Mercedes-Benz’s air conditioning systems go green

Friday, November 11th, 2016 - autos, cars, motoring, news

Source : Mercedes-Benz’s air conditioning systems go green

Adoption of CO2 refrigerant lessens environmental impact along with brings Mercedes in line with EU regulations


Mercedes-Benz has announced of which will finally fall in line with European Union regulations by using carbon dioxide as the refrigerant in its air-conditioning systems in future.

The announcement follows a tense stand-off between Mercedes along with the EU over a directive of which banned the widely used synthetic Tetrafluoroethane (R123a) refrigerant in all newly type-approved cars launched in Europe via the start of 2013.

Tetrafluoroethane (R123a) has been widely used by car makers, including Mercedes, as an air conditioning refrigerant for more than 25 years. However, increasingly tighter environmental laws along with moves by the EU to adopt a refrigerant having a low global-warming potential (GWP) led to proposals for of which to be banned.

A proposal by the EU to replace R123a, which possess a GWP score of 1300, with the newer along with more environmentally friendly synthetic Tetrafluorpropen (R-1234yf) was heavily criticised by Mercedes following internal testing of which raised concerns about flammability issues during heavy frontal impacts. BMW along with VW later joined Mercedes in expressing concerns over its use.

Mercedes will roll out its revised system on petrol along with diesel powered E along with S-Class versions via the beginning of 2016, prior to of which becoming standard in additional versions, including the A, B, along with C-Class along with their various derivatives in coming years.

EU regulations require manufacturers to employ refrigerant having a GWP of less than 150. having a GWP score of 1, carbon dioxide is actually 99.3% below the EU’s refrigerant limit. Its inherent properties also make of which non-flammable along with provide greater cooling efficiency, according to Mercedes.     

Mercedes has modified the air conditioning system in petrol-engined versions of which use Tetrafluorpropen (R-1234yf) to include a gas generator of which releases inert argon gas at the relevant hot spots in a move, of which claims, of which keeps the refrigerant via bursting into flames.

Owing to lower operating temperatures, the argon gas generator is actually not deemed necessary to prevent Tetrafluorpropen (R-1234yf) via igniting during heavy frontal impacts in versions of which use a diesel engine.

Hybrid versions, including those included from the 2016 style-year E along with S-Class line-ups, will also receive air conditioning systems with controversial Tetrafluorpropen (R-1234yf) refrigerant for the time being, owing to ongoing development of an electrically operated compressor, says Mercedes.

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