气侧均流装置对冷却三角单元流动传热特性影响的实验研究

Experimental Study on the Influence of Air Side Equalizing Device on the Flow Heat Transfer Characteristics of Cooling Delta Unit

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中文摘要：对于间接空冷系统冷端基本传热元件-冷却三角单元,通过在其加装及相邻未加装气侧均流装置冷却三角单元内的两侧冷却柱沿散热管束横向布置风速、风温、壁温测点,进一步在左右两侧出水柱布置壁温测点,对比分析两侧冷却柱沿散热管束横向迎风风速、风温、壁温及出水壁温的变化规律,研究气侧均流装置对冷却三角单元流动传热特性及出水壁温分布的影响机制.研究结果表明:加装气侧均流装置后冷却三角单元两侧冷却柱沿散热管束横向迎风风温、壁温分布更加均匀,两侧出水柱壁温均值更低,且降低了两侧出水柱壁温差,气侧均流装置优化了两侧冷却柱的换热均匀性.

外文摘要：For the cooling delta unit,the basic heat transfer element of the cold end of the indirect air-cooling system,the wind speed,air temperature,and wall temperature measuring points were arranged laterally along the heat transfer bundle in the cooling columns on both sides of cooling delta with or without air equalizing apparatus.The wall temperature measuring points were further arranged on the left and right side of water outlet cooling columns.The changes of lateral windward wind speed,wind temperature,wall temperature and outlet water temperature of the cooling columns on both sides along the heat transfer bundles were compared and analyzed.And the influence mechanisms of the air equalizing apparatus on the flow and heat transfer characteristics of the cooling delta unit and the outlet water temperature were studied.The results show that,with the air equalizing apparatus,the distribution of lateral windward wind speed and wall temperature of the two sides cooling columns are more uniform along the heat transfer bundle.

外文关键词：

coal-fired power unitindirect air-cooling systemcooling deltaair side equalizing deviceflow heat transferwater temperature distribution

作者：

郭滔、于海洋、冯海波、袁汉川、田兵、杨玉杰、赵元宾、赵倩

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作者单位：

国能浙能宁东发电有限公司,宁夏回族自治区银川市 750408

国能沪电(上海)工程技术有限公司,上海市普陀区 200062

济南蓝辰能源技术有限公司,山东省济南市 250101

山东大学能源与动力工程学院,山东省济南市 250061

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关键词：

煤电机组间接空冷系统冷却三角单元气侧均流装置流动传热水温分布

基金：

国家自然科学基金项目山东省科技型中小企业创新能力提升工程国家能源集团宁夏电力有限公司科技创新项目

项目编号：

516061122022TSGC1026NXDL-2022-28

出版年：

2024

DOI：

10.12096/j.2096-4528.pgt.22094

发电技术

华电电力科学研究院

发电技术

CSTPCD

影响因子：0.388

ISSN：2096-4528

年,卷(期)：2024.45(1)

参考文献量6