Etude pilote pour les bâtiments du centre SUVA Lucerne. Analyse des réponses de 2 sondes tests et optimisation du stockage diffusif

Pahud, Daniel (1999) Etude pilote pour les bâtiments du centre SUVA Lucerne. Analyse des réponses de 2 sondes tests et optimisation du stockage diffusif. Project Report. UNSPECIFIED.

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Abstract

A diffusive ground heat storage will be integrated in the energy concept of the new SUVA buildings at Gisikon, Luzern, The task is to size the storage as part of a whole heating and cooling system. It requires the knowledge of the time-evolution of the heating and cooling demand for a typical year, as well as the thermal properties of the ground and the borehole heat exchangers that will form the ground heat exchanger of the heat storage. The heating and cooling requirements were simulated with a building simulation programme and two response tests were realised on two borehole heat exchangers to determine in situ the main thermal parameters of the ground and borehole heat exchangers. The boreholes will be reused in the actual storage. The measurements confirm that no significant ground water flow is present. The PILESIM programme is used to assess three system concepts by numerical simulations. PILESIM is a thermal simulation tool of heating and cooling systems which use heat exchanger piles or borehole heat exchangers. The evaluations of the three system concepts permit the optimisation of the diffusive ground heat storage as part of the thermal system. They also helped to propose recommendations for the selection of the best system concept.

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