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建立了错流中空纤维膜液体除湿的二维传热、传质数学模型。引入热阻因子与湿阻因子来衡量溶液除湿过程中热湿传递的不可逆性。比较了不同空气-溶液流量比与空气-溶液进口状态的热阻、湿阻因子,得到空气-溶液流量比为1:1时,热湿传递的不可逆性较小。由于错流除湿器偏离平衡逆流传热传质形式,最小热阻、湿阻因子不在溶液进口状态等浓度线上,最小热阻在偏离等浓度线使得空气与溶液的温差更大的点,最小湿阻因子在偏离等浓度线使得空气与溶液的水蒸气分压差更大的点。
A two-dimensional heat and mass transfer mathematical model of cross-flow hollow fiber membrane liquid dehumidification was established. The thermal resistance factor and the moisture resistance factor are introduced to measure the irreversibility of heat and moisture transfer in solution dehumidification process. Comparing the thermal resistance and the moisture resistance factor of different air-solution flow ratio and air-solution inlet condition, the irreversibility of heat and moisture transfer is smaller when the air-solution flow ratio is 1: 1. As the cross-flow dehumidifier deviation from the balance of counter-current heat and mass transfer form, the minimum thermal resistance, wet resistance factor is not in the solution inlet concentration line, the minimum thermal resistance deviate from the concentration line makes the air and the solution temperature greater point, The damp-proof factor is at a point that deviates from the isoconcentration line such that the difference in partial pressure of water vapor between the air and the solution is greater.