与热泵结合的预冷型溶液除湿空调系统性能研究

提出一种与热泵结合的预冷型溶液除湿空调系统,利用室内回风作为再生空气、热泵冷凝热预热再生空气和再生溶液、冷冻水预冷除湿前溶液.建立了与实验数据具有良好吻合度的系统整体数学模型,模拟研究了系统再生侧热泵冷凝热分配比φ、再生空气回风比R_hf以及除湿侧冷冻水入口温度t_w,in的变化对系统性能的影响. 结果表明,随着φ的增加,系统的再生能力、除湿能力与性能系数均会下降. 随着R_hf增加,系统的除湿量和系统性能系数分别上升了30.95%和20.07%. 当t_w,in升高时,再生侧的调节能抑制系统除湿能力的进一步下降. 研究结果为溶液除湿空调系统的优化提供思路.

Study on the Performance of Precooled Liquid Desiccant DehumidificationAir Conditioning System Combined with Heat Pump

A precooled solution dehumidification air conditioning system combined with a heat pump is proposed. The indoor return air is used as the regenerated air,the condensing heat pump is used to preheat the regenerated air and the regenerated solution,and the chilled water is used as the pre-cooled dehumidification solution. An overall mathematical model of the system is established,which is in good agreement with the experimental data. The effects of the cooling heat distribution ratio φ of the heat pump in the regeneration side,the return air ratio R_hf of the regenerated air and the inlet temperature t_w,in of the chilled water in the dehumidification side on the system performance are simulated and studied. The results show that the regeneration capacity,dehumidification capacity and performance coefficient of the system decrease with the increase of φ. With the increase of R_hf,the dehumidification capacity and the system performance coefficient increase by 30.95% and 20.07%,respectively. When t_w,in increases,the regulation on the regeneration side can inhibit the further decline of the dehumidification capacity. The research results provide ideas for the optimization of solution dehumidification air conditioning system.