Active and Passive: Can we Use the Same Storage ? A Case Study

Fromentin, Antoine and Hadorn, Jean-Christophe and Sujevs, Dimitri and Pahud, Daniel and Sarlos, Gérard (1997) Active and Passive: Can we Use the Same Storage ? A Case Study. In: NorthSun'97 7th International Conference on Solar Energy in High Latitudes, 9-11 June 1997, Espoo, Finland.

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The original feature of a prefabricated solar house, which has been analysed with the help of a dynamic simulation programme (TRNSYS 14.1), is to use the massive concrete internal walls both as a radiative element and a heat storage capacity. Heat distribution pipes embedded in the core of the walls can thus make the active solar system more simple. It has been demonstrated in a previous study that the increase of the solar collector surface leads to a non-linear growth of the solar fraction which tends toward an upper limit; this limit depends on the total wall's mass. In this study, we show that a 14 cm thick wall is optimal; a thicker wall does not bring any further auxiliary energy consumption reduction. Moreover, it seems that it is not useful to embed the pipes more than 8 to 10 cm inside the wall. There is thus effectively an optimal wall configuration for such a concept.

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