In the current global decarbonization energy background of"carbon peaking"and"carbon neutrality",it will become especially important to optimize engineering technology to promote energy conservation.This paper mainly studies the performance of composite cooling technology of air-cooled multi-connected outdoor unit additional spray cooling system.The effective scope of the nozzle in the composite cooling flow field is analyzed based on the numerical simulation software(FLUENT),and then the optimal composite cooling model is matched,and finally the profitability of the composite cooling technology under the high temperature external environment(>43℃)is verified by experiments.It is concluded that this technology has a significant energy-saving effect,which can effectively reduce the power consumption of multi-connection and external units,and the power consumption can be reduced by up to 10%;The overall refrigeration coefficient EER of the composite cooling system under partial load is better than that of the air-cooled type,and the energy efficiency ratio(SEER)of refrigeration season is greatly improved,which is increased by 7.7%;The inlet dry bulb temperature of the condenser drops by 7~9℃ to ensure that the unit can still operate at full load under high temperature external environmental conditions.
energy savingcomposite coolingnumerical simulationexternal environment with high temperatureseasonal energy efficiency ratio