j.enconman.2025.119962","DOIUrl":"10.1016/j.enconman.2025.119962","url":null,"abstract":"<div><div>Battery thermal management is a major challenge for battery electric vehicles, with thermal runaway incidents sparking public safety concerns. Aiming to tackle the issues of excessive module temperature and inadequate thermal balance of vehicle power batteries under high discharge rates, a novel interwound cooling belt structure for cylindrical lithium-ion batteries based on the temperature distribution characteristics of battery modules is proposed. A comparative analysis of thermal–hydraulic performance across four cooling structures demonstrates that the proposed design exhibits superior efficacy in battery thermal management applications. The effect of cooling belt geometry on thermal management performance under fixed mass flow rates is systematically investigated. Thermal-hydraulic analysis demonstrates that a bifurcated cooling belt design with 24 mm (main) and 16 mm (branch) heights maximizes heat dissipation efficiency. Orthogonal test design is adopted to evaluate the influence of cooling channel geometry (heights), inlet coolant temperature, and mass flow rate on the thermal performance of the interwound cooling belt structure. Optimal configurations are determined through a balanced multi-parameter optimization approach. The optimized configuration exhibits superior thermal–hydraulic performance relative to the baseline, with maximum temperature (<em>T</em><sub>max</sub>) being 6.31 K lower, maximum temperature difference (Δ<em>T</em><sub>max</sub>) reduced by 0.18 K, and the pressure drop (Δ<em>P</em>) cut by 39.02 %.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119962"},"PeriodicalIF":9.9,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced coupling of low-grade heat sources with Carnot battery through optimal temperature matching 通过优化温度匹配，增强了低品位热源与卡诺电池的耦合

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-24 DOI: 10.1016/j.enconman.2025.119953

Xianliang Yang , Fangning Xu , Enhui Sun , Qinchai Chen , Jinliang Xu

{"title":"Enhanced coupling of low-grade heat sources with Carnot battery through optimal temperature matching","authors":"Xianliang Yang , Fangning Xu , Enhui Sun , Qinchai Chen , Jinliang Xu","doi":"10.1016/j.enconman.2025.119953","DOIUrl":"10.1016/j.enconman.2025.119953","url":null,"abstract":"<div><div>The integration of an external waste heat source into the Carnot battery system holds the theoretical potential to surpass 100% in efficiency. However, achieving significant efficiency requires waste heat sources with relatively high temperatures, limiting the application of Carnot batteries. To address challenge, this paper proposes a novel Carnot battery based on non-phase-change waste heat sources from the perspective of heat transfer temperature matching among waste heat sources, heat pumps, and Organic Rankine Cycles (ORC). The proposal is developed through theoretical modeling and comprehensive energy/exergy analysis, emphasizing the optimization of thermal coupling relationships to enhance system efficiency. On the charging side, Vapor Compression Heat Pump (VCHP) with a small temperature difference for heat absorption is selected to align with the variable temperature characteristics of the waste heat source. To address the narrow temperature range of the VCHP, this study proposes the integration of a Supercritical Extraction Steam Compression Regeneration ORC (SRORC). This cycle markedly elevates the evaporator’s inlet temperature through the compression regeneration process, enabling narrow temperature range heat absorption on the cycle side and enhancing heat exchange matching with the heat storage process. The new system excels in achieving superior temperature matching across each process. Notably, at a waste heat source temperature of 86.4 °C, the power-to-power efficiency of the Carnot battery reaches an optimal 100%, significantly reducing the required heat source temperature. Exergy analysis reveals that the exergy loss in the evaporator on the power generation side is substantially diminished, with the new system’s exergy efficiency reaching 43.41%, surpassing that of a conventional Carnot battery by 13.40%.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"339 ","pages":"Article 119953"},"PeriodicalIF":9.9,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A deconstruction and quantification strategy for the reversible efficiency of solid oxide cell systems in an entire cycle 固体氧化物电池系统在整个循环中可逆效率的解构和量化策略

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-24 DOI: 10.1016/j.enconman.2025.119914

Guoqiang Liu , Zhen Wang , Jakub Kupecki , Yihuan Zhou , Jingxuan Peng , Yulong Ji , Xi Li

{"title":"A deconstruction and quantification strategy for the reversible efficiency of solid oxide cell systems in an entire cycle","authors":"Guoqiang Liu , Zhen Wang , Jakub Kupecki , Yihuan Zhou , Jingxuan Peng , Yulong Ji , Xi Li","doi":"10.1016/j.enconman.2025.119914","DOIUrl":"10.1016/j.enconman.2025.119914","url":null,"abstract":"<div><div>High-temperature solid oxide cell (SOC) technology is a promising solution for peak shaving and valley filling in intermittent renewable energy microgrids due to its high efficiency and reversibility. Energy conversion is typically done in units of one charge/discharge cycle; however, a precise definition of the SOC system efficiency in continuous switching cycles has not yet been found, particularly lacking unrestricted quantification of reversible efficiency and mode scheduling optimization. This paper proposes, for the first time, the concept of generalized reversible efficiency (GRT) for SOC systems, along with a novel deconstruction and quantification strategy to solve the optimal GRT of such systems over an entire cycle. Specifically, the switching efficiency analysis is based on an energy-flow model of the reversible SOC system, which incorporates a secondary heat recovery process. An algorithmic strategy consisting of an improved decomposition-based multi-objective differential evolution algorithm is designed to optimize GRT under multiple constraints. Results indicate that GRT can be converted into cycle P2G2P (Power to Gas to Power) in any direction. The global maximum GRT is around 60.4%, occurring at the lower point of the medium capacity (denoted as <span><math><mi>γ</mi></math></span>, <span><math><mi>γ</mi></math></span>≈ 160). The optimal GRT decreases with increasing <span><math><mi>γ</mi></math></span>, exhibits a trade-off with the discharge efficiency,and is affected by thermal dissipation and internal energy losses, especially during discharge.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"340 ","pages":"Article 119914"},"PeriodicalIF":9.9,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0