Heat transfer in an air thermosyphon permafrost protection device

Journal Article · Wed Sep 01 04:00:00 EDT 1982 · J. Energy Resour. Technol.; (United States)

DOI:https://doi.org/10.1115/1.3230404· OSTI ID:6274745

Evans, A L; Reid, R L

Velocity and temperature profiles were measured in a prototype air thermosyphon permafrost protection device. This device, known as the air convection pile, consists of an 18-in. (0.46-m) outer tube containing a shorter concentric 10-in. (0.25-m) tube extending from 10 to 60 ft (3 to 18 m) into the permafrost. Measurements showed a low frequency oscillating flow in both the annulus and inner tube. Heat removal rates compared favorable with an analytical model and previous experimental results, but the annulus velocity profiles were significantly different, possibly due to the oscillation in the flow.

• Research Organization: Mechanical and Aerospace Engineering Dept., The Univ. of Tennessee, Knoxville, TN 37916
• OSTI ID: 6274745
• Journal Information: J. Energy Resour. Technol.; (United States), Journal Name: J. Energy Resour. Technol.; (United States) Vol. 104:3; ISSN JERTD
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
AIR FLOW
CALCULATION METHODS
CONVECTION
ENERGY TRANSFER
EQUIPMENT PROTECTION DEVICES
FLOW RATE
FLUID FLOW
FOUNDATIONS
GAS FLOW
HEAT TRANSFER
MASS TRANSFER
MECHANICAL STRUCTURES
OSCILLATIONS
PERMAFROST
SUPPORTS
TEMPERATURE MEASUREMENT
THERMODYNAMICS
THERMOSYPHON EFFECT
TUBES