基于理想除湿效率的液体除湿空调系统性能影响因素分析

Analysis of Influencing Factors on Performance of the L.D.A.C. System Based on the Concept of Ideal Dehumidification Efficiency

以质量守恒、能量守恒定律为基础,提出液体除湿空调系统理想除湿效率的概念.建立数学模型并结合已有实验研究,对空气和盐溶液的质量流量、入口温度及入口含湿量、入口浓度等因素与系统溶液除湿性能之间的关系进行了分析.结果表明:虽然单一增大溶液质量流量或减小空气质量流量都可以增大系统液气比,但这两种情况中系统除湿效率的增长规律是不同的;在不同液气比下,理想除湿效率均随空气含湿量的增大呈现出先增大后减小的规律;液气比越大,理想除湿效率变化转折点所对应的空气含湿量越大;除湿效率将随溶液入口浓度增大而增大,而空气入口温度及溶液入口温度对除湿效率无显著影响.文中结果校正或拓展了已有的研究结果,并更加精细、合理.

A new concept called ＂ideal dehumidification efficiency＂ was proposed to evaluate the perform ance of the liquid dehumidification system based on the laws of conversation of mass and conversation of energy. The effects of mass flow rate, inlet temperature and inlet quality concentration/humidity of both humid air and lithium chloride solution were analyzed in detail. It was found that although the increase in solution mass flow rate or decrease in air mass flow rate can increase the dehumidification efficiency, the regularities were different. The relationships between dehumidification efficiency and air inlet humidity were also studied at five different liquid-air ratios. Compared to the existing research, the results obtained in this paper were much more reasonable and precise.