Abstract: After the Kigali Amendment was passed in 2016, 185 countries joined and officially came into effect. The bill requires Article 5 countries to freeze the baseline of HFCs from 2023 to 2025 and begin reducing HFCs from 2026. As R32 dominates the household air conditioning market, low GWP R290 and HFOs are the main choices for reducing HFC emissions. However, due to the harm of PFAS to the environment and human health, a global ban on PFAS is being pushed forward, including some HFOs refrigerants such as R1234yf/ze, R1233zd, etc. Therefore, to meet the dual demands of GWP and PFAS, R290 is currently one of the main choices for refrigerant substitution. R290 has natural advantages and disadvantages in the field of household air conditioning. Based on the physical differences between R290 and R32, proposes the main impact of R290 replacing R32 on the system and compressor, and designs a new R290 compressor for 1.5 HP AC under this guidance.

Key words: R290, R32, Compressor