Investigation of VCRs System with Heat Exchanger Using R-600a and Phase Change Material

Abstract

Refrigeration forms the basic essence of living comfort, so it is very necessary to update the technologies in refrigeration system. The COP of the refrigeration system (VCRS) can be increased by increasing the refrigeration effect or by reducing the work done by the compressor. In this work the COP is improved by achieving sub cooling using a heat exchanger which helps in increasing the refrigerating effect. Capillary tube of refrigeration system is wound around the evaporator outlet to make a heat exchanger there by increasing the COP of the system by the effect of sub-cooling. The additional advantage added to this project is use of eco friendly refrigerant R-600a and the phase change material (ethylene glycol) we are reducing the emission of CFCS(chloro - fluoro carbons).The VCRS system with and without heat exchanger was analysed using refrigerants R-134a and R-600a and the deviation in COP was carefully studied. By using the PCM (phase change material) in the evaporator the time for which the desired refrigerating effect that can be maintained is experimentally investigated.