Performance Enhancement Analysis of Double Effect Vapor Absorption System Using Loop Heat Pipes

Abstract

A high temperature heat source cannot be used efficiently for a single effect vapor absorption refrigeration system (VARS). For the utilization of such high temperature source a double effect system can be brought into action. The COP I and COP II of a double effect VARS are generally higher than that of the single effect system. This research work implements some major modifications with the use of a Loop Heat Pipe (LHP) in the design of the double effect VARS to attain an enhanced performance. The simulations have found that the improved COP I and COP II are 2.09 and 0.4571 respectively. Also the percentage increase on the modified system has been recorded as 75.82% and 28.2 % respectively. Simulations also found that the average T C can be maintained at 104.2ºC. The increase in the performance characteristics shows a positive gradient with the increase in the temperature of operation of LHP.