中国电机工程学报2025，Vol.45Issue(14)：5369-5380,中插3,13.DOI:10.13334/j.0258-8013.pcsee.241667
一种耦合光热的超临界二氧化碳储能发电系统性能分析
Performance Analysis of A Supercritical Carbon Dioxide Energy Storage and Power Generation System With Integrated Photothermal Unit
摘要
Abstract
Carbon dioxide energy storage(CES)is a new type of compressed gas energy storage technology that combines high energy storage efficiency,high geographical adaptability,safety and environmental protection,and has received widespread attention in the industry.This article proposes a supercritical carbon dioxide energy storage power generation system(SCES-CSTP)coupled with concentrated photothermal utilization and an improved system(SCES-CSTP+SC)using split flow recompression and two-stage heat recovery,exploring the complementary advantages of photothermal molten salt units and supercritical carbon dioxide energy storage.The results show that increasing the energy storage pressure ratio and heating temperature can improve energy storage efficiency and density,but there is an optimal value for the energy storage pressure ratio.The optimized SCES-CSTP system has energy storage efficiency and electrical efficiency of 72.37%and 432.9%,respectively,with the energy storage pressure ratio of 4.0 and the heating temperature of 773.15 K.The energy storage density is 12.94 kW·h/m3,and the energy efficiency is 74.4%.The SCES-CSTP+SC system significantly enhances the heat transfer and system performance of the regenerator.When the optimal split ratio is 0.15 and the heating temperature is 713.15 K,the highest energy storage efficiency is 75.51%.The total energy loss is reduced to 526.62 kW,and the energy efficiency is improved to 77.7%.The research results reflect the positive impact of photothermal energy on the performance improvement of supercritical CO2 energy storage systems.关键词
超临界二氧化碳储能/光热利用/最优工况/热力学分析/㶲分析Key words
supercritical carbon dioxide energy storage/photothermal utilization/optimal working conditions/thermodynamic analysis/exergy analysis分类
能源科技引用本文复制引用
郝佳豪,郑平洋,越云凯,张振涛,杨俊玲,李亚南,于泽..一种耦合光热的超临界二氧化碳储能发电系统性能分析[J].中国电机工程学报,2025,45(14):5369-5380,中插3,13.基金项目
中央引导地方科技发展专项资金项目(2022ZY0048) （2022ZY0048）
中国科学院稳定支持基础研究领域青年团队计划(YSBR-043). Special Fund for Central Guiding Local Science and Technology Development(2022ZY0048) （YSBR-043）
CAS Project for Young Scientists in Basic Research(YSBR-043). （YSBR-043）
