SIMULATION OF THERMODYNAMIC ANALYSIS OF CASCADE REFRIGERATION SYSTEM WITH ALTERNATIVE REFRIGERANTS

The main aim of this project is to analyses the cascade refrigeration system by employing various alternative refrigerant pairs and choosing the best pair for higher temperature circuit (HTC) and lower temperature circuit (LTC). The analysis w as done in various refrigerants pairs which are R134a/R23, R290/R23, R404A/R23, R407C/R23, R410A/R2 3, R134a/R508B, R290/R508B, R404A/R508B, R407C/R508B, R410A/R508B, R134a/R170, R290/R170, R404A/R170, R407C/R170 and R410A/R170. Assuming the degrees of sub cooling and superheating as 5°C and 10°C, respectively. The condenser temperature in hi gher temperature circuit (HTC) was varied from 30°C to 50°C and evaporator temperature in lower t emperature circuit (LTC) was varied from -70 to -50°C. The intermediate heat exchanger temperature is about -20°C.