CREEM2024

CREEM 2024 - XXX Congresso Nacional de Estudantes de Engenharia Mecânica

AVALIAÇÃO DO DESEMPENHO DOS REFRIGERANTES R290 E R600A COMO SUBSTITUTOS DO R134A EM SISTEMAS DE REFRIGERAÇÃO DE PEQUENA CAPACIDADE

Submission Author: Fernanda Irigon Lima , MG , Brazil
Co-Authors: Fernanda Irigon Lima, Leandro Alves, Maria Eduarda Teodoro Dantas, Mateus Viana Silva, Arthur Figueira , Guilherme Oliveira
Presenter: Fernanda Irigon Lima

doi://10.26678/ABCM.CREEM2024.CRE2024-0140

 

Abstract

This paper focuses on the performance of the R290 and R600a refrigerants used to replace the hydrofluorocarbon (HFC) R134a in a small capacity refrigeration application. The original system provides a nominal refrigeration capacity of 0.25 kW. The substitution of R134a with the alternative fluid (R290) represented a direct operation; there were no changes in the basic components of the cycle during the tests. The tests were conducted using a water evaporator, at a controlled temperature of 9°C, in steady state condition and for three different levels of modulation of the expansion valve (EEV), thus enabling a complete thermodynamic analysis. The use of the hydrocarbon, which has a low global warming potential (GWP) and zero ozone-depleting potential (ODP), ensured an acceptable operation of the refrigeration system with a refrigeration capacity higher than the original system with R134a. Finally, the use of the R290 refrigerant resulted in the maximum EER values, averaging 1.44, compared to the original system with R134a, which had an average of 1.2, indicating that this hydrocarbon has potential to replace R134a in some applications.

Keywords

Refrigeration, R290, R134a, R600a, Drop-in, GWP

 

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