Characteristic Analysis of the Unit with Low-pressure Cylinder Zero-output Integrated with Heat Storage Tank

LU Shuyin; WANG Zijie; ZHAO Ziliang; XU Huijuan; GU Yujiong

doi:10.19805/j.cnki.jcspe.2025.240215

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Characteristic Analysis of the Unit with Low-pressure Cylinder Zero-output Integrated with Heat Storage Tank

更新时间：2026-10-10

- Characteristic Analysis of the Unit with Low-pressure Cylinder Zero-output Integrated with Heat Storage Tank
- Chinese Journal of Power Engineering Vol. 45, Issue 6, Pages: 953-960(2025)
- 作者机构：
  
  1. 华北电力大学能源动力与机械工程学院,北京,102206
  2. 河北科技工程职业技术大学, 河北省人机环境热控制技术与装备重点实验室,河北,邢台,054000
  3. 华北电力大学国家火力发电工程技术研究中心,北京,102206
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240215
  CLC：
- Online First：16 June 2025，
  
  Published：2025
- 稿件说明：
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陆树银,王子杰,赵梓良,许慧娟,顾煜炯. 低压缸零出力机组耦合蓄热罐特性分析动力工程学报, 2025, 45(6): 953-960 https://doi.

org/10.19805/j.cnki.jcspe.2025.240215
陆树银,王子杰,赵梓良,许慧娟,顾煜炯. 低压缸零出力机组耦合蓄热罐特性分析动力工程学报, 2025, 45(6): 953-960 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240215.

org/10.19805/j.cnki.jcspe.2025.240215 DOI：

摘要

为了解决低压缸零出力机组形成的强热电耦合的问题

同时减少机组在抽凝和零出力模式下频繁切换

提出了机组耦合蓄热罐的运行方式。以某600 MW机组为研究对象

基于Ebsilon软件建立了低压缸零出力机组的热力学模型

并耦合蓄热罐在该模型中

比较分析了机组在不同运行模式下供热可行域、能量利用率和效率的变化情况。结果表明:低压缸零出力耦合蓄热罐可大幅度拓宽机组运行的热电可行域

最大供热能力从原来的799.28 MW提高到1 016.35 MW;提供基础供热负荷时

机组的深度调峰能力增加了122.38 MW;机组的能量利用率和效率与锅炉负荷、蓄热罐放热功率呈正相关

而供热功率对二者呈现不一样的影响规律

蓄热罐的储放热功率对较低锅炉负荷的能量利用率和效率影响更大。

Abstract

To address the issue of strong heat-power coupling of the unit with low-pressure cylinder zero-output

and reduce the frequent switching of the unit between the extraction-condensation and zero-output modes

the operation mode of the unit integrated with the heat storage tank was proposed. With a 600 MW unit as the research object

the thermodynamic model of the unit with low-pressure cylinder zero-output was developed based on the Ebsilon software

and the heat storage tank was coupled in the model. The changes of the feasible heating domain

energy utilization efficiency and exergy efficiency of the unit in different operation modes were comparatively analyzed. Results show that the integration of the heat storage tank within the low-pressure cylinder zero-output unit can significantly broaden the heat-power feasible operation domain of the unit

and the maximum heat supply capacity is increased from the 799.28 MW to 1 016.35 MW. The deep peaking capacity of the unit is increased by 122.38 MW when the base heating load is supplied. The unit's energy utilization efficiency and exergy efficiency are positively correlated with the boiler load and the heat release power of the heat storage tank

whereas the heating power presents different influence laws on the energy utilization efficiency and exergy efficiency of the unit. The heat storage and release power of the heat storage tank has a greater influence on the energy utilization efficiency and exergy efficiency at lower boiler loads.

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