Experimental Performance Evaluation of R134a And Its Low GWP Hydrocarbon Alternatives in Domestic Refrigerator

According to Montreal Protocol it was decided to initiate the worldwide phase out of CFCs and HCFCs. Moreover in Kyoto Protocol even new developed HFCs refrigerants like R-134a should be gradually phased out due to their high global warming potentials (1430).The present work is to Explore performance evaluation of most promising drop-in replacements of R134a in domestic refrigerator with Zero ODP and low GWP refrigerants. The assessed refrigerants are R290, R600a, R430A, R436A.Basic cycle and performance comparison of all alternative refrigerants have been calculated for standard rating cycle, most commonly used condensing and evaporating temperatures 550C and -250C respectively. By performing the experiment we are come to know that the Charging amount is reduced by 59.25 and 55.5% for R290 and R600a respectively. COP of the domestic refrigerator working with R290 is improved by up to 2.09%, and compressor power is reduced by 2.06%. COP of the domestic refrigerator working with R600a is lower by up to 5.05%, and compressor power is increased by 5.29%. Pull down time for the R134a, R290, R600a are observed as 120, 104, and 109 min respectively. ON TIME ratio is reduced for R290 by 10.31% and for R600a it is increased by 6.89%. TEWI for R290 and R600a is reduced by 10.72% and 4% respectively.