Daimler renounces R-1234yf


 

25 Sept  – In an unexpected move that has stunned the industry, Daimler AG, maker of Mercedes-Benz and other vehicles, announced today that it will not use refrigerant 1234yf. Their press release said:

 

Daimler has provided relevant authorities with the findings of an investigation which raises questions on the safe usage of the new internationally recognised R1234yf refrigerant. Up to now, the climate-friendly chemical was set to be used worldwide in the automotive industry and was previously perceived to be safe. This was determined by numerous laboratory and crash tests carried out by international vehicle manufacturers and independent institutions.

Despite multiple confirmations of non-critical results, Daimler carried out a series of additional tests on the new refrigerant as part of a new real-life test scenario developed in-house which goes above and beyond the legally prescribed requirements.

In the new real-life test scenario, the refrigerant is dynamically dispersed at high pressure near to hot components of the test vehicle’s exhaust system. This corresponds to a serious head-on collision in which the refrigerant line is severed and the reproducible results demonstrate that refrigerant which is otherwise difficult to ignite under laboratory conditions can indeed prove to be flammable in a hot engine compartment. Similar tests of the current R134a refrigerant did not result in ignition.

Due to the new findings of this study and the high safety demands at Mercedes-Benz, this chemical will not be used in its products. The company therefore wishes to continue to use the proven and safe R134a refrigerant in its vehicles.

Daimler has already informed the relevant authorities of these facts and will also make the results of this investigation available to all relevant associations as well as to other vehicle manufacturers.

It is much too soon to assess the ramifications of this decision; some are already saying it marks the end of the chemical as a replacement refrigerant because other makers will follow Daimler’s lead. Others wonder how this will square with the EU requirement to use low-GWP refrigerants in all new cars.

Advertisements

About macsworldwide

Mobile Air Conditioning Society (MACS) Worldwide Founded in 1981, MACS is the leading non-profit trade association for the mobile air conditioning, heating and engine cooling system segment of the automotive aftermarket. Since 1991, MACS has assisted more than 600,000 technicians to comply with the 1990 U.S. EPA Clean Air Act requirements for certification in refrigerant recovery and recycling to protect the environment. The Mobile Air Conditioning Society (MACS) Worldwide’s mission is clear and focused--as the recognized global authority on mobile air conditioning and heat transfer industry issues. www.macsw.org
This entry was posted in #1234yf, Automotive, Mobile Air Conditioning and tagged , , , , . Bookmark the permalink.

2 Responses to Daimler renounces R-1234yf

  1. James B. says:

    Very very interesting. Hopefully R-134A is here to Stay!

  2. Bill Clark says:

    Daimler is serious about this. They are recalling the vehicles they’ve already sold and converting them to R134A
    http://www-odi.nhtsa.dot.gov/acms/cs/jaxrs/download/doc/UCM427965/RCAK-12V478-8051.PDF

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s