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热源塔热泵系统由于其可实现高效制冷制热,无结霜问题,且不受地理条件限制,受到了越来越多的关注。热源塔作为热泵系统冬季取热的核心部件,对系统整体性能有着重要影响。本文构建了以乙二醇溶液为循环工质的横流热源塔实验系统,研究了空气流量、温度、含湿量及溶液流量、温度、浓度对传热传质系数的影响规律,并拟合出了关联式,结果显示传热传质系数主要受空气流量密度及淋液密度的影响,Le数在0.91~1.12之间变化。
Heat source tower heat pump system because of its efficient cooling and heating, no frost problems, and is not subject to geographical constraints, by more and more attention. The heat source tower, as the core component of the heat pump system in winter, has an important influence on the overall system performance. In this paper, an experimental system of cross-flow heat source tower with ethylene glycol as the circulating medium was constructed. The influence of air flow rate, temperature, moisture content, solution flow rate, temperature and concentration on heat and mass transfer coefficient was studied. The results show that the heat and mass transfer coefficients are mainly affected by the air flow density and the leaching density, and the Le number varies from 0.91 to 1.12.