Experimental Study Of Fresh Air Liquid Dehumidification And Radiant Ceiling Air Conditioning System In Typical Climate

Fresh air liquor dehumidification and radiant ceiling air-conditioning system isone kind of independent temperature and humidity control air-conditioning system.Load is divided into sensible heat load and latent heat load, so the system can avoidthe humidity control ability insufficiency effectively and reheat loss caused byovercooling in the traditional air conditioning systems, enhance air-conditioningsystem’s energy efficiency and the thermal comfort of indoor environment.According to climatic characteristics of Guangzhou area, a measurement andanalysis is resented in this paper about air-conditioning system’s actual running statein typical climate.Guangzhou is a typical hot summer and warm winter area, including hightemperature and high humidity, low temperature and high humidity, low temperatureand low humidity typical climates according to outdoor meteorological data. Thehigh humidity feature makes a higher demand of air conditioning system’sdehumidification capacity and continuous operation under various conditions. Bycalculating air conditioning system’s dehumidification mass and EER, analyzingtheir changing curve and influence factors, the author analyzed the performance ofliquid desiccant air conditioning unit. According to air conditioning roomtemperature field, velocity field, humidity field, PMV-PPD and ADPI（Air DiffusionPerformance Index）, the thermal comfort of the indoor environment and airconditioning system’s operating effect is determined.Experimental results show that, the author found that the EER is relatively highat half supply air volume. At the same station, fresh air unit’s dehumidificationcapacity and cooling capacity are proportional to supply air volume and thechanging curves is similar to outdoor air moisture content. The EER of Fresh AirUnit is the highest in high temperature and high humidity climate, lowest in lowtemperature and high humidity climate. Every index of thermal comfort and effectfactors are within comfort standard, so air-conditioning room’s thermal comfort iswell.