The difference between refrigerant R404A and R507

The difference between refrigerant R404A and R507

Refrigerant is also called refrigeration working fluid, which is the blood of refrigeration system. It is called refrigerant, refrigerant or Freon in many places. It is a working substance that continuously circulates in the refrigeration system and realizes refrigeration through its own state changes. The refrigerant absorbs the heat of the cooling medium (water or air, etc.) in the evaporator to vaporize, and transfers the heat to the surrounding air or water in the condenser to condense.

　　 Application of refrigerant R404A and environmental test equipment: suitable for high and low temperature test chambers, constant temperature and humidity test chambers, thermal shock test chambers and other equipment with low temperature refrigeration systems.

1. Refrigerant R404A is compounded by 44%/52%4% of R125/R143a/R134a, and R507 is compounded by 50%/50% of R125/R143a. From the composition of the mixed ingredients Look at the three components of R404A and the two components of R507. The ODP of the two refrigerants is 0 and neither destroys the ozone layer.

2. The pressure of R404A and R507, the data on the temperature and pressure gauge shows that the pressure between the two is almost the same and will not cause any impact on the system. If you usually pay attention to the system accessories used, especially the label on the expansion valve The description is shared by R404A and R507.

　　3. R404A is a non-azeotropic mixture, liquid filling must be used when filling, and R507 is an azeotropic mixture.

　　4. The presence of R134a in R404A increases the mass transfer resistance and reduces the heat coefficient of the transfer chamber, while the heat transfer coefficient of R507 is higher than that of R404A.

　　 5. Judging from the current manufacturer’s use results, the effect of R507 is indeed faster than that of R404A.

　　6. ​​From the comparison of cost performance, R507 is 30-40% higher than R404A.

7. The performance of R404A and R507A are relatively close. The compressor power consumption of R404A is 2.86% higher than that of R507A; the discharge temperature of low-pressure compressor is 0.58% higher than that of R507A, and the discharge temperature of high-pressure compressor is 2.65% higher than that of R507A; COP ratio R507A is 0.01 higher; the intermediate temperature is 6.14% lower than R507A.