Investigation and optimization of the thermal performance of compressed supercritical CO2 energy storage system based on dynamic modeling and transient simulation

IF 9 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy Pub Date : 2024-11-20 DOI:10.1016/j.renene.2024.121966

Jiahui Jiang , Bin Zhang , Wei Chen , Xuelin Zhang , Dechun Li , Jian Li , Hengdong Li , Xiaodai Xue

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引用次数: 0

Abstract

Compressed CO₂ energy storage is a new type of energy storage with high energy storage density and a compact structure. Understanding the system’s dynamic operational characteristics is crucial for optimizing parameters and developing control strategies. We established two dynamic compressed supercritical CO₂ energy storage systems (SC-CCESs) without additional cold and heat sources and simulated their performance under design conditions. The results show that the single-stage system outperforms the double-stage system. The single-stage system is simulated from design conditions to periodic dynamic operating conditions. Energy and exergy analyses of the single-stage compression system were conducted, confirming that the model aligns with the first and second laws of thermodynamics. The dynamic behavior of the compressor, turbine, and storage tanks was analyzed, and a sensitivity analysis of key system parameters was performed. After optimization, the system’s RTE improved to 63.35%, a 3.09% points increase, and the exergy loss decreased by 10.37% points.

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基于动态建模和瞬态模拟的压缩超临界二氧化碳储能系统热性能研究与优化

压缩二氧化碳储能是一种新型储能技术，具有储能密度高、结构紧凑的特点。了解系统的动态运行特性对于优化参数和制定控制策略至关重要。我们建立了两个无额外冷热源的动态压缩超临界二氧化碳储能系统（SC-CCES），并模拟了它们在设计条件下的性能。结果表明，单级系统的性能优于双级系统。对单级系统进行了从设计条件到周期性动态运行条件的模拟。对单级压缩系统进行了能量和放能分析，证实该模型符合热力学第一和第二定律。分析了压缩机、涡轮机和储气罐的动态行为，并对关键系统参数进行了敏感性分析。优化后，系统的 RTE 提高到 63.35%，增加了 3.09 个百分点，放能损失减少了 10.37 个百分点。

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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

期刊介绍： Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.