EXERGY ANALYSIS OF A DOUBLE EFFECT PARALLEL FLOW CHILLER

Abstract

A 500 TR double effect parallel flow absorption chiller with H20-LiBr as refrigerantabsorbent is studied and the exergy destruction at each of its components is calculated. In the parallel-flow cycle, a whole weak solution is sent to high temp generator by passing through the low temperature generator. Such type of arrangement in the double effect system increases COP of the cycle as compared to single effect cycle. A simulation analysis of its exergy destruction at each component has been done with the help of EES. The results of simulation are used to study the influence of the various operating parameters such as generator, evaporator and condenser temperatures on the exergy destruction in absorber, condenser, evaporator, high temperature regenerator, low temperature regenerator, high temperature heat exchanger, low temperature heat exchanger, lower solution expansion valve, upper solution expansion valve, lower refrigerant expansion valve, upper refrigerant expansion valve and the overall system. The results can be useful in the design, control and the performance enhancement of these absorption chillers.