[Equest-users] Taking into account wind on building surface

[Keith Swartz]

Patrick,

I don't know for certain, but I would be very surprised if the program adjusted the wind speed for the building shape. It seems to me like that would need a CFD-like calculation for the air flow around the building.

The program can take into account the surrounding terrain. In the Project & Site module under Site Data there is a tab for Terrain. See the Help screens for more details.

[cid:image003.png at 01CDCE0A.509B1CF0]

Keith Swartz, PE, LEED AP
Senior Energy Engineer | Energy Center of Wisconsin | Madison.Chicago.Minneapolis
608.210.7123 | www.ecw.org<http://www.ecw.org/>

From: Patrick Keeney [mailto:38keeney at cardinalmail.cua.edu]
Sent: Wednesday, November 28, 2012 4:48 PM
To: Keith Swartz
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Taking into account wind on building surface

Thanks Kieth.

This makes sense. Based on air speed and air pressure, you would expect to see an adjusted air infiltration.

However, does eQuest take into account the location of the facade in the context of the building.  For example, if you had a U-shaped building, the faces on the interior of the "U" would not see as much direct wind exposure as the faces on the exterior of the "U."  Does eQuest take into account the effects the building geometry will have?

On Wed, Nov 28, 2012 at 4:46 PM, Keith Swartz <kswartz at ecw.org<mailto:kswartz at ecw.org>> wrote:
Patrick,

eQUEST accounts for wind with most of the infiltration methodologies. From the Help screen...

[cid:image001.jpg at 01CDCE09.414F5C80]

...and...

[cid:image002.jpg at 01CDCE09.414F5C80]

Keith Swartz, PE, LEED AP
Senior Energy Engineer | Energy Center of Wisconsin | Madison.Chicago.Minneapolis
608.210.7123<tel:608.210.7123> | www.ecw.org<http://www.ecw.org/>

From: Patrick Keeney [mailto:38keeney at cardinalmail.cua.edu<mailto:38keeney at cardinalmail.cua.edu>]
Sent: Wednesday, November 28, 2012 12:21 PM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] Taking into account wind on building surface

Hey All,

I was hoping someone could clarify whether or not eQuest takes into account the wind load placed on the exterior surface of the building.  I know that the direction, speed, and temperature of the prevailing breezes are included in the weather file, but am unsure as to whether or not this data is included on heat transfer through the building envelope.

The case in point is a large facade directly aligned with the winter prevailing breezes of our site and whether or not this heat transfer is being accounted for on the surface.

Any and all help is much appreciated.
Thanks.

--
Patrick J Keeney
MArch-MSSD Candidate
410-299-5627<tel:410-299-5627>



--
Patrick J Keeney
MArch-MSSD Candidate
410-299-5627
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