Comparative Study of Improvements in Multiple Effect Vapor Absorption Systems using Loop Heat Pipes

Abstract

The research work is based on the research done on the modification of vapor absorption refrigeration systems (VARS) by incorporating Loop Heat Pipes (LHP). A comparison of the performance enhancements of different effect systems namely single, double, half and triple effect systems is performed in this research work. The modification in the systems is brought in by replacing the condenser of the VARS systems by LHPs. It's shown through the simulations that intra cycle heat exchange increases with the change in design, materials of the LHP and operating temperatures. The COP I and COP II are maximum for triple effect system whereas the percentage increase in the performance is highest in double effect system 78% & 28%. Higher the generator temperature, higher is the heat utilization factor for the LHPs. The system becomes concise and flexible at the same time.