The utilizability of non-flammable R471A with low-GWP in air-conditioning systems

Abstract

<p class="15">The utilizability of non-flammable refrigerant R471A with low-GWP is theoretically investigated in an air-conditioning system. In this context, R410A, R32, and R471A are compared for the evaporation temperatures of 4, 8 and 12 ℃ with the condenser temperatures of 40 and 50 ℃. The results indicate that both the mass flow rate and power consumption of R471A are higher compared to R410A and R32. Although COP of R471A is determined to be smaller than R410A and R32 about by 19% and 22%, R471A can satisfy the restrictions for air-conditioning systems due to its considerable low-GWP compared to R410A and R32 (GWP of R471A is lower by 78% and 93% in comparison with R32 and R410A, respectively). Hence, it should be possible to suppress global warming through the reduction of carbon emissions as a result of using R471A in these systems<span style="font-family: 'Times New Roman';">.</span> Additionally, since R471A is non-flammable, it can be safely used for systems requiring a high amount of refrigerant charge without violating the restrictions.</p>