PERFORMANCE OF DIFFERENT WORKING FLUIDS IN TRANSFER-TANK OPERATED VAPOR ABSORPTION-REFRIGERATION SYSTEMS

A vapour absorption refrigeration system (VARS) in which a transfer ta nk replaces the conventional solution pump is analysed. Six fluid pair s with R22 as the refrigerant and different absorbents: DMA; DMF; DMET EG; DMETrEG; DMEDEG; and NMP are considered, Variations in COP, circul ation ratio, percent mass of generated vapour utilised for transfer-ta nk operation, and minimum generator temperature are compared over a wi de range of operating conditions. In general, R22-DMA, R22-DMF, and R2 2-DMETrEG are preferable for a transfer-tank operated VARS. At high ge nerator temperatures or low condenser temperatures, R22-DMA gives the best overall performance. When the temperatures of the evaporator, abs orber, and condenser are high, one may prefer R22-DMF as the working f luid.