Solar heat storage in sand bed under house slab? | GreenBuildingAdvisor.com
by Andrew on Aug.19, 2010, under heat
A great discussion and intriguing answers at green building advisor’s forum. Beats the daylights out of watching Sensationalized Hypocritical Information TV “News”…
Long term thermal storage has never yet panned out in practice.
You want to save all that extra solar energy from the summer and use it in the winter? Get a PV system and put it on the grid. Then pull it off the grid. The grid stores it for you, not in Btus or even kwhs, but in Dollars. Problem solved.
ANSWERED BY KEVIN DICKSON – Jul 12 10
6.
Kevin,
You’re exactly right. Although solar thermal systems collect more BTUs per dollar invested than PV systems, they yield less useful energy on a year-round basis — much less in winter, when thermal heat is needed.
The simple fact of the matter is that solar thermal systems collect too much heat during the summer, when no one wants it — and that solar thermal heat is almost impossible to store.
Grid-connected PV systems, on the other hand, give homeowners credit for 100% of the energy produced — so they come out ahead.
ANSWERED BY MARTIN HOLLADAY, GBA ADVISOR – Jul 12 10
via Solar heat storage in sand bed under house slab? | GreenBuildingAdvisor.com.
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