The Comparisons of Refrigerants R410A, R32 and R290

1. The charging amount of R32 is less, only 0.71 times that of R410A. The working pressure of the R32 system is higher than that of the R410A, but the maximum increase does not exceed 2.6%, which is equivalent to the pressure requirements of the R410A system. At the same time, the exhaust temperature of the R32 system is up to 35.3°C higher than that of the R410A.

2. The ODP value (Ozone Depleting Potential) is 0, but the GWP value (Global Warming Potential) of R32 refrigerant is moderate, and the CO2 emission reduction ratio can reach 77.6% compared with R22, while R410A is only 2.5%. Significantly better than R410A refrigerant in CO2 emission reduction.

3. Both R32 and R410A refrigerants are non-toxic, while R32 is flammable. However, among several substitutes of R22, R32, R290, R161, and R1234YF, R32 has the highest flammable lower limit LFL (lower ignition limit), which is relatively non-flammable but is still a flammable and explosive refrigerant. There have been many accidents over the years, and the performance of the R410A is more stable.

4. In terms of theoretical cycle performance, the cooling capacity of the R32 system is 12.6% higher than that of the R410A, the power consumption is increased by 8.1%, and the comprehensive energy saving is 4.3%. The experimental results also show that the energy efficiency ratio of the refrigeration system using R32 is slightly higher than that of R410A.