Changes in freezing temperature, energy consumption, exergy loss and efficiency, and cooling coefficient of R22 and R404a refrigerants over experimental time

Abstract

This article is to study the working efficiency of air freezing systems using R22 and R404a refrigerants. The main objective is to determine the loss, exergy efficiency and cooling coefficient (COP) of the freezing refrigeration system using R22 and R404a refrigerants. Theoretically, find the law of change in freezing time, energy consumption for the freezing refrigeration system using R22 and R404a refrigerants, machine running at without load (do not leave ingredients in the freezer when the air temperature in the freezer reaches -45oC), with load (when the product core temperature reaches -18oC) by direct and indirect fluid supply methods and find appropriate fluid supply methods for the system's R22 and R404a of refrigerants two-level compression freezer, at the same time analyze exergy and find the suitable freezing mode for the refrigeration system in freezing conditions at temperatures from -30oC to -45oC, wind speed of 6 m/s.