Energy Conversion and Management最新文献

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Performance evaluation of single stage flash desalination system under different air intermittences and intake valve opening conditions
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-26 DOI: 10.1016/j.enconman.2025.119658
Sarvjeet Singh , Rachit Garg , Prodyut R. Chakraborty , Hardik B. Kothadia
{"title":"Performance evaluation of single stage flash desalination system under different air intermittences and intake valve opening conditions","authors":"Sarvjeet Singh ,&nbsp;Rachit Garg ,&nbsp;Prodyut R. Chakraborty ,&nbsp;Hardik B. Kothadia","doi":"10.1016/j.enconman.2025.119658","DOIUrl":"10.1016/j.enconman.2025.119658","url":null,"abstract":"<div><div>Drinking water is produced inside the evaporator of thermal desalination plants through the critical processes of water vaporization and condensation. Any leakage in this unit can lead to substantial losses in thermal energy, reduced distillation efficiency, and potential contamination of the distillate product. Therefore, this study aims to introduce and investigate the thermal performance of single-stage flash desalination systems under different air intermittence and intake rates. An experimental system is fabricated, and experiments are performed with different operating conditions to simulate similar leakage conditions. The initial pressure inside the vacuum tank is set at 8.4 kPa, the water height is 60 mm, and the initial temperatures are 80 °C and 70 °C. The investigation explores the influence of different cycle lengths of air intake (<span><math><msub><mrow><mi>t</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>) and air removal periods (<span><math><msub><mrow><mi>t</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>), ranging from 6 s to 160 s for different intermittent periods. The study also explores different intake valve opening levels, including 0%, 25%, 50% and 100%, to understand how these different opening levels affect heat and mass transfer characteristics. The experiments examined and analysed the effect of different valve opening levels, air intake and removal periods, and initial liquid temperatures on measuring parameters such as temperature, pressure, water mass, and non-equilibrium factor (NEF). The results indicate that decreasing the air intake period and increasing the air removal period significantly improves the temperature and pressure drop. When the air removal period increases from 4 s to 6 s, the pool temperature drop increases from 18.6 °<span><math><mi>C</mi></math></span> to 23.2 °<span><math><mi>C</mi></math></span>. With the increase of initial temperature by 10 °<span><math><mi>C</mi></math></span>,the temperature drop and evaporated mass are increased by 22.4% and 21.7%. The outcomes provided a comprehensive understanding of the effects of leakage on the flashing evaporation process.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119658"},"PeriodicalIF":9.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488965","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
Optimal sizing of fuel cell hybrid electric Heavy-Duty tractor with minimum of unit mileage cost
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-26 DOI: 10.1016/j.enconman.2025.119674
Xiaoyu Wang, Shouwen Yao, Pengyu Li, Yuyang Chen, Qinghua Hao, Siqi Huang, Yinghua Zhao
{"title":"Optimal sizing of fuel cell hybrid electric Heavy-Duty tractor with minimum of unit mileage cost","authors":"Xiaoyu Wang,&nbsp;Shouwen Yao,&nbsp;Pengyu Li,&nbsp;Yuyang Chen,&nbsp;Qinghua Hao,&nbsp;Siqi Huang,&nbsp;Yinghua Zhao","doi":"10.1016/j.enconman.2025.119674","DOIUrl":"10.1016/j.enconman.2025.119674","url":null,"abstract":"<div><div>This paper proposes an optimal hybrid energy sources sizing methodology for fuel cell hybrid heavy-duty tractors (FCHHT) comprising fuel cell system (FCS) with battery (B) and supercapacitor (SC) as hybrid energy storage system (HESS). For this purpose, an objective function of unit mileage (10<sup>4</sup> km) cost (UMC) is put forward to evaluate the system’s initial cost, degradation cost, and hydrogen consumption cost. Furthermore, an average power and state of charge (APS) based Energy Management System (EMS) is proposed, where power-split strategy of FCS and HESS is given, and the output power of FCS is smoothed by the average power of drive cycle power demand, the power of maximum efficiency point and maximum power of FCS, and SOC of HESS. Finally, to solve the hybrid energy source optimization problem, the cancer cell competition and metastasis algorithm (C3MA) is proposed, where an efficient population position updating strategy is used to simulate the competition and metastasis of cancer cells, and the search space can be explored more effectively. C3MA is evaluated using six benchmark functions, demonstrating its robustness and rapid convergence in high-dimensional problems. The size optimization of a 49-ton tractor was conducted. The optimum can always be achieved using APS EMS in conjunction with C3MA, Particle Swarm Optimization (PSO), and Grey Wolf Optimization (GWO). In comparison to discrete wavelet transform (DWT) EMS, APS demonstrated a 16 % reduction in UMC and a 77 % increase in lifespan. Compared to FCS + B configuration, FCS + B + SC reduces UMC by an average of 19 %.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119674"},"PeriodicalIF":9.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488812","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
Refrigerants evaluation and energy performance optimization for a high-temperature carbon dioxide + hydrofluoroolefin / hydrochlorofluoroolefin cascade heat pump dryer with two air heating circuits
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-26 DOI: 10.1016/j.enconman.2025.119677
Yingjie Xu , Liulu Jia , Yufeng Ye , Jiameng Liu , Xi Shen , Xiaohong Han
{"title":"Refrigerants evaluation and energy performance optimization for a high-temperature carbon dioxide + hydrofluoroolefin / hydrochlorofluoroolefin cascade heat pump dryer with two air heating circuits","authors":"Yingjie Xu ,&nbsp;Liulu Jia ,&nbsp;Yufeng Ye ,&nbsp;Jiameng Liu ,&nbsp;Xi Shen ,&nbsp;Xiaohong Han","doi":"10.1016/j.enconman.2025.119677","DOIUrl":"10.1016/j.enconman.2025.119677","url":null,"abstract":"<div><div>The carbon dioxide heat pump is promising for energy savings and emission reductions in the drying industry due to its good performance. However, the efficiency of carbon dioxide gas cooler is low under drying working condition, due to significant temperature glide of supercritical state. Moreover, for many drying materials, the drying temperature provided by current heat pumps is still lower than the optimal drying temperature. To resolve these issues, a new low-carbon refrigerant + carbon dioxide transcritical cascade heat pump drying system has been proposed. In this new system, the discharged carbon dioxide from the compressor of low-temperature stage is cooled by both fresh air and the low-carbon refrigerant through two distinct heat exchangers. System simulation and multi-objective optimization are conducted based on experimentally validated model. The results show that when R1234ze(Z) is used at high temperature stage, the system performs the best, with a maximum coefficient of performance of 1.78, heating capacity of 20.2 kW, condensing temperature of 110 ℃, and low-temperature heat source of 10 ℃. The best individual in Pareto front is selected, with 3.55 × 10<sup>4</sup> CNY/year and 3.47 × 10<sup>4</sup> kg/year. The optimal geometric parameters of components are determined as follows, 3.39 m<sup>2</sup> gas-cooler heat transfer area, 48 m<sup>2</sup> condensing heat transfer area and 9.68 MPa parameters of heat rejection pressure. Additionally, the impact of critical factors on system performance was investigated. The new system and the results of this paper are expected to provide new ideas for high-temperature heat pump drying system and system energy saving.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119677"},"PeriodicalIF":9.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510416","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
Advancements in biodiesel production from castor oil: A comprehensive review
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-22 DOI: 10.1016/j.enconman.2025.119622
Ana V. Veličković , Dragana D. Rajković , Jelena M. Avramović , Ana M. Marjanović Jeromela , Miljana S. Krstić , Vlada B. Veljković
{"title":"Advancements in biodiesel production from castor oil: A comprehensive review","authors":"Ana V. Veličković ,&nbsp;Dragana D. Rajković ,&nbsp;Jelena M. Avramović ,&nbsp;Ana M. Marjanović Jeromela ,&nbsp;Miljana S. Krstić ,&nbsp;Vlada B. Veljković","doi":"10.1016/j.enconman.2025.119622","DOIUrl":"10.1016/j.enconman.2025.119622","url":null,"abstract":"<div><div>Castor (<em>Ricinus communis</em> L.) is a non-food industrial oleaginous crop with the potential for biofuel production. It grows in diverse regions and thrives in marginal soils without competing with food crops. This paper reviews the current state and perspectives of producing biofuels, primarily biodiesel, from castor oil. It begins with a brief introduction to the castor plant, its genetics, and breeding, as well as methods and challenges of castor oil production, extraction, and refinement. Biodiesel production technologies, optimization, kinetics, thermodynamics, and the techno-economic, environmental, and social assessment are discussed. Other castor-based biofuels are highlighted, including bio-jet fuel, biogas, and bioethanol in biorefineries. The future of biofuel production depends on cost-effective and sustainable methods, land availability, and considering various aspects. Challenges remain for large-scale production, but further research can enable castor biomass to become a sustainable and cost-effective feedstock while mitigating environmental and social impacts.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119622"},"PeriodicalIF":9.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471513","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
Clustered carbon capture as a technologically and economically viable concept for industrial post-combustion CO2 capture 集群碳捕获作为工业燃烧后二氧化碳捕获技术和经济上可行的概念
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-21 DOI: 10.1016/j.enconman.2025.119608
Boreum Lee , Hyunjun Lee , Juli Ayu Ningtyas , Manhee Byun , Atabay Allamyradov , Boris Brigljević , Hankwon Lim
{"title":"Clustered carbon capture as a technologically and economically viable concept for industrial post-combustion CO2 capture","authors":"Boreum Lee ,&nbsp;Hyunjun Lee ,&nbsp;Juli Ayu Ningtyas ,&nbsp;Manhee Byun ,&nbsp;Atabay Allamyradov ,&nbsp;Boris Brigljević ,&nbsp;Hankwon Lim","doi":"10.1016/j.enconman.2025.119608","DOIUrl":"10.1016/j.enconman.2025.119608","url":null,"abstract":"<div><div>Industrial CO<sub>2</sub> emission is a primary contributor to the global warming and as such an accelerator of the climate crisis. Countries worldwide have adopted the ‘Paris Agreement’ to restrict the global temperature rise below 2 ℃, and ideally below 1.5 ℃ compared to the pre-industrial levels. Reactive absorption which utilizes aqueous alkanolamine solvents in an absorption and stripping column tandem is the current de-facto standard for a realistic, industrial-scale, post-combustion carbon capture. The solvent regeneration and high concentration CO<sub>2</sub> release in the stripping column represents the bulk of the process’s operating cost, due to high energy requirement of the reboiler unit (∼4–10 GJ / ton CO<sub>2</sub>). This fact alone makes the process prohibitively expensive in both energy and economic terms for many major CO<sub>2</sub> emitting entities such as fossil fuel power plants, cement producers, refineries, etc. To address this issue in this work we present a new process topology concept entitled Clustered Carbon Capture. A cluster of major CO<sub>2</sub> point sources in a variable radius all with CO<sub>2</sub> absorption columns of appropriate scale share a centralized stripper column appropriately sized to regenerate the solvent for all the points in the cluster. As a proof-of-concept this work has 3 sources (300–2,000 MW coal power plants) and a ∼ 35 km radius. Utilizing the economies of scale on the most expensive and energy intensive unit our expected results should quantify the amount of cost reduction for the CO<sub>2</sub> capture for each individual point of the cluster. Provided that the cost reduction is significant, clustered carbon capture might well represent an indispensable strategy for economic CO<sub>2</sub> reduction on a large-scale, utilizing an already proven technology.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119608"},"PeriodicalIF":9.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471558","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
Energy, exergy, economic, and environmental analysis of waste heat source heat pump industrial steam generation system
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-21 DOI: 10.1016/j.enconman.2025.119662
Hang Yin, Shicheng Ying, Guangbin Liu, Qichao Yang, Yuanyang Zhao, Liansheng Li
{"title":"Energy, exergy, economic, and environmental analysis of waste heat source heat pump industrial steam generation system","authors":"Hang Yin,&nbsp;Shicheng Ying,&nbsp;Guangbin Liu,&nbsp;Qichao Yang,&nbsp;Yuanyang Zhao,&nbsp;Liansheng Li","doi":"10.1016/j.enconman.2025.119662","DOIUrl":"10.1016/j.enconman.2025.119662","url":null,"abstract":"<div><div>High-temperature steam is a vital energy for heating, washing, drying, and other industrial processes primarily generated by special coal-fired boilers. The heat pump coupled with the steam compressor is a promising steam generation system due to its high efficiency, high heating temperature, and low pollution. In this paper, a mathematical model of a waste heat source heat pump industrial steam generation system (WHPSG) is developed. The system performance is analyzed using energy, exergy, economy, and environment methods when R245fa, R600, and R601 are selected. The results demonstrate better overall system performance at high waste heat temperature and low condensing temperature than at low waste heat or high condensing temperature. Compared to R245fa and R600, the COP<sub>sys</sub> using R601 increased by 3.4% and 3.8%, and power consumption per unit mass flow rate of steam decreased by 3.3% and 3.7. The condensing temperature influences system performance obviously, while the heat pump compressor and steam compressor account for a large percentage of exergy destruction. The system with R601 has the largest total exergy efficiency, which is higher than R245fa and R600 by about 3.0% and 3.2% respectively. The good economic and environmental benefits showed it can be used for steam generation.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119662"},"PeriodicalIF":9.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471557","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
Geothermal energy-assisted pumped thermal energy storage: Configuration mapping
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-20 DOI: 10.1016/j.enconman.2025.119660
Suzhen Yin, Chuangang Bai, Kaiyue Zheng, Yilun Zhang, Xingpeng Yan, Zhan Liu
{"title":"Geothermal energy-assisted pumped thermal energy storage: Configuration mapping","authors":"Suzhen Yin,&nbsp;Chuangang Bai,&nbsp;Kaiyue Zheng,&nbsp;Yilun Zhang,&nbsp;Xingpeng Yan,&nbsp;Zhan Liu","doi":"10.1016/j.enconman.2025.119660","DOIUrl":"10.1016/j.enconman.2025.119660","url":null,"abstract":"<div><div>Unstable renewable energy sources, including wind and photovoltaic power generation with the inherent characteristics of intermittency and randomness, pose an extremely significant challenges to the safety and stability of electrical grids. Considered a viable solution, energy storage technology increases the flexibility and regulatory capacity of power grids by storing and releasing excess electricity at different times. Pump thermal energy storage technology offers an efficient large-scale electricity storage solution that is completely free from geographical location limitations. Skillfully integrating pumped thermal energy storage technology with low-grade heat can effectively improve its thermodynamic and economic performance. To significantly enhance the utilization rate of geothermal energy and effectively achieve a more optimal performance of pumped thermal energy storage systems, the in-depth and comprehensive study conducted a thermo-economic evaluation of 15 types of geothermal-assisted transcritical pumped thermal energy storage systems. This study provides configuration selection maps for the round trip efficiency and the levelized cost of storage, thereby enabling an extremely effective and swift evaluation of the performance of these various configuration systems. When the geothermal temperature changes within the range from 50 °C to 90 °C, the efficiency of the systems that are considered to be the most suitable under these conditions varies from 66.2 % to 105.6 %. This variation in efficiency occurs when the compressor outlet pressure is optimized within the range from 5 MPa to 8 MPa. The system levelized cost of storage declines as geothermal temperature rises and its minimum value is 0.472 CNY/kWh when the geothermal temperature is 90 °C.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"329 ","pages":"Article 119660"},"PeriodicalIF":9.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444837","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
Towards intelligent management of regional building energy systems: A framework combined with deep reinforcement learning for hybrid energy storage
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-20 DOI: 10.1016/j.enconman.2025.119656
Rendong Shen , Ruifan Zheng , Dongfang Yang , Jun Zhao
{"title":"Towards intelligent management of regional building energy systems: A framework combined with deep reinforcement learning for hybrid energy storage","authors":"Rendong Shen ,&nbsp;Ruifan Zheng ,&nbsp;Dongfang Yang ,&nbsp;Jun Zhao","doi":"10.1016/j.enconman.2025.119656","DOIUrl":"10.1016/j.enconman.2025.119656","url":null,"abstract":"<div><div>The adoption of renewable energy has been increasingly recognized as a viable solution to the rapid growth in building energy consumption. Integrating energy storage units into building energy systems can effectively mitigate uncertainties associated with renewable energy and enhance the balance between energy supply and demand. Compared to single energy storage systems, hybrid energy storage offers greater regulation potential and flexibility. However, the increased complexity of control strategies due to additional regulation variables presents a significant challenge. Furthermore, existing research often neglects the interactive effects between heat pumps and heat storage units. Addressing these issues, this study examines a regional energy system in Tianjin that integrates renewable energy generation, ground source heat pumps, and hybrid energy storage. The operational characteristics of ground source heat pumps are incorporated to optimize the charging and discharging processes of hybrid energy storage systems. Using a multi-agent deep reinforcement learning algorithm, the study adaptively optimizes the coordinated control of hybrid energy storage with the objectives of enhancing system operational benefits and increasing renewable energy utilization. Compared to a benchmark model, the proposed approach improves net system income by 23.64% and reduces underutilized renewable energy by 27.96%.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"329 ","pages":"Article 119656"},"PeriodicalIF":9.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444836","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
Seasonal assessment of a hybrid CCHP-photovoltaic system coupled with CAES for a residential building in Rio de Janeiro: Energetic, exergetic, exergoeconomic and environmental analysis
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-20 DOI: 10.1016/j.enconman.2025.119637
José Eduardo Sanson Portella Carvalho , Florian Pradelle , Romuald Rullière , Rémi Revellin
{"title":"Seasonal assessment of a hybrid CCHP-photovoltaic system coupled with CAES for a residential building in Rio de Janeiro: Energetic, exergetic, exergoeconomic and environmental analysis","authors":"José Eduardo Sanson Portella Carvalho ,&nbsp;Florian Pradelle ,&nbsp;Romuald Rullière ,&nbsp;Rémi Revellin","doi":"10.1016/j.enconman.2025.119637","DOIUrl":"10.1016/j.enconman.2025.119637","url":null,"abstract":"<div><div>Addressing the issues of energy transition requires good practices for better energy management and increase of efficiency, alongside a widespread utilization of renewable energy sources and energy storage, optimized to the consumers’ demands. In this context, a numerical simulation is developed to investigates a trigeneration (electricity, heating, and cooling) scenario applied to a typical on-grid residential building in Rio de Janeiro, Brazil. The studied configuration for the hybrid combined cooling, heat, and power system is mainly composed of photovoltaic panels; a small-scale compressed air storage system with compressors and turbines with intercoolers and preheaters and two air storage tanks; and water tanks functioning as thermal energy storages. The system undergoes an evaluation through an energetic, exergetic, exergoeconomic and environmental (4E) analysis in a quasi-steady state regime. The yearly investigation allows to assess the seasonality effect on the system, and its impacts of different parameters. The results indicate that the proposed system can sustain 94.3 % of the building electric demand. Considering one year of operation, the system has an electric, cogeneration and trigeneration efficiencies of 37.6 %, 41.1 % and 44.3 %, respectively Regarding the exergy performance, the charging process is responsible for most of the exergy destruction of the system due to the low exergy efficiency of the photovoltaic panels. The discharge operation registered a low exergoeconomic factor compared to the charging one. The system operation was able to abate 20.34 tCO<sub>2eq</sub> emissions.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"329 ","pages":"Article 119637"},"PeriodicalIF":9.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453892","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
Thermo-economic performance analysis of two novel isobaric liquid carbon dioxide energy storage systems coupled with pumped hydro storage
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-02-20 DOI: 10.1016/j.enconman.2025.119657
Kun Hou , Boshen Wang , Jiali Guo , Xiangyang Liu , Maogang He
{"title":"Thermo-economic performance analysis of two novel isobaric liquid carbon dioxide energy storage systems coupled with pumped hydro storage","authors":"Kun Hou ,&nbsp;Boshen Wang ,&nbsp;Jiali Guo ,&nbsp;Xiangyang Liu ,&nbsp;Maogang He","doi":"10.1016/j.enconman.2025.119657","DOIUrl":"10.1016/j.enconman.2025.119657","url":null,"abstract":"<div><div>Liquid carbon dioxide energy storage is a promising technology for stabilizing renewable power output; however, the inefficiency and diseconomy caused by non-isobaric storage are generally overlooked. In response, this study proposes two novel isobaric liquid carbon dioxide energy storage systems coupled with pumped hydro storage, the pumped hydro storage-assisted and high backpressure pumped hydro storage-assisted systems. These systems achieve isobaric storage by incorporating hydraulically designed carbon dioxide-water co-storage tanks. The study begins with a dynamic behavior analysis of the basic system, followed by a thermo-economic performance comparison, parametric analysis, and an economic uncertainty analysis based on multi-objective optimization. Results show that neglecting non-isobaric storage in the basic system leads to a 26.44 % discrepancy in total exergy efficiency, a 59.67 % relative deviation in energy storage density and an economic overestimation. By avoiding unsteady-state operation, the high backpressure pumped hydro storage-assisted system outperforms the other two, achieving a total exergy efficiency, levelized cost of storage and net present value of 52.95 %, 0.131 $/kWh and 32.24 M$, respectively, while the pumped hydro storage-assisted system achieves the highest energy storage density at 3.85 kWh/m<sup>3</sup>. To further enhance thermo-economic performance, attention can be paid to key components such as compressor, turbine, condenser and tanks. Additionally, the high backpressure pumped hydro storage-assisted system exhibits the most favorable and stable economic performance, with a levelized cost of storage of 0.154 ± 0.022 $/kWh and a net present value of 22.11 ± 9.05 M$. The system economic viability can be further improved by expanding discharge capacity and operating durations, particularly in regions with favorable electricity price structures.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"329 ","pages":"Article 119657"},"PeriodicalIF":9.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453413","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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