REVIEW OF CASCADE REFRIGERATION SYSTEM WITH DIFFERENT REFRIGERANT PAIRS

A Comparative assessment of a cascade refrigeration cycle with different refrigerant pair is presented in this paper. R744 is used in Low-temper ature (LT) cycle whereas R134a,R290,R717 and R404A (R125(44%)/R143a(52%) /R134a(4%)) are use d in the High-temperature (HT) cycle. The effects of the thermodynamic parameters on the cascade system are evaluated with an objective to find the best working fluid pair based on COP. R 744-717 is selected based on thermodynamic and environmental performance. A parametric evaluation is also presented for R744-R717 working pair by varying parameters like sub cooling,superheatin g,evaporating,condensing temperature and temperature difference in the cascade condenser of the system. https://www.ijiert.org/paper-details?paper_id=14021