[Equest-users] Underfloor Patchwork

[B. Fountain]

There was a paper written by Fred Winklemann on calculating an effective
U-value as a function of perimeter length and insulation configuration. 
This is what eQUEST is doing for each zone.

You can find the paper here:
http://esl.tamu.edu/pub/DOE-2_OCR_Manuals/DOE-2%20articles%20(ground%20coupling%20model%20pg.05).pdf



> Long time back there was a write up on how to calculate the impact of
> soil - and generate fictitious layer for walls/floors in contact with
> soil - I think it was in the building simulation user news, with respect
> to DOE-2.1 e. Depending on the perimeter area, the equivalent R-value of
> the fictitious material is different. Probably equest uses the same
> procedure.
>
> -Rohini
>
>
>
> From: equest-users-bounces at lists.onebuilding.org
> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Vikram
> Sami
> Sent: Tuesday, August 11, 2009 2:38 PM
> To: equest-users at lists.onebuilding.org
> Subject: [Equest-users] Underfloor Patchwork
>
>
>
> This is a question that I've wondered about for a while. When you come
> out of the wizard, an UF material is created for each zone(like below),
> with different properties for each zone - with an amazing variation in
> properties across the board. Does anyone know why? Is it reasonable to
> assign one material to all of them (assuming they are the same
> construction and sitting on the same soil), and if so, how do I know
> which material to pick out of the 20+ construction assemblies created?
>
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> Vikram Sami, LEED AP
> Direct Phone 404-253-1466 | Direct Fax 404-253-1366
>
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