Paper No 124 – 1 Study on a combined absorption heat pump system driven by low temperature heat source – 13th IEA Heat Pump Conference, Jeju, Korea
In this study, type 1 and type 2 combined absorption heat pump system using R32/DMAC is developed for heating and cooling applications. Waste heat from the heat with low temperature (below 90?) is utilized as the heat source. R32 and an organic fluid of DMAC(Dimethylacetamide) are used as refrigerant and absorbent, respectively. Additionally, the combined heat pump system has two splitters placed after the generator outlet and condenser outlet. Cooling, heating and system coefficient of performance (COP) are calculated according to the change of generator temperature. The maximum cooling COP is estimated as 0.400, the maximum heating COPs with and without superheat are 0.196 and 0.161, respectively. Maximum system COP is estimated as 0.596. It is found that the heating performance of the system is more sensitive to the generator temperature than the cooling performance.