热力发电2025，Vol.54Issue(10)：11-20,10.DOI:10.19666/j.rlfd.202412248
压缩蒸汽与熔盐储热辅助燃煤机组调峰方案性能分析
Performance analysis of compressed steam and molten salt thermal storage assisted peaking scheme for coal-fired units
摘要
Abstract
The current coal-fired unit coupled with molten salt heat storage system technology has the problems of limited peak shifting capacity and poor peak heat economy.To address these issues,a new system of coal-fired unit coupled with compressed steam and molten salt heat storage is proposed,specifically including single molten salt heat storage scheme and double-molten-salt-heat-storage scheme.The system performs multi-stage compression of extracted steam through a multi-stage compressor and uses molten salt for heat storage.The compressed steam is eventually condensed to water so that its latent heat of condensation will be utilized.The simulation model of the coupled system scheme is established by EBSILON software.The research results indicate that,compared with the conventional molten salt heat storage technology scheme,the compressed steam and molten salt heat storage system can effectively reduce the effect of steam extraction and heat storage on the thermal economy of the system,and expand the peaking range of the unit.Specifically,the round-trip efficiencies of the single molten salt and double-molten-salt scheme are improved from 27.43%～38.03%to 62.13%～64.56%and 65.69%～66.93%,respectively,and the minimum outputs are reduced from 20.91%Pe to 19.84%Pe and 19.28%Pe,respectively,compared with the conventional scheme.Considering the thermodynamic and economic performance of the system,the single molten salt scheme is the best choice.关键词
热能储存/蒸汽压缩/深度调峰/经济分析Key words
thermal energy storage/steam compression/deep peaking/economic analysis引用本文复制引用
王森,李天新,韩兆威,潘佩媛,张乃强..压缩蒸汽与熔盐储热辅助燃煤机组调峰方案性能分析[J].热力发电,2025,54(10):11-20,10.基金项目
国家自然科学基金项目(52106008) （52106008）
中央高校基本科研业务费专项资金(2023MS015)National Natural Science Foundation of China(52106008) （2023MS015）
Fundamental Research Funds for the Central Universities(2023MS015) （2023MS015）
