Thermopiles


haarp.GIF
Thermopile supporting an antenna tower at the HAARP facility at Gakona, Alaska

Thermopiles are load bearing two-phase thermosyphons that are generally used to found structures where permafrost soils exist. Typical thermopile applications follow:

  • Installation at sites with a frost-susceptible active layer where heave and pile jacking are problems. Thermo-cycling reduces frost heave forces to negligible quantities.
  • Installation in marginal permafrost where pile creep rates are high. Thermo-cycling reduces soil temperatures and subsequently reduces creep rate.
  • Installation at sites with saline permafrost where allowable stresses are reduced due to substantial quantiies of unfrozen water in the soil matrix. Thermo-cycling freezes water near piles and pushes salts away. Also proven effective for moving glycol from a piling face.
  • Installation at sites where development has increased the heat load to the subgrade. Heat transfer rates of the Thermopiles need to be sized to balance or exceed heat load.

 

 

 

 

 

 

Parent Category: Technologies