Refrigerating performance of air-source heat pump water chiller-heater module units with water spray system

In high ambient temperature conditions, the refrigerating performance and operating reliability of air-source heat pump water chiller-heater module unit decay with the temperature rising. To increase its refrigerating performance and operating reliability, develops a prototype with water spray system, and carries out some experiments. The results show that the refrigerating output increases by 31%, COP increases by 63%, and the exhaust pressure decreases by 20% with the water spray system opened when the ambient temperature is 35 to 43 ℃.