The energy-saving effect of three different condensers for the evaporative condenser's refrigerating unit was introduced and compared.Taking R22 refrigeration cycle for example,the theoretical compressor power consumption cuts down by 2% to 3% theoretically while condensation temperature reduces 1℃.Cooling water flow of the evaporative condenser is less than water-cooled condenser's,this makes power consumption of circulating water pump saved.Taking indoor exhaust and condensed water for the evaporative con...