| 水膜热阻修正系数对填料饱和器性能的影响 |
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| 引用本文： | 易志银,宋华芬.水膜热阻修正系数对填料饱和器性能的影响[J].动力工程,2011,31(6). |
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| 作者姓名： | 易志银 宋华芬 |
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| 作者单位： | 上海交通大学叶轮机械研究所,上海,200240 |
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| 摘 要： | 以单膜理论为基础,研究了饱和器内水与空气之间传热传质的过程,引入水膜热阻修正系数K的概念,建立了饱和器传热传质一维计算模型.通过数值模拟计算,分析了K对饱和器性能的影响,并确定了K设计值的取值范围.结果表明:饱和器出口水温、出口气温和出口空气含湿量受K设计值影响明显,K设计值越大,出口气温和出口空气含湿量越高,出口水温则越低;K设计值取得太小,水温和水膜温度相差较大,计算出的空气出口参数会偏小,反之,水膜温度几乎等于水温,计算出的空气出口参数会偏大,K设计值取15～100中的某一个值较为合理.
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| 关 键 词： | 饱和器 HAT循环 水膜热阻 K设计值 |
Influence of Water Film Thermal Resistance Correction Factor on Performance of Packing Saturators |
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| YI Zhi-yin
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SONG Hua-fen.Influence of Water Film Thermal Resistance Correction Factor on Performance of Packing Saturators[J].Power Engineering,2011,31(6). |
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| Authors: | YI Zhi-yin SONG Hua-fen |
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| Affiliation: | YI Zhi-yin,SONG Hua-fen(Turbomachinery Institute,Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | Based on single-film theory,the process of heat and mass transfer in packing saturator between water and air was studied,while the concept of water film thermal resistance correction factor(K) proposed,and a one-dimensional mathematical model built up.Through numerical calculation,influence of the correction factor on performance of the saturator was analyzed,after which the value range of K was determined.Results show that the K value obviously affects the outlet air temperature,outlet water temperature an... |
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| Keywords: | saturator HAT circulation water film thermal resistance K design value |
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