Correlative comparison between environmentally friendly R407c refrigerant and R22 refrigerant

R407c is a mixture of R32 refrigerant and R125/refrigerant plus R134a refrigerant in a certain ratio. Compared with R22 refrigerant, it is an environmentally friendly refrigerant that does not destroy the ozone layer. It is also an HFC refrigerant used to replace R22 refrigerant. Although the performance of R407C refrigerant and R22 refrigerant are very familiar, there are still many differences between R407C refrigerant and R22 refrigerant. Let us understand the difference between R407C refrigerant and R22 refrigerant together.

1, R407C is a mixed refrigerant, and R22 is a single refrigerant.

2, R407C does not destroy the ozone layer and is an environmentally friendly refrigerant; R22 refrigerant is very harmful to the ozone layer, and it is gradually being prepared for replacement.

3, R407C has an evaporation pressure very close to R22, but the condensation pressure is slightly higher than the value of R22.

4. Studies have shown that the relative thermal conductivity of R407C is 83% of R22 during evaporation; the relative thermal conductivity of R407C is 85% of R22 during condensation.

5. Due to the influence of thermal conductivity, evaporation temperature and condensation temperature under the same pressure, the heat exchange capacity of R407C system is worse than R22 for the same heat exchange area. To achieve the same capacity and COP must The area of u200bu200bthe large heat exchanger (about 10%).

6. Some data and test results show that the charge of R-407C refrigerant is 90%-95% of that of R22 refrigerant.

7. Generally speaking, the suction pressure of R407C refrigerant is lower than that of R22 refrigerant.

8. The discharge pressure of R407C refrigerant is higher than that of R22 refrigerant.

9. The COP value of R-407C refrigerant is lower than that of R2 refrigerant.

10. The corresponding temperature under the same pressure.

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