[Bldg-sim] Energy Modeling for Complex Facade

[Marcus]

I've had a little experience in complex envelope geometry, although I've
never used ArchiCAD or Ecodesigner. Generally speaking though, energy
modeling software can't use curved geometry. Any curved surface has to be
approximated using planar surfaces. Modeling software need this planar
geometry in it's internal algorithms, especially to calculate the radiative
heat transfer and shading.

The approach I have used, for Energyplus, is to manually mesh a curved
surface using many smaller triangular surfaces. There are likely ways to
automate the process if you have very complex and large geometry.

Cheers,

Marcus
-- 
Marcus Jones, LEED AP, M.Sc.
*Freelance energy consultant*
*Vienna, Austria*


On Mon, Jul 11, 2011 at 11:07 AM, Lars O. Grobe <grobe at gmx.net> wrote:

> Hi Simon,
>
> could you give some more information on the nature of that "complex spiral
> 3d shading system"? It would probably be intersting whether this is a light
> redirecting system, a solid structure or more like sheet, can be controlled
> or is static...
>
> Cheers, Lars.
>
>
>  Dear All,
>>
>> Hope all are well.
>> Currently I have a ArchiCAD BIM model and need to perform energy modeling
>> to LEED compliant.
>> I wonder if anyone has worked on ArchiCAD BIM model before, mind to shed
>> some thoughts if the Ecodesigner module can perform LEED compliant modeling?
>> How about alternative softwares?
>>
>> Since the facade has complex spiral 3D curvy shading system I doubt the
>> ability of EQuest or Energy Plus to model the geometry.
>> Appreciate some insightful thoughts from all the members out there.
>>
>> Many thanks in advance.
>>
>> --
>> Regards,
>> Simon C.
>>
>
>
>
> ______________________________**_________________
> Bldg-sim mailing list
> http://lists.onebuilding.org/**listinfo.cgi/bldg-sim-**onebuilding.org<http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org>
> To unsubscribe from this mailing list send  a blank message to
> BLDG-SIM-UNSUBSCRIBE@**ONEBUILDING.ORG<BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20110712/58dc80e9/attachment-0002.htm>