Abstract: As a new heat and mass transfer device，heat-source tower plays an important role in the heat-source tower heat pump system.Heat is absorbed from the ambient in winter and supplied to the evaporator of heat pump.There are some similarities and differences in heat and mass transfer between heat-source tower and cooling tower.Six primary differences are pointed out as follows：heat resistance，physical property of liquid，ratio of latent heat percentage，flow rate of circular water/liquid，effect of liquid float on the whole system，and direction and rate of heat transfer.Based on the similarities and differences of heat-source tower and cooling tower，the mathematical model of heat and mass transfer in the cross heat-source tower is proposed and the model is confirmed by experiments.Results show that the latent heat percentage of cross flow heat-source tower is less than 35% and the error of heat transfer rate between simulation and experiment is less than 10%.The model is accurate enough to simulate the heat transfer characteristic in the heat-source tower.

Key words: heat-source tower, heat transfer, mass transfer, simulation, model verification

摘要： 热源塔作为新型的热质交换设备，在热源塔热泵机组运行过程中起着重要作用。其在冬季运行时从空气中吸收热量，为热泵机组提供低品位热量。热源塔与冷却塔在传热传质上存在一定异同点，指出了冷却塔与热源塔在传热传质上存在热阻、液体物性、潜热换热量比例、循环水/液体流量、飘液对系统的影响、热量传递方向和换热量大小等方面的差异。根据热源塔与冷却塔差异建立叉流热源塔传热传质数学模型，并采用实验验证模型的准确性。结果表明叉流热源塔潜热百分比低于35%，模型结果与实验结果相比换热性能误差低于10%，该模型能够较为精确地对叉流热源塔换热性能进行模拟。

关键词: 热源塔, 传热, 传质, 模拟, 实验验证