EFFECT OF FLASH GAS BYPASS ON PERFORMANCE OF VCR SYSTEM

D.D. Bhoge, A.M.Patil

Abstract: In this paper performance of vapor compression refrigeration system (VCRS) with R134a in direct expansion (DX) mode and flash gas bypass (FGB) mode are compared. The performance of system can be improved in FGB mode. When system is operated at same operating conditions, in DX and FGB mode, then it is observed that COP increases from 2% to 7% in FGB mode and cooling effect at low load is 2% to 16% more. Discharge temp in case of FGB mode is less than DX mode. Also pressure drop across evaporator is less in FGB mode. In DX mode vapor does not participate in cooling effect but it will create pressure drop across evaporator and because of it compressor work increases. In FGB mode vapors are bypassed because of it less pressure drop is created across evaporator and less compressor work

Keywords: Flash gas bypass, direct expansion and VCRS etc…

DOI: https://doi.org/10.15623/ijret.2014.0306019