Helium Liquefier Development (HeLD)

Presolicitation Notice – Synopsis

NASA Glenn Research Center/GRC has a requirement for the purchase of liquefiers/refrigerators to support space propulsion and cryogenic research and development activities.

• The helium liquefier/refrigerator system must:
  • Implement gas-bearing helium turbo-expanders that have a variable brake design and are located in the cold box at a temperature level below the liquid nitrogen assisted pre-cooling.  Variable brake must allow for an output power reduction to approximately 30% of the maximum, while maintaining high efficiency. No more than three turbines are to be used. 
  • Be capable of a .... Read More