Research on Heat Exchange Capacity Attenuation Characteristics of Air-Cooled Heat Exchange Systems for Converter Transformers under the Influence of Environmental Winds

YANG Yao; LI Zaoyang; WANG Junlan; LUO Jinping; LIU Lijun; ZHAO Xinyang; CHEN Haoyang; YANG Chen

doi:10.7652/xjtuxb202412008

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Research on Heat Exchange Capacity Attenuation Characteristics of Air-Cooled Heat Exchange Systems for Converter Transformers under the Influence of Environmental Winds

更新时间：2025-07-28

- Research on Heat Exchange Capacity Attenuation Characteristics of Air-Cooled Heat Exchange Systems for Converter Transformers under the Influence of Environmental Winds
- Vol. 58, Issue 12, Pages: 78-88(2024)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 国网宁夏电力有限公司超高压公司,银川,750000
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202412008
  CLC： TK124
- Online First：10 December 2024，
  
  Published：2024
- 稿件说明：
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YANG Yao, LI Zaoyang, WANG Junlan, et al. Research on Heat Exchange Capacity Attenuation Characteristics of Air-Cooled Heat Exchange Systems for Converter Transformers under the Influence of Environmental Winds[J]. 2024, 58(12): 78-88.
DOI：

YANG Yao, LI Zaoyang, WANG Junlan, et al. Research on Heat Exchange Capacity Attenuation Characteristics of Air-Cooled Heat Exchange Systems for Converter Transformers under the Influence of Environmental Winds[J]. 2024, 58(12): 78-88. DOI： 10.7652/xjtuxb202412008.

摘要

为实现换流变压器冷却系统换热容量的合理设计并保障其安全稳定运行

研究了环境风影响下换流变压器空冷换热系统换热能力的衰减特性。针对北方某换流站换流变压器

采用基于空冷换热系统大尺度热量传递与换热器翅片管束小尺度换热计算相耦合的方法

建立了包含空冷换热器、风机、防火墙、环境风等多种因素在内的三维传热流动数值分析模型。研究了环境风向及风速对空冷换热系统换热能力的负面影响机制

获得了真实环境条件下换热能力的衰减特性。结果表明:正前方风向下

换热器进风体积流量随风速增加而显著减小、进气温度略有下降

导致不同风速下换热效率维持在66.01%～66.75%之间; 侧方风向下

迎风侧防火墙阻碍了气流运动

导致换热效率随风速增加在55.98%～83.13%之间变化

其中环境风速为6 m/s时换热效率最低; 正后方风向下

与风机出流方向相同的环境风引起换热器附近更加剧烈的热风回流

导致换热效率随风速增加

在50.96%～91.46%之间变化

其中环境风速9 m/s时换热效率最低。研究结果可为换流变压器空冷换热系统换热容量的设计提供一定的参考。

Abstract

In order to achieve a rational design of the heat exchange capacity of cooling systems for converter transformers and ensure their safe and stable operation

the attenuation characteristics of heat exchange capacity of air-cooled heat exchange systems for converter transformers under the influence of environmental winds are investigated. For a converter transformer in a northern converter station

a three-dimensional numerical analysis model of heat transfer flow

incorporating factors like air-cooled heat exchanger

fan

firewall

and environmental wind

is established using a method that combines large-scale heat transfer in the air-cooled heat exchange system with small-scale heat calculation of finned tube bundles. The negative influence mechanisms of environmental wind direction and wind speed on the heat exchange capacity of the air-cooled heat exchange systems are examined to determine the attenuation characteristics of the heat exchange capacity under the real environmental conditions. The results show that under the headwind

the volumetric flow rate into the heat exchanger significantly decreases with increasing wind speed

with a slight drop in inlet air temperature

maintaining heat exchange efficiency between 66.01% and 66.75% across various wind speeds; under the crosswind

the windward firewall hinders airflow

causing the heat exchange efficiency to vary between 55.98% and 83.13% as wind speed rises

reaching its lowest point at an environmental wind speed of 6 m/s; under the tailwind

environmental winds aligning with fan outflow intensify heat recirculation near the heat exchanger

resulting in heat exchange efficiency varying between 50.96% and 91.46% with increasing wind speed

reaching its lowest at an environmental wind speed of 9 m/s. The research results provide valuable references for designing the heat exchange capacity of air-cooled heat exchange systems for converter transformers.

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