As the R-AC-HP sector accelerates the transition to low-GWP refrigerants, the challenge remains to identify safe, efficient, and regulatory-compliant alternatives that can be deployed across a wide range of applications.

While R-290 is increasingly favored for its ultra-low GWP, its A3 flammability classification significantly limits its use in certain residential and commercial settings due to safety concerns and building code restrictions.
This study focuses on R-474A, a newly developed ultra-low GWP, A2L-classified refrigerant, as a complementary solution to R-290, particularly in applications where safety or regulatory constraints make the use of hydrocarbons impractical or prohibited. Following promising computational modelling and system-level performance simulations ...