Car AC Refrigerants Face Third Major Overhaul
New research accelerates the automotive industry's search for eco-friendly cooling solutions.
1Environmental Impact of AC Refrigerants
The environmental effects of automotive AC refrigerants have long been debated. R-12 gas used in the 1930s was banned in the 1990s for ozone depletion. Its replacement R-134a faced EU bans in 2017 due to global warming potential. New studies now show current alternative R-1234yf may be more harmful than expected. This revelation is pushing automakers to explore new solutions, marking a potential third major shift in refrigerant technology.
2PFAS Danger and Health Risks
R-1234yf refrigerant breaks down into trifluoroacetic acid (TFA) in the atmosphere. TFA belongs to the PFAS group known as 'forever chemicals'. Research links TFA to liver diseases and fetal developmental disorders, with persistence in nature for thousands of years. A 2026 study revealed R-1234yf produces 3.6-10.3 times more TFA than its predecessor R-134a, raising urgent environmental concerns.
3Volkswagen's CO2 Solution
Volkswagen Group is transitioning some models to R-744 (CO2-based refrigerant). While CO2's cooling properties were known since the 1990s, high pressure requirements discouraged adoption. In EVs, CO2's superior heat transfer in cold weather actually increases range by up to 15%. This benefit outweighs the challenges of high-pressure systems, making it viable for next-gen vehicles.
4Propane Alternative: R-290
R-290 (propane) emerges as another contender with low global warming potential. Despite flammability concerns, it's less polluting than current refrigerants. IDTechEx reports predict surging demand for both CO2 and propane systems in coming years. European regulations are particularly driving this shift, with manufacturers developing dual-path strategies to meet varying regional requirements.
5Historical Turning Points
1930s: First commercial refrigerants introduced. 1990: Ozone-harming R-12 banned, replaced by R-134a. 2017: EU banned R-134a due to climate impact. 2020s: R-1234yf's TFA production discovered. 2026: New research confirms R-1234yf risks. Each transition required billions in R&D and production changes, reshaping supply chains. The automotive industry's environmental progress can be measured through these refrigerant revolutions.
6EV-Specific Challenges
AC systems directly impact EV range, with traditional refrigerants reducing battery performance. CO2 systems offer up to 15% range increase in cold climates. However, high-pressure components add weight and cost, creating new engineering hurdles. Thermal management becomes crucial in EV design, forcing collaborations between chemical suppliers and automakers. This transition may redefine automotive HVAC system architectures.
7Regulatory Pressure Mounts
The EU's 2017 R-134a ban caused global industry shifts. Now EPA and other agencies evaluate similar restrictions for R-1234yf. California leads PFAS regulations in the US, with new rules expected by 2028-2030. This regulatory uncertainty forces manufacturers to invest in multiple alternatives simultaneously. The coming decade may see fragmented regional standards, complicating global vehicle platforms.
8Industry's Sustainable Future
This third major refrigerant transition represents a critical sustainability effort for automakers. Each shift historically required $2-3 billion in R&D investments. Experts predict CO2 and propane systems will capture 60% market share by 2030. The transformation extends beyond automotive, affecting appliances and industrial cooling. This systemic change underscores the auto industry's complex environmental balancing act between performance, safety and sustainability.
Original article: SlashGear — Araç Klimalarında Üçüncü Soğutucu Değişimi Kapıda