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Performance Comparison of Fin-Tube Type Evaporator using R134a and R1234yf under the Frost Condition
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 Title & Authors
Performance Comparison of Fin-Tube Type Evaporator using R134a and R1234yf under the Frost Condition
Shin, Yunchan; Kim, Jinhyun; Cho, Honghuyn;
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The low temperature distribution of the refrigerated and frozen food has been increased gradually. Refrigeration industry is using R134a refrigerant, which GWP is 1300. R1234yf is an alternative refrigerant of R134a because GWP of R1234yf refrigerant is just 4. Evaporator used in refrigeration truck refrigeration system is operated on low temperature condition. Accordingly, evaporator is formed frost and the formation of frost is rapidly decreased performance of evaporator. In this study, the performance of evaporator using R134a and R1234yf refrigerant was analyzed with operating conditions under frost condition. As a result, the performance of R134a evaporator according to air inlet temperature, relative humidity and evaporating temperature was more sensitive than R1234yf evaporator. Besides, the frost growth of R134a evaporator is steeper than that of R1234yf one.
Evaporator;Frost thickness;Refrigeration capacity ratio;R134a;R1234yf;
 Cited by
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