[BLDG-SIM] DOE2.2 - Modeling "Fins" on Buildings
Graham Carter & Megan Lyall
hamnmegs at ozemail.com.au
Tue Feb 20 17:35:25 PST 2007
Lynn
The Therm software publicly available from the Windows & Daylighting
group at LBNL allows a 2D finite element analysis of frames / thermal
bridging. I have used this to look at aluminium and concrete thermal
bridging to arrive at "effective" insulation values. I use this
information to adjust inputs on other programs such as DOE-22 to
reduce insulation thicknesses etc. Not sure what version Therm is up
to but it is industry recognised for this type of analysis and allows
a range of boundary conditions to be defined (heat flux, convection,
long wave radiation etc).
Regards,
Graham
On 20/02/2007, at 12:17 PM, Lynn Qualmann wrote:
> I am modeling a proposed building with rectangular concrete pillars
> that thermally bridge the building shell with neither interior nor
> exterior insulation. The exterior portion of the pillars extend
> about 1.5' beyond the building's skin and are 1.5' wide. There are
> enough of them that they shouldn't be ignored, but I haven't found
> any good references on how to model them. I am assuming either an
> adjustment to the exposed area of the pillar or an adjustment to
> the material characteristics is in order. I don't want to make this
> into a research project, so I'm wondering if there are any good
> rules of thumb out there. Anyone?
>
> Thanks in advance for any ideas.
>
> R. Lynn Qualmann, P.E.
> SBW Consulting, Inc.
> 2820 Northup Way #230
> Bellevue, WA 98004
> Phone: (425) 827-0330
> Fax: (425) 822-8119
> e-mail: rlq at sbwconsulting.com
>
>
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