TY - JFULL AU - Gulshan Sachdeva and Vaibhav Jain and S. S. Kachhwaha PY - 2014/4/ TI - Performance Study of Cascade Refrigeration System Using Alternative Refrigerants T2 - International Journal of Mechanical and Mechatronics Engineering SP - 521 EP - 528 VL - 8 SN - 1307-6892 UR - https://publications.waset.org/pdf/9997619 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 87, 2014 N2 - Cascade refrigeration systems employ series of single stage vapor compression units which are thermally coupled with evaporator/condenser cascades. Different refrigerants are used in each of the circuit depending on the optimum characteristics shown by the refrigerant for a particular application. In the present research study, a steady state thermodynamic model is developed which simulates the working of an actual cascade system. The model provides COP and all other system parameters e.g. total compressor work, temperature, pressure, enthalpy and entropy at different state points. The working fluid in low temperature circuit (LTC) is CO2 (R744) while Ammonia (R717), Propane (R290), Propylene (R1270), R404A and R12 are the refrigerants in high temperature circuit (HTC). The performance curves of Ammonia, Propane, Propylene, and R404A are compared with R12 to find its nearest substitute. Results show that Ammonia is the best substitute of R12. ER -