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摘 要 ：对覆有亲水层的开缝翅片管换热器在析湿工况下空气侧换热和压降特性进行了试验研究，分析了入口空气相对湿度对空气侧特性的影响，以努塞尔数Nu和阻力系数f来反映空气侧换热和压降特性。实验结果表明，析湿工况下，努塞尔数Nu随入口空气相对湿度的提高而增大，而阻力系数f变化不明显；换热器水侧中心温度越低，入口空气相对湿度对努塞尔数Nu的影响越显著；干工况下，入口相对湿度对空气侧显热换热系数几乎没有影响。 关键词： 开缝翅片 试验研究 析湿工况 入口空气相对湿度 空气侧特性 Analysis of Airside Performance of Slit Fin-tube Heat Exchangers Guo Yibo Du Zhimin Chen Ping He Keqing Jin Xinqiao School of mechanical engineering, Shanghai Jiao Tong University, Shanghai 200240, China Abstract: The airside heat transfer and pressure drop characteristics of slit fin-tube heat exchangers with hydrophilic coating were studied under dehumidifying conditions experimentally. The effect of inlet air relative humidity on airside characteristics was investigated. Results show that heat transfer was enhanced with the rise of inlet relative humidity, while the pressure drop characteristic was insensitive to the change of inlet relative humidity. With the decrease of waterside temperature, the effect of inlet air relative humidity on heat transfer becomes more significant. The inlet air relative humidity scarcely affects the sensible heat transfer coefficient under dry condition. Keywords : slit fin; experimental study; dehumidifying conditions; inlet air relative humidity; characteristics of airside