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

Nguyễn Văn Hoàng ^*

Nha Trang College of Engineering Technology, Nha Trang 650000, Khanh Hoa, Vietnam.

 

International Journal of Science and Research Archive, 2024, 11(01), 040–048.

Article DOI: 10.30574/ijsra.2024.11.1.1114

DOI url: https://doi.org/10.30574/ijsra.2024.11.1.1114

Publication history: 

Received on 23 November 2023; revised on 31 December 2023; accepted on 02 January 2024

 

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 -45^oC), with load (when the product core temperature reaches -18^oC) 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 -30^oC to -45^oC, wind speed of 6 m/s.

 

Keywords: 

R22; R404a; Freezing temperature; Energy consumption; Exergy; Cooling coefficient

 

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Copyright information: 

Copyright © 2024 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0

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