2. Property comparison between R410A and R32
Table 1 shows basic properties’ comparison of R410A and R32.
R410A is a refrigerant mixture of R32 and R125 with 50/50 wt. %, and R32 is a pure fluid. The molecular weight of R32 is 28% lower than that of R410A. Critical pressure and temperature of R32 are 850 kPa and 6.0 K respectively higher than those of R410A. Both R410A and R32 have very similar boiling point. As discussed before, the main environmental benefit of R32 over R410A is due to the fact that R32 has a much lower GWP of 675, compared to R410A with a GWP of 2088 (IPCC, 2007).
Table 2 shows properties of R410A and R32 in typical condensing and evaporating conditions for air-conditioning application (Tu et al., 2011).