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Cryocooler
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A cryocooler is a refrigerator designed to reach cryogenic temperatures. The term is most often used for smaller systems, typically table-top size, with input powers less than about 20 kW. Some can ha
Fig.1 Schematic diagram of a Stirling cooler. The system has one piston at ambient temperature Ta and one piston at low temperature TL.
Fig.1 Schematic diagram of a Stirling cooler. The system has one piston at ambient temperature Ta and one piston at low temperature TL.
Fig.2 Four states in the Stirling cycle.
Fig.2 Four states in the Stirling cycle.
Fig.3 pV-diagram of the ideal Stirling cycle.
Fig.3 pV-diagram of the ideal Stirling cycle.
Fig.4 Schematic diagram of a split-pair Stirling refrigerator. The cooling power is supplied to the heat exchanger of the cold finger. Usually the hea
Fig.4 Schematic diagram of a split-pair Stirling refrigerator. The cooling power is supplied to the heat exchanger of the cold finger. Usually the heat flows are so small that there is no need for physical heat exchangers around the split pipe.
Cryogenics
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In physics, cryogenics is the production and behaviour of materials at very low temperatures.
Cryocooler
…A cryocooler is a refrigerator designed to reach cryogenic temperatures (below 120 K, -153 °C, -243.7 °F). The term is most often used for smaller systems, typically table-top size, with input powers less than…
Nitrogen is a liquid under −195.8 °C (77.3 K).
Nitrogen is a liquid under −195.8 °C (77.3 K).
This is a diagram of an infrared space telescope that needs a cold mirror and instruments. One instrument needs to be even colder, and it has a cryoco
This is a diagram of an infrared space telescope that needs a cold mirror and instruments. One instrument needs to be even colder, and it has a cryocooler. The instrument is in region 1 and its cryocooler is in region 3 in a warmer region of the spacecraft (see MIRI (Mid-Infrared Instrument) or James Webb Space Telescope).
A medium-sized dewar is being filled with liquid nitrogen by a larger cryogenic storage tank.
A medium-sized dewar is being filled with liquid nitrogen by a larger cryogenic storage tank.
Catalogue image of a cryogenic valve
Catalogue image of a cryogenic valve