侧风环境下湿式冷却塔性能参数变化规律的试验研究  

Experimental research on variational rules of performance parameters for wet cooling tower under cross-wind conditions

作　　者：王妮妮 高明[2] 刘杰 曲宁 李航 

机构地区：[1]山东省电力工程咨询院有限公司,山东济南250013 [2]山东大学能源与动力工程学院,山东济南250061 [3]宁夏宁鲁煤电有限责任公司,宁夏灵武751410

出　　处：《能源工程》2011年第6期29-32,共4页Energy Engineering

基　　金：山东省自然科学基金(青年基金)资助项目(ZR2011EEQ018);国家自然科学基金(青年基金)资助项目(51106092)

摘　　要：外界侧风在很大程度上影响自然通风逆流湿式冷却塔的传热传质性能,根据相似理论,通过热态模型试验,以冷却数和刘易斯数为出发点,研究了外界侧风对冷却塔传热传质性能的影响。研究发现:冷却数和刘易斯数随着外界侧风的变化呈现先减小后增大的趋势,拐点风速值为0.4 m/s;当外界侧风风速小于0.7～0.8m/s时,侧风的存在严重恶化了传热传质性能,当风速为0.4 m/s时,冷却数和刘易斯数的降幅最大,分别为20%和25%,即此时冷却塔的传热传质性能最差。The cross-wind deteriorates heat and mass transfer performance inside cooling tower to a great extent. The detailed effects of cross-wind on heat and mass transfer performance, including Merkel number and Lewis number, were studied by thermal state model experiment based on similarity theory. Researches showed that Merkel number and Lewis number decreased firstly, then increased with cross-wind velocity increasing, and the knee point value was equal to 0. 4 m/s. The cross-wind deteriorated heat and mass transfer performance when the wind velocity was less than 0.7 0.8 m/s. The decreasing amplitude of Merkel number and Lewis number reached to the maximum, which were 20% and 25% respectively. The heat and mass transfer performance reached to the minimum when cross-wind velocity was equal to 0.4 m/s.

关 键 词：侧风 冷却数 刘易斯数 传热传质性能 冷却塔 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]