R744 air conditioning system

Since January 1, 2017, all newly registered vehicles in the European Union are required to use a refrigerant with a GWP (Global Warming Potential) below 150. GWP is a (relative) measure of the influence of a substance on global warming. In addition to chemical solutions, the natural R744 (carbon dioxide) with a GWP of 1 offers itself as an alternative to the previously used refrigerants. The world’s first environmentally friendly R744 air conditioning system was developed for a premium German manufacturer in MAHLE’s development departments in Stuttgart. Since the early 1990s, MAHLE has already been working with the environmentally friendly refrigerant. This expertise has made a substantial contribution toward finding solutions to our customers’ high requirements for comfort as well as the technical challenges of an R744 system in very short development times. This is because R744 places high technical demands both on the components and the overall system, such as the significantly higher pressures of up to 130 bar, compared with current refrigerants. In the meantime, we are delivering the air conditioning unit and the evaporator in series.