Helium Refrigeration and Liquefaction Using a Liquid Hydrogen Refrigerator for Precooling
Abstract
Consideration is given to the use of a hydrogen refrigerator to assist in the production of temperatures below those obtained with hydrogen. A hydrogen refrigerator is used to maintain a precooling evaporator at or near 21 deg K in a helium gas circuit. The helium circuit may be arranged to produce liquid for external use or to produce refrigeration between 21 deg K and 4. 2 deg K in a closed system. Charts have been developed that show the requirements of the composite helium - hydrogen system and the effect of heat exchanger performance. The relative quantities of refrigeration (hydrogen and helium) at various temperature levels have been determined.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 27, 1960
- Accession Number
- ADA286683
Entities
People
- B. W. Birmingham
- D. B. Mann
- D. B. Shelton
- J. W. Dean
- T. R. Strobridge
Organizations
- National Institute of Standards and Technology