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How can I model floor thermal mass in BEopt with a slab floor

asked 2021-10-06 15:52:42 -0500

SteveF
66 ●3

I am trying to model floor thermal mass in BEopt. This works fine for a crawlspace or pier and beam foundation but is not available for a slab on ground construction. This appears to be a BEopt design decision.

Most of the floor will be polished concrete and a proportion of the thickness will act as thermal mass. Any ideas of a workaround or insights as to why this cant be modeled.

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answered 2021-10-06 18:14:35 -0500

shorowit

10891 ●180 ●9 https://www.nrel.gov/b...

updated 2021-10-06 18:40:44 -0500

Please read the description of the Floor Mass category -- it only defines the top layer of non-slab, conditioned floor surfaces (e.g., the floor between the first and second story, the floor above a crawlspace, etc.). Slab-on-grade surfaces are already assumed to be concrete and their properties (thickness, density, etc.) can be changed in the Slab category.

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Asked: 2021-10-06 15:52:42 -0500

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Last updated: Oct 06 '21

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