MATHEMATICAL MODELLING AND ANALYSIS OF DOMESTIC REFRIGERATOR WITH ALTERNATIVE ECO-FRIENDLY REFRIGERANTS FOR R134a

This work represents the mathematical modelling of low GWP refrigerant mixtures to replace R134a in domestic refrigeration system. The refrigerants like R290, R600a, R134a and mixtures of R290, R600a and R152a are considered for the performance evaluation in the refrigeration system. The refrigerants such as R134a, R290+R600a (50%+50%), R290+R600a+R134a (47.5%+47.5%+5%), R290+R600a+R134a (45%+45%+10%), R152a, R290+R600a+R152a (47.5%+ 47.5%+5%), R290+R600a+R152a (45%+45%+10%) are named as R1, R2, R3, R4, R5, R6, and R7. The various performance measures like volumetric efficiency, mass flow rate, volumetric cooling capacity (VCC), condenser heat rejection, refrigeration effect, compressor work, coefficient of performance (COP) are calculated under various condensing and evaporating temperatures. The result shows that the refrigerant R6 provides the better performance in terms of the mass flow rate and compressor work are arrived 55.73% and 14.3% less than of R1 and R5. For the above parameters, the refrigerant R6 could be a better alternate for R134a.