Characteristics of Cryogenic Air

Cryogenic Rescue Alternative Supply System (mine rescue chamber) Air Handler Box under test.

• Density (at STP): 54.7lbs/ft3 or 1.93lbs/liter
• Boiling Point (at STP): -318ºF or -194 C or 79K
  
• Stored in dewar (insulated tank) at low pressure
• Stored for long periods using Zero-Loss storage technology
• Typical liquid expansion ratio to gas = 728:1
• Create liquid air at any mixture (oxygen/nitrogen) by:
  – Mixing liquid oxygen and nitrogen
  – Supercooling filtered, dry atmospheric air
• Can convert liquid air to supercritical (gaseous) air by moderate pressure increase. Density remains 54 lbs/ft3.