Geo structures
Detailed information

 

 

Energy stakes

Detailaufnahme der Energiepfahl-armierung auf der Baustelle des Dock Midfield, Flughafen Zürich.Reinforced concrete stakes have mostly a diameter between 0.4 and 1.5 m and a length starting with some meters to over 30m. According to the stake diameter inside usually a double or a quadruple U pipe or a pipeline made of polyethylene are brought in. These pipes are surrounded completely with concrete, in order to manufacture a good thermal contact to the underground. In the closed cycle between the pipings in the stakes and the heat pump, a heat transfer liquid circulates to withdraw warmth or cold from the underground. With this energy system, either all or only one part of the foundation-stakes can be equipped.

This simple and appropriate technology produces no excessive extra costs, but must be implemented into the project planning of construction and energy concept from the beginning. Recently there are more than 350 installations of energetic geo- structures in Austria and in Germany, whose installed achievements are of some 10 KW for small buildings, up to 1 ' 000 KW for large industrial buildings.