Research on system design and capacity calculation method for deep peak shaving of coal-fire unit based on molten salt heat storage assistance

MA Tingshan; WANG Wei; WANG Dongye; LUO Qing; GENG Ruyi; ZHANG Jianyuan; JU Wenping; CHANG Dongfeng; ZHANG Guolong

doi:10.19666/j.rlfd.202305055

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Research on system design and capacity calculation method for deep peak shaving of coal-fire unit based on molten salt heat storage assistance

更新时间：2025-09-28

- Research on system design and capacity calculation method for deep peak shaving of coal-fire unit based on molten salt heat storage assistance
- Thermal Power Generation Vol. 52, Issue 7, Pages: 113-118(2023)
- 作者机构：
  
  1. 高效灵活煤电及碳捕集利用封存全国重点实验室
  2. 西安热工研究院有限公司
  3. 西安西热节能技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202305055
  CLC： TM621
- Published：2023
- 稿件说明：
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MA Tingshan, WANG Wei, WANG Dongye, et al. Research on system design and capacity calculation method for deep peak shaving of coal-fire unit based on molten salt heat storage assistance[J]. Thermal power generation, 2023, 52(7): 113-118.
DOI：

MA Tingshan, WANG Wei, WANG Dongye, et al. Research on system design and capacity calculation method for deep peak shaving of coal-fire unit based on molten salt heat storage assistance[J]. Thermal power generation, 2023, 52(7): 113-118. DOI： 10.19666/j.rlfd.202305055.

摘要

构建以新能源为主体的新型电力系统对于煤电机组深度调峰提出了更高的要求，通过对电网需求的分析以及各种储能技术的对比，以燃煤发电机组的系统特征为出发点，提出了一种基于熔盐储热辅助煤电机组深度调峰的系统，并给出了其运行方式。通过理论分析，给出了熔盐系统加热、储热、换热3个子系统的主要参数计算方法；以某660 MW燃煤机组为例，在分析其热力边界和调峰需求的基础上，依照提出的计算方法，计算得到了熔盐系统电加热模块的功率以及连接方式；选定了熔盐的种类以及换热系统的进出口参数；确定了熔盐储热的容量、用盐量和储罐容积，为准确核算项目投资和项目占地提供了可靠的数据支撑。该系统以及计算方法可为同类型工程项目前期设计提供参考。

Abstract

Building a new power system focusing on new energy resources puts forward higher requirements for deep peak shaving of coal power unit. Through the requirement analysis of power grid and the comparison of various energy storage technologies

taking the system characteristics analysis of coal power unit as the starting point

a system and a operation mode were given which were based on molten salt thermal storage to assist deep peak shaving of coal power unit. Through theoretical analysis

the calculation methods of the main parameters of subsystems including the heating

heat storage and heat exchange of the molten salt system have been put forward.Taking a 660 MW coal-fired unit as an example

based on the analysis of the thermal boundary and peak shaving demand

the power and connection mode of the electric heating module of the molten salt system are calculated using the calculation method proposed in this article. The types of molten salt and the inlet and outlet parameters of the heat exchange system are selected. The capacity

salt consumption and tank volume of molten salt heat storage are determined. All the results provide reliable data support for accurate accounting of project investment and land occupation. This system and calculation method can provide reference for the preliminary design of similar projects.

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