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Accession Number ADA595037
Title Review of Thermosyphon Applications.
Publication Date Feb 2014
Media Count 46p
Personal Author A. M. Wagner
Abstract Thermosyphons have been used for stabilizing permafrost since 1960. The original thermopile was designed as a vertical unit with one end buried in the ground and the other end exposed to the air. More recently, flat, loop, and buried thermosyphons have been developed. Thermosyphons consist of a pipe or series of pipes that are installed with one part below ground (evaporator) and the other exposed to the air (condenser). They are filled with a pressurized fluid that evaporates because of the heat of the soil and rises as a vapor to the condenser. If the air temperature is lower than that of the soil, the vapor will condense on the inside walls of the pipe and release the transported heat from the ground to the air. The condensate then returns to the evaporator by gravity. When the air temperature is higher than that of the soil, the heat transfer ceases and the unit is dormant. Presented here is a general overview of applications of thermosyphons in cold regions.
Keywords Artificial frozen barriers
Atmospheric temperature
Buried thermosyphons
Flat loop thermosyphons
Flat thermosyphons
Flexible thermosyphons
Foundation stability
Hairpin thermosyphons
Heat transfer
Hybrid systems
Sloped thermosyphons
Vertical thermosyphons

Source Agency Non Paid ADAS
NTIS Subject Category 89B - Architectural Design & Environmental Engineering
41 - Manufacturing Technology
46 - Physics
Corporate Author Engineering Research and Development Center, Hanover, NH. Cold Regions Research and Engineering Lab.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1415
Contract Number N/A

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