Absorption Refrigeration Cycle for Automotive Air Conditioning

抄録

Experimental absorption refrigeration equipment with a generator driven by waste heat was manufactured and tested, with 2,2,2-trifluoroethane/1-methylpyrrolidine as the working-fluid pair. A plate generator was used to reduce the amount of solution in the equipment and to decrease the start-up time. However, the flow paths of the plate generator were not large enough to separate the refrigerant vapor from the two-phase flow. Therefore, a gas–liquid separator was introduced and a cooling coil as a partial condenser was embedded in the separator to cool the refrigerant vapor, which contained some absorbent, and condense the absorbent, and thus increase the concentration of the refrigerant vapor. The separator separated the refrigerant from the solution at lower solution flow rates, but at higher flow rates, the refrigerant vapor was accompanied by liquid droplets that flowed out of the vapor outlet. The cooling rate of the partial condenser was varied from 143 to 222 W by changing the flow rate of the cooling water, decreasing the refrigerant vapor temperature.