光伏-光热电站中熔盐电加热器配置方式及其热力学分析

刘义达; 胡亦工; 赵梦娣; 张森; 王妮妮; 赵力

doi:10.19805/j.cnki.jcspe.2026.250574

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光伏-光热电站中熔盐电加热器配置方式及其热力学分析

新能源与储能 | 更新时间：2026-07-16

- 光伏-光热电站中熔盐电加热器配置方式及其热力学分析
- Configuration and Thermodynamic Performance Analysis of Molten Salt Electric Heaters in PV-CSP Hybrid Power Plants
- 动力工程学报 2026年46卷第7期页码：39-49
- 作者机构：
  
  1. 山东电力工程咨询院有限公司,山东,济南,250013
  2. 天津大学先进内燃动力全国重点实验室,天津,300350
- 作者简介：
  
  刘义达(1987—),男,山东聊城人,正高级工程师,研究方向为太阳能热发电技术、先进能源动力系统优化设计技术。赵力(通信作者),男,教授,博士,E-mail:jons@tju.edu.cn。
- 基金信息：
  
  国家电力投资集团C类课题资助项目(37-K2024-181)
- DOI：10.19805/j.cnki.jcspe.2026.250574
  中图分类号： TK114
- 纸质出版：2026
- 稿件说明：
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刘义达, 胡亦工, 赵梦娣, 张森, 王妮妮, 赵力. 光伏-光热电站中熔盐电加热器配置方式及其热力学分析[J]. 动力工程学报, 2026, 46(7): 39-49.
刘义达, 胡亦工, 赵梦娣, 张森, 王妮妮, 赵力. 光伏-光热电站中熔盐电加热器配置方式及其热力学分析[J]. 动力工程学报, 2026, 46(7): 39-49. DOI： 10.19805/j.cnki.jcspe.2026.250574.

DOI： 10.19805/j.cnki.jcspe.2026.250574

摘要

以新疆某光伏-光热(photovoltaic-concentrating solar power

PV-CSP)电站(含100 MW光热)为研究对象

设计了3种电加热器配置构型:构型一为电加热高温熔盐并联于蒸汽发生段;构型二为电加热低温熔盐并联于给水预热段;构型三为电加热按照功率比例分级配置于低高温双段储热。对40%~100%汽轮机热耗率验收(turbine heat acceptance

THA)多负荷工况的模拟分析表明:构型一在全负荷条件下可以实现最高热效率、往返效率及效率

100%THA工况下分别为45.12%、54.73%和69.67%;构型二具备高压加热器替代能力

可以减少抽汽并支持机组超额发电

29.8 MW的电加热器可以实现100%THA工况运行下的高压加热器完全替代;构型三虽然可以增强运行冗余性且具有负荷分担潜力

但是其对性能改善有限且增加了系统复杂性。因此

针对该PV-CSP耦合电加热熔盐储热系统

建议优选构型一。

Abstract

Taking a photovoltaic-concentrating solar power (PV-CSP) hybrid power plant (including 100 MW CSP) in Xinjiang Uygur autonomous region as the research object

following three system configurations were designed: configuration Ⅰ integrates electric heaters for high-temperature molten salt in parallel with the steam generation section of CSP system; configuration Ⅱ integrates electric heaters for low-temperature molten salt in parallel with the feedwater preheating section; configuration Ⅲ allocates electric heaters proportionally across the low-and high-temperature molten salt storage sections. Simulation analyses under multi-load conditions ranging from 40% to 100% turbine heat acceptance (THA) show that: configuration Ⅰ achieves the highest thermal efficiency

round-trip efficiency

and exergy efficiency under full load conditions

which reaching 45.12%

54.73%

and 69.67% under 100% THA condition

respectively; configuration Ⅱ exhibits strong capability in replacing high-pressure feedwater heaters

which can effectively displace extraction steam and realize excess power generation

and the high-pressure feedwater heaters can be completely replaced by a electric heater with 29.8 MW power under 100% THA condition; although configuration Ⅲ can enhance operational redundancy and has the potential for load sharing

its improvement in performance is limited and it increases the system complexity. Therefore

for the PV-CSP coupled electric-heating molten salt storage system

configuration Ⅰ is recommended as the optimal choice.

关键词

Keywords

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