Low Capacity Reliquefier for Storage of Cryogenic Fluids.
Final rept. Dec 89-Apr 93,
GENERAL PNEUMATICS CORP SCOTTSDALE AZ WESTERN RESEARCH CENTER
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The subject SBlR Phase II project addresses the tasks of generating cryocooling at 10 K and of reliquefying helium at a rate of 10 liters of liquid per day. The system designed is a combination of a four-stage Stirling cryocooler, a three-stage compressor, an anti-clogging Joule-Thomson cryostat, and a special drive mechanism which minimizes piston side forces and seal wear. A major task of the project was derivation of a multi-stage Stirling simulation computer program. The project resulted in the successful design, fabrication, and initial testing of a 10 K multi-stage Stirling cryocooler. The cryocooler employs an oil lubricated drive mechanism and rubbing piston seals to allow testing over the very low speeds necessary to reach 10 K, and a bolted structure to facilitate trouble-shooting and modification. As such, the machine is a versatile testbed for advancing multi-stage Stirling analysis, design, and regenerators technology, leading to higher efficiency, faster, smaller machines employing high reliability non-wearing drive mechanisms and seals. jg p.4
- Inorganic Chemistry
- Physical Chemistry
- Fluid Mechanics