Optimisation d’un stockage de chaleur en dalle active dans un immeuble d’habitation

Pahud, Daniel and Travaglini, Giorgio and Fromentin, Antoine (2000) Optimisation d’un stockage de chaleur en dalle active dans un immeuble d’habitation. Project Report. UNSPECIFIED.

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Abstract

Two multi-family buildings of 20 flats each are planned in a Lausanne suburb in Switzerland, with the objective of satisfying the Minergie standard. Heating at a very low temperature is planned with “active concrete plates”. They are plates in which pipes have been fixed for the circulation of a heat carrier fluid. It is a heat emitter with a very large heat capacity, which is used as heat storage for a solar heating system. The active solar heating potential is assessed when a solar collector field is directly connected to the active concrete plates of the building. A diffusive duct ground heat storage is then integrated in the system without an additional water buffer store for seasonal heat storage purposes. The system’s concepts are assessed and the system’s thermal performance quantified. The results of this study are summarised in order to be able to size a pre-project. The TRNSYS system simulation programme is used to make a calculation tool of the system including the building, the active concrete plates, the collector field and the diffusive heat storage when used in the system. A system control strategy is defined with the help of system simulations. A global heat balance is established. An optimal system size is found in relation to the solar fraction to be met. Simulations were also made to compare active concrete plate heating to floor heating, or solar absorbers without glazing to single glazed solar collectors.

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