The distributed-parameters model of heat transfer between the gases and working fluids in the generator was established in the absorption-compression hybrid refrigeration system powered respectively by the exhaust heat and power from engine

as well as the lumped-parameters in the other units.The steady characteristics of the hybrid refrigeration cycle were analyzed at the condition of cooling load being 30 kW.The research results show that the compression refrigeration supplies primarily the cooling load for the bus when the bus drives at idle and low speed; and the absorption refrigeration sub-cycle supplies mainly the cooling load for the bus when it is at middle and high speed.