IIR document

An improved CO2 cooling system for the up-armored HMMWV.

Author(s) : MANZIONE J., COLLIER S., MEMORY S., et al.


The US Army has conducted a second-generation design, fabrication, and test of a transcritical carbon dioxide cooling system on the M1114 up-armored High Mobility Multi-Purpose Wheeled Vehicle (HMMWV). The HMMWV cooling system is designed to cool military personnel and electronics equipment in hot ambient climates with rated conditions of 51.7°C outdoor ambient temperature. Carbon dioxide was selected as an alternate refrigerant because of its high potential for reduced logistics burden, cool-down performance, space and weight reductions, and environmental responsibility. During 2005-6, the US Army, in collaboration with Modine and the University of Illinois, has conducted breadboard testing, full-scale prototype fabrication, instrumented laboratory tests, and proving ground operational testing. This paper summarizes those development and testing results.

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: An improved CO2 cooling system for the up-armored HMMWV.
  • Record ID : 2007-1721
  • Languages: English
  • 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