Low temperature applications of geothermal energy use

Pahud, Daniel and Generelli, Milton and Kaehr, Paolo and Salvadori, Dario and Bernasconi, Angelo (2004) Low temperature applications of geothermal energy use. In: Energie- und Umweltforschung im Bauwesen Schweizerisches Status-Seminar 2004, 9-10 September 2004, ETH, Zurich.

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Three research projects dealing with low temperature applications of geothermal energy use are presented. A heating and cooling system coupled to a large number of vertical borehole heat exchangers is analysed by calibrated numerical system simulations. Simple design guidelines are formulated. The feasibility study of a spa at Bodio has demonstrated that half of its thermal energy requirement can be covered by geothermal energy from the transalpine tunnel water. The resulting energy index of the spa is low. The last project, still in progress, deals with the redaction of a guide for the design, construction and operation of heating and cooling systems using energy geostructures. The guide will be published in the series of the SIA documentations.

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