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 (κ) 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 ofκ was determined. Results show that the κ value obviously affects the outlet air temperature, outlet water temperature and outlet air humidity ratio; with the rise of κ, both the outlet air temperature and air humidity ratio increase, and the outlet water temperature drops. If κ is too small, the values of water temperature and water film temperature would differ a lot, and the calculated outlet air parameters would be smaller than actual values, whereas if κ is too big, the result would be opposite. A reasonable κ value should be some value between 15 and 100.%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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