Abstract:

In this paper, a performance test of the air-conditioning system based on evaporative condenser is carried out. The results show that the coefficient of performance (COP) of the system is up to about 3. 5 even if the system runs in an ambient with high relative humidity; that the wet bulb temperature of air greatly influences the heat-emission capacity of evaporative condenser; and that, when other parameters keep constant, the heat emission decreases by about 5% per 1 ℃ increase in wet bulb temperatue.The performances of the evaporative condenser and the airconditioning system in variable working conditions are also investigated. Test results indicate that, although the COP of the system and the energy-to-efficiency ratio (EER) of 出e evaporative condenser decrease with tlIe cooling load , in the driving of induced fan with variable frequency , the COP still increases by 5%. Moreover , the comparison between the evaporative condenser and the air-cooling condenser demonstrates tlIat the air-conditioning system based on evaporative condenser is feasible in the area with hot summer and warm winter.

Key words: evaporative condenser, air conditioning, coefficient of performance (COP), wet bulb temperature