A NUMERICAL INVESTIGATION OF THERMODYNAMIC PERFORMANCE OF CASCADE REFRIGERATION SYSTEM OPERATED BY DIFFERENT REFRIGERANT PAIRS

Due to increasing , global pollution in terms of air, water & soil, scientific community concentrating on development of new alternative refrigerants which are safe for nature & eco friendly. Many researchers of around the world have made part of accomplishments in the substitution of refrigerants, looking for the refrigerant option in low temperature circuit and high temperature circuit of cascade system with zero ODP & low GWP value. That is the reason I consider refrigerants in my research work with zero ozone depletion potential and low global warming potential. Natural refrigerants should be preferred for selecting refrigerants in cascade refrigeration system due to its environment friendly nature. Successful design of cascade vapour refrigeration system mainly depends upon the selection of refrigerants for both temperature circuits: high temperature circuit &low temperature circuit. The goal of my research work is to analyze two distinctive cascade vapour refrigeration system utilizing two refrigerant sets R41/R290 and R41/R600. Performances of cascade vapour refrigeration system using R41/R290 refrigerant pair & R41/R600 refrigerant pair are analyzed thermodynamically. A mathematical model used for this purpose.EES (ENGINEERING EQUATION SOLVER) software is used for mathematical modeling. Performances of cascade vapour refrigeration system in terms of COP, XTOTAL, WTOTAL & ηEx analyzed under various operating conditions like TEVA, TCON & TCASLTC .Result shows that the Coefficient of performance (COP) of refrigerant pair R41/R600 used in cascade vapour refrigeration system is higher compared to R41/R290 refrigerant pair operated at same working conditions.