Re: [EnergyPlus_Support] IFC to IDF

[Bing Dong <allen_dongenergy@xxxxxxxxxxxx>]

Hi Mike,
 
The building I drawed did have such basic elements. However , it does not work. I have no idea. 
I will try some different ways again. 
Maybe IFC is not popular in energy analysis group. 
 
Thank you anyway.
 
Regards,
 
Allen

"Michael J. Witte" <mjwitte@xxxxxxxx> wrote:
>From the IFC to IDF User Manual:

"Geometry is extracted for the following IFC classes:  IfcBuilding, 
IfcBuildingStorey, IfcSpace, IfcWall, IfcWindow, IfcDoor, IfcFloor, 
IfcRoofSlab."  

I do not use CAD tools, so I cannot speak for sure, but my understanding is 
that you must have Building, Space, and Surface (Wall, Window, Door, Floor, 
Roof) objects.  Does that help?

Mike



On 21 Sep 2005, at 14:24, allen_dongenergy wrote:

> Dear All,
> 
> I have problems with IFC to IDF. 
> 
> 1. I use ADT to draw a simple building. The command in ADT I use 
> is "Design"->"add wall"->"add slab".........then I export as IFC 
> file. I try to use BSpro to convert IFC to IDF, there are several 
> warnings and errors as below:
> 
> ! WARNING - No Building instances found in the IFC file.
> 
> ! WARNING - Thermal Surfaces, especially Floors and Ceilings may be 
> incorrectly positioned.
> 
> ! ERROR - No Space instances in IFC file
> 
> 
> 2. I tried to use "space" and "space boundary "command in ADT to 
> draw,but the errors are below:
> 
> ! Number of Exterior Surface Objects returned by GetExteriorSurfaces 
> for Space EKMcGW%< LY)xy7aH0@2 = 0
> 
> ! WARNING: Space EKMcGW%< LY)xy7aH0@2 Area = 12767.905982 - 
> Remaining Unwritten Floor Area = 12767.905982
> 
> ! WARNING: Space EKMcGW%< LY)xy7aH0@2 Area = 12767.905982 - 
> Remaining Unwritten Ceiling/Roof Area = 12767.905982
> 
> Is there anyone know how to draw a acceptable building in ADT? 
> Actually I can run through GBS(green building studo which 
> usesDOE2.2) correctly using the first drawing method. 
> 
> 
> Thank you very much!
> 
> Regards,
> 
> Allen
> 
> 
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the
> "search" button.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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