two-phase thermosyphon
Link: http://w3id.org/permafrost/v/ipaglossary/t0384
Within: IPA Permafrost Glossary
Definition: A passive heat transfer device, filled with a temperature-dependent liquid/vapour combination, installed to remove heat from the ground (see Figure 24).
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two-phase thermosyphon
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| Comment |
A two-phase thermosyphon consists of a sealed tube with a small radiator above the ground surface, containing a working fluid that can be in either the liquid or vapour phase, depending on its temperature. These devices have no moving parts, and they require no external power for operation. When the air temperature falls below the ground temperature, the vapour condenses in the radiator section of the tube, the pressure in the tube is reduced and the liquid in the lower section starts to boil. The resulting cycle of boiling, vapour movement up the tube, condensation, and return of the condensate by gravity flow is an effective way of transferring heat up the tube, thus cooling the ground.
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| dcterms:source |
https://doi.org/10.4224/20386561
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