Energy saving and emission reduction technologies for vehicles have been paid more attention in recent years

and it is necessary to investigate how to efficiently recover and utilize the waste heat from vehicle engines to drive automotive air conditioning system. Based on that

a full air-cooled bubble absorption refrigeration test system with 3 kW cooling capacity driven by waste heat

using R124-DMAC as working fluids was designed and built. In the system

engine exhaust gas was simulated by heated air. Operating parameters were tested through changing heat source temperature

chilled water temperature and pump flow rate. The maximum COP of the system could reach 0.54 under the condition of generator temperature 100℃ and evaporating temperature -4℃. Heat source and chilled water temperatures had an important effect on cooling capacity and COP

and this system had good stability. However when evaporating temperature was below 5℃

a rectification unit should be considered in order to improve cooling effects. Additionally

this experiment proved that the air-cooled bubble absorber worked well

providing theoretical support for the refrigeration system driven by waste heat in vehicle air conditioning.