侧风环境下湿式冷却塔性能参数变化规律的试验研究(高明; 孙奉仲; 史月涛; 王凯; 赵…

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侧风环境下湿式冷却塔性能参数变化规律的试验研究水利论文 `n s5dwOm

J t?(ic%d [-O Y0【作者】高明; 孙奉仲; 史月涛; 王凯; 赵元宾 【作者单位】山东大学能源与动力工程学院

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【论文摘要】 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,本研究根据相似理论,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0.4m/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0.4m/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。水利论文M w}5qI6p2r7gn

~ Wr@j"E%S5y0【英文论文摘要】 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,are studied by thermal state model experiment based on similarity theory.Researches show that Merkel number and Lewis number decrease firstly,then increase with cross-wind velocity increasing,and the knee point value is equal to 0.4m/s.And the cross-wind deteriorates heat and mass transfer performance when the wind velocity is less than 0.7~0.8m/s.The decreasing amplitude of Merkel number and Lewis number reaches to the maximum,is 20% and 25%,respectively.That is,the heat and mass transfer performance reaches to the minimum when cross-wind velocity is equal to 0.4m/s.水利论文-u+Z-H1l]~K;][|

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【论文关键词】 侧风; 冷却数; 刘易斯数; 传热传质性能; 冷却塔
m7gC.F:yDq0【英文论文关键词】 Cross-wind; Merkel number; Lewis number; Heat and mass transfer performance; Cooling tower

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