CYCLE ANALYSIS OF AN AIR-COOLED LIBR H2O ABSORPTION HEAT-PUMP OF PARALLEL-FLOW TYPE/

A gas-fired absorption heat pump with cooling capacity of 2 RT was ana lysed as an air-conditioner for domestic use during the summer. The ab sorption heat pump considered was an air-cooled, double-effect, LiBr/H 2O system of parallel-flow type. The performance of the absorption hea t pump in the cooling mode of operation was investigated through cycle simulation to obtain the system characteristics depending on the inle t temperature of air to the absorber, the working solution concentrati ons, the solution distribution ratio of the mass of solution into the first generator to the total mass of solution from the absorber, and t he LTDs (leaving temperature differences) of the heat-exchanging compo nents. When the predicted results were compared with the measured data for similar design conditions, reasonable agreement was observed. The optimum design and operating conditions of an air-cooled absorption s ystem are suggested based on this cycle simulation analysis.