Abstract
Aim: The article presents an analysis of the feasibility of R1234yf and R448A, two new low
GWP refrigerants, as alternatives to R404A in the refrigeration system of small high and lowtemperature
test equipment.
Methods: The physical properties of R448A and R404A are similar. Compared with R404A, the GWP
of R1234yf and R448A reduced by 99.9% and 67.7%, respectively. The analysis is based on an experimental
comparison of R404A with R448A and R1234yf, comparing the compressor discharge temperature,
COP, cooling capacity, and the cooling rate of three refrigeration systems at different ambient
temperatures.
Results: The experimental results show that the cooling capacity of R448A is better than R404A at a
higher condensing temperature.
Conclusion: When the charging volume is 230g, and the ambient temperature is 25°C, the COP of the
R448A system is increased by about 24.63% compared with the R404A system.
Keywords:
High and low temperature test equipment, humidity , refrigerant, COP, filling capacity, regenerator.
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