Arctic Foundations, Inc. - Flat-Loop Thermoprobes

Oak Ridge, TN - Cryogenic Barrier Demo Project

2006-45 Deadhorse, AK - Hangar Facility

1980-35 Aurora, AK - Tower

2005-51-3 Unalakleet, AK - Bulk Fuel Upgrade

1997-14 Bethel, AK - Army Aviation Ops Facility

2007-37 Arctic Village, AK - K-12 School

Russia Far East - Kubaka Gold Mine

2005-61-1 Kwigillingok, AK - Washeteria

Field assembly

Probe Farm

2006-14-2 Nunam Iqua, AK - K-12 School

Fusion-bond epoxy application

2003-13 Fairbanks, AK - UAF Geist Rd Entrance

2005-39-1 Denali, AK - Canyon Lodge WW Trtmt Plant

2003-37 Gakona, AK - HAARP Antenna Site

2004-32-1 Prudhoe Bay, AK

2006-14-1 Nunam Iqua, AK - K-12 School

1990-15 Gakona, AK - OTH-B Power Plant

1989-15 Gakona, AK - Tower

2005-39-3 Denali, AK - Canyon Lodge WW Trtmt Plant

Flat-Loop Thermoprobes

Flat-loop Thermoprobe evaporators being installed beneath a slab-on-grade shop building. The vertical white pipes are the thermosyphon risers. The condensers will be installed on the risers after building is constructed.

Thermoprobes with flat-loop evaporators utilize proprietary internal components within the riser to force the working fluid to travel in one direction within the evaporator. As the working fluid absorbs heat, it vaporizes and expands. The expansion helps to push the working fluid around the loop. The working fluid moves around the loop in two-phase flow, increasing in velocity as it proceeds around the loop. This allows the loop to be placed on a 'relatively' flat plane. The term 'relatively' means that there can be some undulations in the vertical profile of the loop. Typical designs allow for as much as six inches (150mm) amplitude in the undulations with no detrimental effects on the system. The subgrade can be graded to a near flat condition and the loops then placed directly on the graded material. Typically the level of the loops is approximately 1.5 feet to 3 feet (0.5m to 1.0m) below the base of the subgrade insulation. Loop lengths of 500 feet (150m) are not uncommon.