Cascade Joule-Thomson refrigerators
The design criteria for cascade Joule-Thomson refrigerators for cooling in the temperature range from 300 K to 4.2 K were studied. The systems considered use three or four refrigeration stages with various working gases to achieve the low temperatures. Each stage results in cooling to a progressively lower temperature and provides cooling at intermediate temperatures to remove the substantial amount of parasitic heat load encountered in a typical dewar. With careful dewar design considerable cooling can be achieved with moderate gas flows. For many applications, e.g., in the cooling of sensitive sensors, the fact that the refrigerator contains no moving parts and may be remotely located from the gas source is of considerable advantage. A small compressor suitable for providing the gas flows required was constructed.
- Research Organization:
- Jet Propulsion Lab., Pasadena, CA (USA)
- OSTI ID:
- 6610980
- Report Number(s):
- N-84-15354
- Resource Relation:
- Other Information: In Refrig. for Cryogenic Sensors, 419-425, see N--84-15327 06-31
- Country of Publication:
- United States
- Language:
- English
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