Study & Design On Liquid Desiccant Air Conditioning System For Civil Building Energy Saving

Domestic and foreign scholars have paid more and more attention to liquid desiccant air conditioning system in recent years. Treating air with solution can dehumidify air at a high temperature avoiding producing condensate water, which increases air quality. What's more, desiccantsolution can be regenerated with various kinds of low level energy. In a liquid desiccant air conditioning system, humidity and temperature can be controlled individually,which has great advantages comparing with traditional air conditioning system.Several common desiccant solutions have been compared and diagrammatic and programming methods to calculate lithium chloride solution has been provided in this paper. The heat and mass transfer device which is suitable for dehumidification and regeneration has been analyzed in structure and working in theory. Through assuming efficiency of heat and mass transfer device,mathematical model for lithium chloride solution dehumidification and regeneration has been established and computer program has been made to analyze its working performance. As a dehumidifier, the paper has analyzed: how ratio airsolution ratio of influence on dehumidifying process and how to choose it; the relation between Supplement of concentrated solution and capacity of dehumidification; he relation between of cold energy provided by cooling source and cold energy air get. As a regenerator, the paper has analyzed: how temperature and concentration of regenerating solution influence on the capacity and efficiency of regenerator, and how to choose ratio airsolution ratio. In the end, the paper provided several kinds of liquid desiccant air conditioning system, which use multistage dehumidification and regeneration and has a high efficiency.