How to Store Solar Energy Under a Concrete Slab - Fine Homebuilding

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Editor's Notepad

Editor's Notepad


How to Store Solar Energy Under a Concrete Slab

comments (1) March 6th, 2012 in Blogs
ScottG Scott Gibson, contributing writer

Pumping solar-heated fluid through tubing embedded in sand. GBA experts ponder whether the heat gained from all this solar thermal equipment is worth the investmentClick To Enlarge

Pumping solar-heated fluid through tubing embedded in sand. GBA experts ponder whether the heat gained from all this solar thermal equipment is worth the investment


The idea of using a bed of sand under a concrete slab as a heat sink has been broached before, and John Klingel is wondering how, exactly, he should install PEX tubing to get the greatest possible benefit from the system. He poses that question in the GreenBuildingAdvisor Q&A forum.


More from greenbuildingadvisor.com

Podcast: How Heat Moves Through Houses

Podcast: Solar Thermal: Types, Cost, and Investment Advice

Can Heat Be Stored in a Sand Bed Beneath the House?


This isn't the first time the idea has been broached, but the conversation in this Q&A Spotlight draws on the experience of someone who's successfully used sand as insulated thermal mass to passively heat his home. The approach is not only relatively inexpensive, he says, but very effective, essentially allowing him to walk away from the house in 40-below weather without worrying that anything will freeze.

Still, skeptics doubt it can work as an active heating system, and wonder whether the cost of heating the sand to useful temperatures is really worth the trouble.

Read the whole article at Green Building Advisor.



posted in: Blogs, energy efficiency, green building, thermal mass, solar energy

Comments (1)

Benjamin1988 Benjamin1988 writes: seems like this is a concept relating to potential energy. Very cool

Benjamin Marcus Raucher
Posted: 7:13 am on March 9th

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