What is the difference between R404A refrigerant and R507?

1, R507 and R404A can replace R502 environmental protection refrigerant, but R507 can usually reach a lower temperature than R404a, suitable for low and medium temperature new commercial refrigeration equipment (supermarket freezer, cold storage, display cabinet, transportation), ice making equipment, transportation refrigeration equipment, Marine refrigeration equipment or renewal equipment. Suitable for all environments in which the R502 operates normally.

2, R404A and R507 pressure temperature gauge data show that the pressure between the two is almost the same, if you usually pay attention to the system accessories, you will find that the thermal expansion valve on the mark is shared by R404A and R507.

3, R404A is a non-azeotropic mixture, liquid charging is used when filling, and R507 is an azeotropic mixture. The presence of R134a in R404A increases the mass transfer resistance and reduces the thermal coefficient of the transmission chamber, while the heat transfer coefficient of R507 is higher than that of R404A.

4, from the current use of manufacturers, the effect of R507 is indeed faster than the cooling rate of R404A. In addition, the performance of R404A and R507 is relatively close, R404A compressor power consumption is 2.86% higher than R507, low pressure compressor exhaust temperature is 0.58% higher than R507, high pressure compressor exhaust temperature is 2.65% higher than R507, COP is 0.01 higher than R507, the intermediate temperature is 6.14% lower than R507.

5, R507 is an azeotropic refrigerant, the slip temperature is lower than R404A. After multiple leak-charging, the composition change of R507 is smaller than that of R404A, and the volume cooling capacity of R507 is basically unchanged, while that of R404A is reduced by about 1.6%.

6. Using the same compressor, the cooling capacity of R507 is 7%-13% larger than that of R22, and the cooling capacity of R404A is 4%-10% larger than that of R22.

7. The heat transfer performance of R507 is better than that of R404A under conditions with or without lubricating oil.