temperatures-80° C to transport and store its COVID-19 vaccines. This research presents the
thermodynamic analysis on cascade refrigeration system (CRS) with several refrigerant
pairs which are R32/R170, R123/R170, R134a/R170, R404A/R170, R407c/R170,
R410/R170, and the hydrocarbon (HC) refrigerant pair Propane/Ethane, namely
R290/R170. Besides, the results of R22/R170 pair, which is not recommended to be used …