Study on energy-saving reconstruction plans for cold end system of indirect air cooling units

Lü Kai; LEI Yanrong; PENG Peng; ZHANG Xingkui; YE Jun; CHEN Shengli; PENG Dingyun

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Study on energy-saving reconstruction plans for cold end system of indirect air cooling units

更新时间：2025-09-28

- Study on energy-saving reconstruction plans for cold end system of indirect air cooling units
- Thermal Power Generation Vol. 45, Issue 12, Pages: 89-94(2016)
- 作者机构：
  
  1. 西安西热节能技术有限公司
  2. 华能陕西秦岭发电有限公司
  3. 浙江万享科技有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2016
- 稿件说明：
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Lü Kai, LEI Yanrong, PENG Peng, et al. Study on energy-saving reconstruction plans for cold end system of indirect air cooling units[J]. Thermal power generation, 2016, 45(12): 89-94.
DOI：

Lü Kai, LEI Yanrong, PENG Peng, et al. Study on energy-saving reconstruction plans for cold end system of indirect air cooling units[J]. Thermal power generation, 2016, 45(12): 89-94. DOI：

摘要

针对间接空冷机组夏季运行背压偏高、能耗较高等问题

借鉴近年来直接空冷系统技术改造经验

根据在不改变现有空冷系统冷却能力的前提下

设置尖峰冷却系统分流进入主机凝汽器的排汽

降低主机凝汽器热负荷

或者在冷端系统热负荷不变的前提下

增容改造

提高空冷系统冷却能力的技术思路

提出了5种技术改造方案。以某600 MW间接空冷机组为例

计算分析了采用蒸发冷却技术

将换热器和喷淋水冷却设备合二为一方案的改造效果。结果表明:相同负荷下随着环境气温降低

机组降背压效果逐步减弱;相同气温下随着机组负荷下降

降背压效果逐步减弱;将换热器和喷淋水冷却设备合二为一的方案

极大地节省了空间和系统配置

现场布置方便。

Abstract

Taking several successful technological transformation cases on direct air cooling system recently as technical reference

five technological transformation plans are proposed

which focus on the questions at high temperature in summer such as high back-pressure and large coal consumption for power generation.The peak cooling system will distribute part of steam turbine exhaust and the ACC heat load reduces with the fixed cooling capacity of air cooling system.Or the capacity-increasing will improve the cooling capacity with the fixed heat load of cold end system.Technical plan of evaporative cooling technology combines heat exchanger and spray water cooling equipment together

which significantly saves space and simplifies system configuration

as well as shows extremely strong field operability.Taking a 600 MW indirect air cooling unit as an example

calculation of application effect is performed and change law of back-pressure drap effect with environmental temperature and load is obtained.For a fixed load

the effect decreases gradually with the ambient air temperature.For a fixed temperature

the effect drops gradually with the wnit load.

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Related Author

LU Kai

LEI Yanrong

PENG Peng

ZHANG Xingkui

YE Jun

CHEN Shengli

PENG Dingyun

XUE Zhiheng

Related Institution

Xi'an TPRI Energy Conservation Technology Co.,Ltd.

Huaneng Shaanxi Qinling Power Generation Co.,Ltd.,Huayin

Zhejiang Wanxiang Science and Technology Co.,Ltd.,Changxing

Xi’an Thermal Power Research Institute Co., Ltd.

Xi’an TPRI Energy Conservation Technology Co., Ltd.

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