Investigation on the Effects of the Integration Modes of Molten Salt Heat Storage System on Deep Peak Shaving and Flexibility Operation of Coal-fired Thermal Power Plants

黄张驰; 周月桂; 王玉亭

doi:10.19805/j.cnki.jcspe.2026.240660

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Investigation on the Effects of the Integration Modes of Molten Salt Heat Storage System on Deep Peak Shaving and Flexibility Operation of Coal-fired Thermal Power Plants

更新时间：2026-02-03

- Investigation on the Effects of the Integration Modes of Molten Salt Heat Storage System on Deep Peak Shaving and Flexibility Operation of Coal-fired Thermal Power Plants
- Chinese Journal of Power Engineering Vol. 46, Issue 1, Pages: 112-120(2026)
- 作者机构：
  
  1. 上海交通大学智慧能源创新学院,上海,200240
  2. 上海交通大学机械与动力工程学院, 热能工程研究所,上海,200240
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240660
  CLC：
- Published Online：15 January 2026，
  
  Published：15 January 2026
- 稿件说明：
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黄张驰,周月桂,王玉亭. 熔盐储热系统集成方式对燃煤火电机组深度调峰和灵活性运行的影响研究动力工程学报, 2026, 46(1): 112-120 https://doi.

org/10.19805/j.cnki.jcspe.2026.240660
黄张驰,周月桂,王玉亭. 熔盐储热系统集成方式对燃煤火电机组深度调峰和灵活性运行的影响研究动力工程学报, 2026, 46(1): 112-120 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240660.

org/10.19805/j.cnki.jcspe.2026.240660 DOI：

摘要

为了提高燃煤火电机组深度调峰和灵活性运行能力

采用EBSILON仿真软件建立了某330 MW亚临界燃煤火电机组与熔盐储热耦合的热力系统模型

分析比较了熔盐储热阶段不同抽汽、汇汽方式对耦合系统调峰性能和往返效率的影响

并提出了一种基于能量梯级利用的新型释热模式。模拟结果表明:抽主蒸汽加热熔盐的调峰容量为抽再热蒸汽的1.58倍

但受限于饱和蒸汽温度

耦合系统的往返效率比抽再热蒸汽低8.08%~28.52%;抽汽与熔盐换热后的汇汽点越靠近低压缸进汽侧

耦合系统的往返效率越高

其差值最高可达28.77%

但机组调峰容量越小;所提出的新型释热模式在用电高峰期可迅速释放16.40%额定功率的额外发电负荷

其耦合系统的往返效率最高可达66.75%。

Abstract

In order to further improve the deep peak shaving capacity and flexibility operation of coal-fired thermal power plants

a thermodynamic system model of a 330 MW subcritical coal-fired thermal power plant coupled with the molten salt heat storage was established with EBSILON software to analyze the effects of different steam extraction and convergence modes on the coupled system's peak shaving performance and round-trip efficiency during the heat storage stage

and a new heat discharging mode based on energy cascade utilization was proposed. The numerical results show that the peak shaving capacity of extracting the main steam to heat the molten salt is 1.58 times that of extracting the reheat steam

but the round-trip efficiency of the coupled system is lower by 8.08%-28.52% than that of extracting the reheat steam due to the limit of the saturated steam temperature. The closer the steam convergence point after the extracted steam exchanges the heat with the molten salt system is to the steam inlet side of the low pressure cylinder

the higher the round-trip efficiency of the coupled system is with the difference of up to 28.77%

but the lower the peak shaving capacity is. The new heat discharging mode can rapidly activate an additional generation load of 16.40% of the rated power during the peak electricity consumption

and the round-trip efficiency of the coupled system is up to 66.75%.

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