电力科技与环保2026，Vol.42Issue(4)：591-601,11.DOI:10.19944/j.eptep.1674-8069.2026.04.008
相变材料储热系统对大型火电机组调峰性能影响的研究
Study on the impact of phase change material thermal storage systems on peak-shaving performance of large thermal power units
摘要
Abstract
[Objective]To enhance the peak-shaving flexibility and grid load response capability of large-scale thermal power units,and to address the issue of insufficient deep peak-shaving capacity of conventional coal-fired units under high-penetration renewable energy integration,this study explores a deep integration pathway between a high-temperature phase change thermal storage system and the thermodynamic cycle of a 1 000 MW ultra-supercritical coal-fired unit.[Methods]Based on the EBSILON Professional 17.0 simulation platform,a coupled unit-PCM thermal storage thermodynamic model was established with Al-12Si eutectic alloy selected as the thermal storage medium.Three steam extraction schemes were designed for the charging stage(A:main steam;B:reheat steam;C:main+reheat steam),and three heat release paths were designed for the discharging stage(a:deaerated water to low-pressure cylinder inlet;b:No.3 HP heater inlet → No.1 HP heater outlet;c:No.3 LP heater inlet → No.1 HP heater outlet),forming nine coupled schemes.Comprehensive comparisons were conducted from multiple perspectives,including peak-shaving capacity,thermal efficiency,standard coal consumption,exergy efficiency,and round-trip efficiency.[Results]The results indicate that Scheme A-b exhibits the best overall performance:at a 90 MW charging-discharging load,the peak-shaving capacity reaches 173.95 MW,with an exergy efficiency of 43.92%and a round-trip efficiency of 50.10%,all outperforming the other schemes,while achieving the lowest standard coal consumption.Among the charging schemes,Scheme A provides the largest peak-shaving capacity;among the discharging schemes,Scheme b demonstrates the optimal peak-shaving performance and thermal efficiency.[Conclusion]Reasonable selection of main steam thermal storage coupled with high-pressure regenerative heat release paths can significantly broaden the unit's load regulation range and enhance ramp rates under safe operation,offering a feasible technical pathway for flexibility retrofitting of large-scale thermal power units and renewable energy accommodation.关键词
相变储热/火电机组/调峰/EBSILON仿真/高温相变材料Key words
phase change thermal storage/thermal power units/peak shaving/ebsilon simulation/high-temperature phase change materials分类
能源科技引用本文复制引用
孙小奇,李德波,方立军,金凤雏,薛天华..相变材料储热系统对大型火电机组调峰性能影响的研究[J].电力科技与环保,2026,42(4):591-601,11.基金项目
广东省能源产业科技创新项目 （）
