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Re: [EnergyPlus_Support] IFCtoIDF and IFC HVAC Interface Questions

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] IFCtoIDF and IFC HVAC Interface Questions
From: Rob Hitchcock <RJHitchcock@xxxxxxx>
Date: Wed, 05 Apr 2006 15:11:31 -0700
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Support for IFCs is currently provided in Autodesk Architectural Desktop 
through G.E.M. Team Solutions GbR and their partner Inopso (see 
http://www.inopso.com/).

Rob
==========
zecchin marco wrote:

> Hello,
>   I want to know how can i make a IFC file with architectural desktop, 
> normally is one of the three CAD software able to write in this file type.
>   thank you,
>   Marco
>  
> Rob Hitchcock <RJHitchcock@xxxxxxx> a écrit :
>   Christopher,
>
> IFCtoIDF is a utility that imports building geometry from an IFC data
> file and exports an EnergyPlus IDF with an energy simulation view (i.e.,
> thermal view) of that geometry.  IFCtoIDF has been developed using the
> BSPro middleware for IFC import.  We are currently working with the
> developer of BSPro to iron out problems in IFCtoIDF in using the latest
> update of BSPro.
>
> Since IFCtoIDF is designed to work with the IFC data format, independent
> from the CAD environment that generates an IFC data file, it is intended
> to work with any IFC data file from any CAD vendor.  In reality, this is
> problematic since different CAD vendors implement their IFC export in
> different ways.  This issue becomes important when you also have to
> transform what might be called the "architectural view" created in the
> CAD environment, into a "thermal view" necessary for energy simulation
> (e.g., subdividing a floor/ceiling slab covering the entire building
> footprint into surfaces bounding thermal zones above and below the slab).
>
> With this background in mind, I have appended responses from a colleague
> to your specific questions below.
>
> Rob Hitchcock
> -- 
>
> Robert J. Hitchcock, Ph.D.
> Lawrence Berkeley National Laboratory
> 1 Cyclotron Road, Mailstop 90-3111
> Berkeley, CA  94720
>
> RJHitchcock@xxxxxxx
>
> ______________________________________________________________
>
> Q: Am I correct in understanding that the IFCtoIDF utility is one
> directional?
> A: Yes.
>
> Q: And you cannot convert back to IFC from IDF??
> A: Correct - you cannot rewrite building geometry without an appropriate
> CAD tool.
>
> Q: Has anyone had success moving information from Revit to E+?
> A: Yes, but only on an experimental basis.
>
> Q: If not Revit are there other CAD style or IFC editors anyone has had
> luck using?
> A: You need to use a model based CAD tool that can output a valid IFC2x2
> file.  ArchiCAD 9 is one such example.
>
> Q: IFCtoIDF only deals with building geometry?
> A: Yes.  Another tool is under development that will do more (e.g.
> import construction material layers defined in CAD).
>
> Q: Am I looking for the wrong name of the ["IFC HVAC interface"] software?
> A: The full, correct name is "IFC HVAC interface to EnergyPlus."
>
> Q: Has anyone used this software?
> A: Only in testing.
>
> Q: Does anyone know how/where to get this software?
> A: A beta version based on IDD versions 1.1.0 and 1.1.1 is available
> from LBNL upon request - contact this writer.
>
> Q: Does it actual[ly] work as described (Convert IFC mechanical
> information into and back out of IDF format)?
> A: It does in tests performed so far.
>
> Dr. Vladimir Bazjanac
> Lawrence Berkeley National Laboratory
> vlado@xxxxxxxxxxxxxx
> ______________________________________________________________
>
>
> mcdonaldce05 wrote:
>
> > Howdy,
> >
> > I have a number of questions and if you can answer any of them that
> > would be of great help. I am interested in the IFC to IDF file
> > conversion capabilities mentioned on the DOE website. I've downloaded
> > the IFCtoIDF utility and installed the BSPro COM server. I also have
> > Autodesk Revit installed on the machine and am trying to convert
> > simple buildings over to Energy Plus.
> >
> > Am I correct in understanding that the IFCtoIDF utility is one
> > directional?
> >
> > And you cannot convert back to IFC from IDF?
> >
> > Has anyone had success moving information from Revit to E+?
> >
> > If not Revit are there other CAD style or  IFC editors anyone has had
> > luck using?
> >
> > IFCtoIDF only deals with building geometry?
> >
> > I've read about a utility called the "IFC HVAC interface". However, I
> > could not nail down if it was even released. Here are some questions
> > about that.
> >
> > Am I looking for the wrong name of the software?
> >
> > Has anyone used this software?
> >
> > Does anyone know how/where to get this software?
> >
> > Does it actual work as described (Convert IFC mechanical information
> > into and back out of IDF format)?
> >
> > Can anyone share experiences using this?
> >
> > If you have any information or experiences with any of the questions
> > above or are also interested in this type of information re-use using
> > IFC please feel free to contact me.
> >
> > -Christopher
> >
> >
> >
> >
> >
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> > http://www.energyplus.gov
> >
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References:
- Re: [EnergyPlus_Support] IFCtoIDF and IFC HVAC Interface Questions
  - From: zecchin marco

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