Energy Piles are equipped with individual or several pipe circuits to enable exchange of heat with the surrounding soil. Geothermal energy is the second most abundant source of heat on earth, after solar energy, as is found stored in the earth. There are two functions of Energy Piles. The first consists of transferring load from construction into the bearing layer, and the second is the exchange of heat with the soil. Energy piles are installed either using soil displacement techniques or soil excavation systems. With increasing energy costs and the introduction of greater renewable energy requirements for new buildings, Energy Piles are becoming more and more in demand.
”Design and performance of energy pile foundations” – Industrial Ph.D. project
On the 10th of September 2018, an industrial Ph.D. enlightening the long-term feasibility and performance of energy piles was presented by Centrum Pile employee Maria Alberdi-Pagola in Denmark. The Ph.D. thesis named “Design and performance of energy pile foundations” had a duration of 3 years and was carried out as a collaboration between Centrum Pile, Aalborg University and VIA University College with Innovations fonden and INSERO Horsens as financial partners.
The Ph.D. thesis resulted in hitherto unknown knowledge regarding the forecasting process when seeking to install energy piles, the main outcome of the project being the development of a tool which estimates the optimal amount of energy piles needed to obtain maximum performance.
Furthermore, the tool eliminates the risk of depleting the ground heat by stimulating the long-term effect of energy piles in any specific area, thus granting a basis upon which to decide how to alter the dimensions of the energy piles to accommodate the heating and cooling demands of any building. In effect all of this means that Aarsleff Ground Engineering utilises the latest knowledge and expertise available regarding the technology and installation of energy piles.
At Aarsleff Ground Engineering the aim is likewise to seek other ways to apply the experience gained through the studies in new and innovative solutions. As such, another energy pile study is already underway in Denmark in the shape of an EUDP-supported project in the south of Denmark as a broad collaboration between Centrum Pile and VIA University College among other respected partners. The scope of the EUDP project is to prove the feasibility of energy piles as a complete standalone district heating and cooling grid in a new sustainable urban area, Ny Rosborg, in Vejle.