IIR document

Global environmental consequences of introducing R-744 (CO2) mobile air conditioning.

Author(s) : HAFNER A., NEKSÅ P.


Life Cycle Climate Performance (LCCP) of mobile air-conditioning (MAC) systems is estimated for different locations in Asia, where the car marked is growing very fast. The test data from SAE AR CRP have reconfirmed that system energy efficiency is no argument against R-744. Fuel use of R-744 systems is significantly lower than with HFC-134a, even in the warm climates considered in the present comparison. Another benefit of R-744 is the potential for compact system design and the good properties R-744 offers for using the system as a heat pump in the reversed mode. R-744 systems represent a sustainable alternative for mobile AC systems, ready for an European implementation in the near future. LCCP results for hot locations in China and Indian indicate an energy saving potential related to the operation of the AC system by up to 12% by applying an R-744 system. The total GHG emission could be reduced by 40% (India) and 55% (China).

Available documents

Format PDF

Pages: 2006-2


  • Public price

    20 €

  • Member price*


* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).


  • Original title: Global environmental consequences of introducing R-744 (CO2) mobile air conditioning.
  • Record ID : 2007-1718
  • Languages: English
  • Subject: Environment, General information
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29


See other articles from the proceedings (111)
See the conference proceedings