Energy Conversion and Management最新文献

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Techno-economic evaluation of solar-driven direct air capture under various configurations 不同配置下太阳能直接空气捕获的技术经济评价
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-23 DOI: 10.1016/j.enconman.2025.120233
Farzin Hosseinifard , Mohsen Salimi , Majid Amidpour
{"title":"Techno-economic evaluation of solar-driven direct air capture under various configurations","authors":"Farzin Hosseinifard ,&nbsp;Mohsen Salimi ,&nbsp;Majid Amidpour","doi":"10.1016/j.enconman.2025.120233","DOIUrl":"10.1016/j.enconman.2025.120233","url":null,"abstract":"<div><div>The growing concentration of atmospheric carbon dioxide has intensified climate change concerns, prompting the need for scalable and sustainable carbon removal technologies. Direct air capture (DAC) is a promising solution, yet it is hindered by high energy demands and fossil fuel dependency. This study presents a comprehensive techno-economic and exergoeconomic analysis of solar-integrated DAC systems to assess their performance under four different configurations: DAC powered by photovoltaic (PV) panels alone, DAC with PV and parabolic trough collectors (PTC), DAC with PV and a single solar tower, and DAC with PV and a modular solar tower. The DAC process is simulated in Aspen Plus V11 using a hydroxide-carbonate absorption cycle. Among the evaluated scenarios, the DAC + PV + Single Tower system achieves the lowest levelized cost of DAC (LCOD) at 276.21 $/ton, representing a 6.7 % cost reduction compared to the PV-only configuration. Furthermore, this scenario demonstrates the highest exergoeconomic factor (19.53 %), highlighting superior cost-effectiveness and thermodynamic performance. While the PV + PTC configuration exhibits the highest exergy efficiency (6.77 %), its cost savings are marginal compared to tower-based systems. These findings underscore the potential of solar-assisted DAC systems, particularly tower-integrated configurations, as a viable and economically attractive solution for large-scale atmospheric carbon dioxide removal.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120233"},"PeriodicalIF":9.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686904","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
Computer-aided molecular design of diffusion–absorption refrigeration modules for low-temperature solar collectors 低温太阳能集热器扩散-吸收制冷模块的计算机辅助分子设计
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-23 DOI: 10.1016/j.enconman.2025.120067
Asmaa A. Harraz , Andrew J. Haslam , Niall Mac Dowell , Christos N. Markides
{"title":"Computer-aided molecular design of diffusion–absorption refrigeration modules for low-temperature solar collectors","authors":"Asmaa A. Harraz ,&nbsp;Andrew J. Haslam ,&nbsp;Niall Mac Dowell ,&nbsp;Christos N. Markides","doi":"10.1016/j.enconman.2025.120067","DOIUrl":"10.1016/j.enconman.2025.120067","url":null,"abstract":"<div><div>Diffusion absorption refrigeration (DAR) is an attractive thermally-driven cooling technology that can be powered using renewable heat, <em>e.g.</em>, from solar-thermal collectors. This technology can address refrigeration security challenges, rising electricity costs, as well as energy, resource-use and emissions concerns. Commercial DAR modules typically use NH<sub>3</sub>—H<sub>2</sub>O as the working fluid pair, which requires temperatures above 150<!--> <!-->°C to be supplied to initiate cooling. Due to their lower saturation temperatures, organic working fluids can be attractive substitutes in enabling DAR modules to be used in conjunction with low-cost, non- or low-concentrating solar-thermal collectors (50<!--> <!-->°C to 150<!--> <!-->°C). In this paper, an integrated computer-aided molecular and DAR (CAMD-DAR) system design framework is proposed that uses a group-contribution equation-of-state based on the statistical associating fluid theory (SAFT-γ Mie) for working-fluid design and property prediction simultaneously with the DAR module design. Following a detailed presentation of this CAMD-DAR system framework, the framework is employed to identify optimal organic working fluids and DAR-system designs simultaneously for a specified solar-cooling application. The results suggest that non-polar organic refrigerants with polar absorbents are to be selected if maximum cooling rates are required from an otherwise conventional DAR module design. In particular, a mixture of 2-butene (2-C<sub>4</sub>H<sub>8</sub>) and ethanol (C<sub>2</sub>H<sub>5</sub>OH) pressurised by He is identified as the optimum working fluid for a wide range of cooling and ambient temperatures. The use of this fluid can produce maximum cooling rates up to 146<!--> <!-->W from 440 W of heat supplied to the generator at 82<!--> <!-->°C, corresponding to a specific purchase cost (<span><math><mrow><mi>S</mi><mi>P</mi><mi>C</mi></mrow></math></span>) of £ 7.46 per W of cooling, and a coefficient of performance (COP) of 0.33 at a cooling temperature of 4<!--> <!-->°C and an ambient of 20<!--> <!-->°C. Overall, the proposed CAMD-DAR framework is capable of suggesting alternative organic working fluid mixtures that compete with the standard <span><math><msub><mrow><mi>NH</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>—<span><math><mrow><msub><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>O</mi></mrow></math></span> pair, thanks to the lower generator temperatures (<span><math><mo>&lt;</mo></math></span> 150<!--> <!-->°C) required by these fluids to activate the DAR modules, which is especially advantageous in solar-cooling applications, when non- or low-concentrating collectors are to be used.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120067"},"PeriodicalIF":9.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686905","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 grey-box approach for constructing generic industrial thermal profiles 构建通用工业热剖面的灰盒法
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120246
Alireza Mahmoudan , Benjamin H.Y. Ong , Navdeep Bhadbhade , Donald G. Olsen , Beat Wellig , Martin K. Patel
{"title":"A grey-box approach for constructing generic industrial thermal profiles","authors":"Alireza Mahmoudan ,&nbsp;Benjamin H.Y. Ong ,&nbsp;Navdeep Bhadbhade ,&nbsp;Donald G. Olsen ,&nbsp;Beat Wellig ,&nbsp;Martin K. Patel","doi":"10.1016/j.enconman.2025.120246","DOIUrl":"10.1016/j.enconman.2025.120246","url":null,"abstract":"<div><div>Industrial heat demand accounts for a significant share of global energy consumption and associated emissions, highlighting the urgent need for effective decarbonization strategies. This study presents a data-driven methodology for constructing generic thermal profiles that characterize hot utility requirements across industrial processes. Using an optimized weighted K-means algorithm, 79 Composite Curves are clustered into four distinct groups, each representing a unique heat demand pattern. For each cluster, a representative Composite Curve is derived through conventional pinch analysis and subsequently transformed into a Grand Composite Curve, illustrating net heat demand across temperature levels after maximizing internal heat recovery. These generic thermal profiles cover a broad temperature spectrum and offer valuable guidance for selecting hot utility technologies, informing regional energy planning, and supporting industrial decarbonization initiatives.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120246"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679285","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 hybrid source direct expansion air conditioning system with three-fluid heat exchangers for energy and water conservation 一种节能节水的三流体热交换器混合源直接膨胀空调系统
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120254
Fuhai Zha , Yuan Wang , Hongsen Wang , Wentao Wang , Xianting Li , Wenxing Shi , Defang Guo , Shoubo Mao
{"title":"A hybrid source direct expansion air conditioning system with three-fluid heat exchangers for energy and water conservation","authors":"Fuhai Zha ,&nbsp;Yuan Wang ,&nbsp;Hongsen Wang ,&nbsp;Wentao Wang ,&nbsp;Xianting Li ,&nbsp;Wenxing Shi ,&nbsp;Defang Guo ,&nbsp;Shoubo Mao","doi":"10.1016/j.enconman.2025.120254","DOIUrl":"10.1016/j.enconman.2025.120254","url":null,"abstract":"<div><div>To achieve the energy and water conservation in buildings, a hybrid source direct expansion air conditioner with three-fluid heat exchangers in indoor and outdoor units is developed in this paper. The water channels of all three-fluid heat exchangers connect to a cooling tower, enabling outdoor units to switch between air and water sources, and indoor units to switch between direct-expansion cooling and free-cooling. The effectiveness − Number of Transfer Units, efficiency-frequency correction, Merkel, and manufacturer-fitted models are used to calculate the performance of heat exchangers, compressors, cooling towers, and fans/pumps/air source heat pumps, respectively. Based on the component models, the simulation model of the proposed system is established. An office building in Nanjing is selected as the case study, and the energy performance and water consumption of the proposed system under both energy conservation and water conservation strategies are simulated and compared with the air source system and the water source system. The results demonstrate that: (1) Compared with two reference systems, the proposed system improves annual energy efficiency by about 22 % in energy conservation strategy, and 16 % in water conservation strategy. (2) Compared to water source system, the proposed system reduces seasonal water consumption by 49 % with same seasonal energy efficiency. (3) The static payback period of the proposed system is less than 4 years compared to the air source system. The proposed system has both lower initial cost and higher energy efficiency than the water-source system.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120254"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679288","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
Comprehensive investigation on dynamic energy performances of pipe-embedded enclosure structures with thermal anisotropic injection and diffusion features 具有热各向异性注入和扩散特征的管嵌式围护结构动态能量性能综合研究
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120261
Yang Yang , Sarula Chen
{"title":"Comprehensive investigation on dynamic energy performances of pipe-embedded enclosure structures with thermal anisotropic injection and diffusion features","authors":"Yang Yang ,&nbsp;Sarula Chen","doi":"10.1016/j.enconman.2025.120261","DOIUrl":"10.1016/j.enconman.2025.120261","url":null,"abstract":"<div><div>Enhancing performances of the hydronic thermal barriers created by pipe-embedded systems has increasingly been recognized as an effective way to minimize high-grade energy consumption in building operations. However, the thermal energy charging design employed in conventional pipe-embedded energy walls (C-PEWs) makes it challenging to resolve the discrepancy between heat injection and diffusion capacity. This study presents a unique design for enhancing performances of C-PEWs through thermally anisotropic diffusion composite structures, i.e., TAD-PEWs. A detailed numerical study was performed to analyze how various design parameters and operating conditions influence performances of TAD-PEWs. Results indicated that the thermally anisotropic diffusion composite layer design could decrease heat loss at the inner surface by 31.75%-280.81%, and increase injected heat by 26.78%-172.19%. Besides, the heat diffusion capacity of the functional layer significantly affected the diffusion rate of injected heat in the vertical direction, and the performance of TAD-PEWs gradually approached the ideal level when thermal conductivity of the functional layer exceeded 8–12 times that of concrete. Moreover, the inner panel’s thermal conductivity had a greater impact than the outer panel, and its impact pattern also varied depending on the operating mode. Specifically, increasing the outer panel’s thermal conductivity benefited all working modes, while enhancing the inner panel’s thermal conductivity was advantageous in scenarios dominated by auxiliary-heating mode and counterproductive in scenarios dominated by load-reduction mode. For optimal performance, the functional layer was suggested to be placed near the outdoor side in scenarios dominated by load-reduction mode, and near the indoor side in scenarios dominated by auxiliary-heating mode and load-neutral mode. Finally, the technical stability of thermally anisotropic diffusion composite layer designs was not affected by climate factors, and the performance of TAD-PEWs under different climatic conditions was significantly better than that of C-PEWs. The thermal barrier perfection degree of TAD-PEWs all exceeded 0.9, with growth ranging from 31.99% to 199.08% under the same conditions.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120261"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679287","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
Quantifying ecosystem service spillover effects for sustainable development in the Yangtze River basin using emergy theory 基于能值理论的长江流域可持续发展生态系统服务溢出效应量化研究
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120230
Yingjun Xu , Xinjian Guan , Yu Meng , Nan Wang , Yacun Yang , Weiwei Yao
{"title":"Quantifying ecosystem service spillover effects for sustainable development in the Yangtze River basin using emergy theory","authors":"Yingjun Xu ,&nbsp;Xinjian Guan ,&nbsp;Yu Meng ,&nbsp;Nan Wang ,&nbsp;Yacun Yang ,&nbsp;Weiwei Yao","doi":"10.1016/j.enconman.2025.120230","DOIUrl":"10.1016/j.enconman.2025.120230","url":null,"abstract":"<div><div>The Yangtze River Basin, China’s most vital river system, faces increasing ecological and resource pressures. By integrating emergy theory with spatial autocorrelation and the breakpoint theory within a coupling field intensity model, this study establishes a framework to quantify cross-regional ecosystem service spillovers across forest, grassland, and water eco-subsystems. The results reveal that from 2000 to 2020, the emergy of natural ecosystem services exhibited an initial decline, followed by an increase and then a slight regression, primarily influenced by the water eco-subsystem. Forests were the dominant contributor with a rising trend, while grasslands exhibited periodic fluctuations influenced by urbanization but demonstrated positive development potential when aligned with urban planning. The results also indicate that ecosystem service spillovers showed a rising trend with basin-wide distribution. Forests exhibited the highest spillover levels, with high-quality ecological areas concentrated in the southwest, while grasslands in the northwest showed notable growth. Water eco-subsystem services, mainly clustered in the northeast, reached their lowest spillover level in 2020 due to the spatial dispersion of water storage services, reflecting an improved spatial distribution of water resources over time. These findings provide valuable insights for enhancing the Yangtze River Basin’s ecological resilience, promoting ecosystem preservation, and supporting sustainable development.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120230"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679284","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
Study on the reaction characteristics and kinetics of reducing iron ore pellet by utilization of ammonia 利用氨还原铁矿球团的反应特性及动力学研究
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120235
Yuejun Liu, Xianchun Li, Shaoyan Wang, Li Li
{"title":"Study on the reaction characteristics and kinetics of reducing iron ore pellet by utilization of ammonia","authors":"Yuejun Liu,&nbsp;Xianchun Li,&nbsp;Shaoyan Wang,&nbsp;Li Li","doi":"10.1016/j.enconman.2025.120235","DOIUrl":"10.1016/j.enconman.2025.120235","url":null,"abstract":"<div><div>Ammonia (NH<sub>3</sub>) is a carbon-free energy source with high application prospects as a reducing agent in direct reduction ironmaking processes. In this study, the effects of temperature, gas concentration, and total gas flow rate on iron ore pellets directly reduced by NH<sub>3</sub> were investigated using high-temperature thermogravimetric equipment. The kinetics of 60 % NH<sub>3</sub> reduced iron ore pellets were studied in the temperature range of 800 °C-950 °C. Increasing the total gas flow rate and NH<sub>3</sub> concentration will enhance the endothermic of the reaction. When the NH<sub>3</sub> concentration is between 30 % and 90 %, the reduction degree can reach 0.9 or above. The metallization rate of the product obtained by 60 % NH<sub>3</sub> reduction ranges from 97.54 % to 98.81 % within the temperature range of 850 ℃–950 ℃. The model-fitting results reveal that the iron ore pellets reduction by 60 % NH<sub>3</sub> follows the geometrical contraction and diffusion models, with an apparent activation energy of 65.94 kJ/mol. The model-free method indicates that the apparent activation energy of NH<sub>3</sub>-reduced iron ore pellets has two peaks in the reduction. The formation of nitric oxide (NO) and hydrogen (H<sub>2</sub>) indicates that both NH<sub>3</sub> and H<sub>2</sub> decomposed from NH<sub>3</sub> are involved in the reduction of iron ore pellets. This study provides theoretical support for a deeper understanding of the characteristics of NH<sub>3</sub> metallurgy.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120235"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679289","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
Performance and wake characteristics of a tidal turbine operating at different tip speed ratios in elevated free-stream turbulence 自由湍流中不同叶尖速比的潮汐水轮机性能与尾迹特性
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120214
Cong Han, Arindam Banerjee
{"title":"Performance and wake characteristics of a tidal turbine operating at different tip speed ratios in elevated free-stream turbulence","authors":"Cong Han,&nbsp;Arindam Banerjee","doi":"10.1016/j.enconman.2025.120214","DOIUrl":"10.1016/j.enconman.2025.120214","url":null,"abstract":"<div><div>Tidal turbines operate in open-water environments that have an elevated level of free-stream turbulence, leading to dynamic inflow conditions that do not coincide with a rated or design operating condition. A detailed experimental campaign was thus conducted using a 1:20 scale turbine that was subjected to varying levels of elevated turbulence for three pre-selected tip speed ratios that mimic different operating scenarios; a comparatively low TSR (&lt;3), an optimum TSR (4.5–5.0), and a large TSR (&gt;6). Turbine performance and near-wake characteristics (including recovery) were measured and compared with the turbine operating in a quasi-laminar inflow, i.e., without background inflow turbulence. The experimental results reveal that TSR has a significant effect on the wake. Increasing TSR results in more significant wake deficits, more intensive momentum exchange in the near-wake region, and faster wake recovery due to strong wake mixing with the bypass flow. Early breakdown of tip vortices in the wake were also observed at the largest tested TSR.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120214"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686893","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
Synergistic integration of solid-state hydrogen storage with thermal and electrical energy storage: Multi-energy collaborative optimization 固态储氢与热能和电能存储的协同集成:多能协同优化
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120228
Changyi Xie , Yuanyuan Wang , Xiaokun Gu
{"title":"Synergistic integration of solid-state hydrogen storage with thermal and electrical energy storage: Multi-energy collaborative optimization","authors":"Changyi Xie ,&nbsp;Yuanyuan Wang ,&nbsp;Xiaokun Gu","doi":"10.1016/j.enconman.2025.120228","DOIUrl":"10.1016/j.enconman.2025.120228","url":null,"abstract":"<div><div>Energy storage is essential for enhancing the utilization of intermittent renewable energy sources. Among available technologies, metal hydride-based hydrogen storage offers high safety, compactness, and suitability for long-duration applications. Yet its adoption is limited by significant thermal challenges, including heat release during hydrogen absorption and heat input required for desorption. This study proposes a hybrid energy storage-integrated energy system that combines metal hydride hydrogen storage with thermal and electrical energy storage to enhance multi-energy coordination. A key innovation is the integration of a phase change material (PCM) tank to capture heat from hydrogen absorption and fuel cell operation, which is reused for hydrogen desorption and heating. A two-phase collaborative optimization framework is developed, where the first phase determines the configuration of renewable and conversion units, and the second phase optimizes the sizing of energy storage subsystems. Applied to a near-zero energy community under six scenarios, results show that the fully integrated storage mode reduces carbon emissions by 59.9% and grid interaction by 38.6% compared to the mode without battery, and lowers the levelized cost of energy by 17.0% relative to the mode without thermal storage. This work introduces a thermally coordinated hydrogen storage strategy and a replicable optimization framework, providing new insights for designing low-carbon, hydrogen-integrated energy systems.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120228"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679283","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
Optimization of sorption thermal battery via breakthrough curve modeling and experimental validation 通过突破曲线建模和实验验证对吸附热电池进行优化
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-07-22 DOI: 10.1016/j.enconman.2025.120252
Dae Young Jung , Hyung Won Choi , Jinhee Jeong , Young Kim , Jinseong Kim , Jungkyu Choi , Yong Tae Kang
{"title":"Optimization of sorption thermal battery via breakthrough curve modeling and experimental validation","authors":"Dae Young Jung ,&nbsp;Hyung Won Choi ,&nbsp;Jinhee Jeong ,&nbsp;Young Kim ,&nbsp;Jinseong Kim ,&nbsp;Jungkyu Choi ,&nbsp;Yong Tae Kang","doi":"10.1016/j.enconman.2025.120252","DOIUrl":"10.1016/j.enconman.2025.120252","url":null,"abstract":"<div><div>This study provides guidelines for the optimal design and operating conditions of the sorption thermal battery (STB) reactor. While significant progress has been made in material-level optimization through the development of novel composite adsorbents, research on system-scale optimization remains limited. Consequently, understanding the effects of operating conditions on STB performance still largely relies on case-by-case experimental approaches, hindering the practical application of STB. To address this, a breakthrough curve model is used to predict STB performance—specifically, energy storage density (ESD) and operating time—under varying conditions and to identify optimal conditions. The model is validated through proof-of-concept STB reactor experiments. Comprehensive material characterization is also performed to identify the optimal working pair, enabling optimization from the material level to the reactor scale. The results confirm that 15 wt% LiOH-impregnated zeolite 13X is the optimal adsorbent, achieving an ESD of 2175 kJ kg<sub>ads</sub><sup>−1</sup>, surpassing other LiOH-based composite adsorbents reported in the literature. Operating conditions including vapor concentration, flow rate, and reactor length are integrated using the nondimensional adsorption distance coordinate <span><math><mrow><mi>ξ</mi></mrow></math></span>, enabling a generalized analysis of operating conditions. The optimal operating range is determined to be <span><math><mrow><mi>ξ</mi></mrow></math></span> = 0.105<span><math><mrow><mo>-</mo></mrow></math></span>0.118, achieving a maximum system-level ESD of 188.4 kWh m<sup>−3</sup>— representing a 38 % improvement compared to 136.3 kWh m<sup>−3</sup> at <span><math><mrow><mi>ξ</mi></mrow></math></span> = 0.038. Furthermore, experimental validation confirms that reactors operating at identical <span><math><mrow><mi>ξ</mi></mrow></math></span> values exhibit consistent breakthrough profiles and ESD, regardless of individual input parameters. These results have the potential to guide the optimal design of STB for low-grade heat utilization.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"343 ","pages":"Article 120252"},"PeriodicalIF":9.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679286","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
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