Theoretical Analysis of Hybrid Chiller

The present work aims to find out the performance parameter of hybrid chiller (combination of vapour absorption cycle and vapour compression cycle) of 351.7 kW capacity for working temperature of 5°C as evaporating temperature and 40°C as condensing temperature. The investigation uses R22 and DMA as working pair where, R22 (chlorodifluoromethane) is a refrigerant and DMA (dimethylacetamide) is absorbent. The theoretical results show that, with the hybrid chiller system the electrical power consumption of vapour compression system is reduced and the coefficient of performance (COP) of vapour absorption system improves by almost 23.05% for same temperature limits and capacity as compared to independent operation of the cycle at same operating temperature and capacity. Also, in hybrid system absorber heat capacity, heat rejected in condenser and the heat supplied to generator is reduced as compared to independent operation of vapour absorption cycle.