Christophe wrote:A simple thermal buffer with passive exchanger can be raised more interesting but we do not work on the same range of T ° ... so we need more stored volume ...
I think that the discussions of the first 30 pages spoke well of a scheme: recharging in summer (and when possible in winter) of buried storage via solar thermal collectors, and discharge in winter via a water / water heat pump allowing to record the temperature level to a value sufficient to ensure the heating of an existing house.
Pure passive (without PAC), I don't think it can take you very far in the winter. Of course, we can bring out the eternal "Drake landing" example. But the houses are "new" and "thermos" mode.
Edit: posts crossed with those of Lilian07.