The refrigerant R134a (tetrafluoroethane) is non-combustible, non-toxic and colorless. R134a has a global warming potential ( GWP ) of more than 1 (GWP = 1430). R134a has an ODP (Ozone Depletion Potential) value of 0. It is suitable for industrial standard refrigeration systems with positive displacement compressors and direct evaporation. It is classified in safety class A1 according to ISO / ASHRAE . R134a is a single-substance refrigerant without Glide. It can be filled in liquid and gaseous form in a refrigeration system. With its GWP value of more than 150, R134a complies with F-gas Regulation 517/2014. That's it in the F-gas regulationaffected phase-down scenario. This already affects the price of the refrigerant. By limiting the annual quotas, the prices of R134a in purchasing are increasing significantly.
Alternatives must come!
The automotive industry is facing tough !. Automotive air conditioning systems were operated with the refrigerant R134a. Since the beginning of 2017, only low-GWP refrigerants may be used in new cars. R134a may not be used anymore.
What happens to existing car air conditioners?
Due to the rising purchase prices and lack of availability of the refrigerant must be an alternative. One option would be the more environmentally friendly R1234yf with a GWP value of 4. This refrigerant is classified in ISO / ASHRAE safety class A2L . It is highly inflammable and forms hydrofluoric acid (hydrofluoric acid) on combustion.
However, it is not possible to simply replace them with an existing car air conditioner that has been operated with R134a. On the one hand, the service connections on the refrigerant piping from one R134a system to one R1234yf system are different. On the other hand, the problem lies in the type approval of the vehicle. If another refrigerant is added to the car air conditioner, its type approval will expire.
According to current legislation (mid-2018), there is still no solution for existing car air conditioning systems with the refrigerant R134a.
- Commercial standard refrigeration systems
- industrial climate conditioning
- vehicle air conditioning
- Mobile air conditioners (car, bus, train)
- domestic appliances
- Heat pumps
- Gastronomy (eg condensing units)
- Cold stores and warehouses
- ready to plug in devices
- composite systems
- Single plants
- Cold rooms, preparation rooms etc.
- small hermetic systems
- Direct expansion
- new plants