Development of a low-noise 10-K J-T refrigeration system. Technical progress report, 15 August 1986-15 February 1987

Technical Report · Sun Feb 15 00:00:00 EST 1987

OSTI ID:5569900

Little, W A

This report summarizes work on the development of a low-noise Joule-Thomson, microminiature refrigeration system, designed for 10 K operation. Two events since the last report have had an important influence on the confirmation through a series of experimental measurements of the remarkable cooling power at 80 to 90 K of the nitrogen-hydrocarbon gas mixtures discussed briefly in the previous report. These experiments confirmed that these mixtures could give a refrigeration an order of magnitude greater than that attainable with argon or nitrogen at the same input pressures. In addition, it was recognized that this high efficiency allowed one to use a heat exchanger of substantially smaller surface area and a compressor designed for operation at much lower pressures. This lower-pressure operation would greatly reduce the wear of the piston seals and thereby prolong the life of the system. It was also discovered in the course of these measurements that the use of the gas mixtures resulted in virtually clog-free operation of the refrigerators.

• Research Organization: MMR Technologies, Inc., Mountain View, CA (USA)
• OSTI ID: 5569900
• Report Number(s): AD-A-185258/1/XAB
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
JOULE-THOMSON EFFECT
REFRIGERATORS
DESIGN
BROMIDES
CARBON DIOXIDE
ENTHALPY
ENTROPY
HEAT EXCHANGERS
HYDROCARBONS
LOW PRESSURE
LOW TEMPERATURE
NITROGEN
PHASE DIAGRAMS
REFRIGERANTS
SCRUBBERS
BROMINE COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DIAGRAMS
ELEMENTS
EQUIPMENT
FLUIDS
HALIDES
HALOGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION CONTROL EQUIPMENT
THERMODYNAMIC PROPERTIES
WORKING FLUIDS
420201* - Engineering- Cryogenic Equipment & Devices