Creating an energy analysis model using a linked IFC - setting mode "room"

k.seifertRVEQN · ‎01-08-2022

Hello community,

I tried to create an energy analysis modell out of a linked IFC in Revit. The mode : "rooms" in the settings has to be used for my HVAC application. At first I tried to link a native .rvt-file and it worked perfectly regarding the result of the analytic surfaces at the centerline of the CAD-elements.
For the next step I wanted to try the neutral data exchange using a linked IFC. Creating the energy analysis model causes an unexpected interpretation regarding the gbXML-scheme. Instead of placing analytical surfaces at the centerline of CAD-elements, boundary surfaces have been used. In order to do my calculation in DIN-standart the program needs the analytical surfaces at the centerline of the CAD-elements and not the boundary surfaces at i.e. the inner side of the walls. Also the surfaces only inculude inner or outer walls and not windows, doors etc. Or else outer and inner windows or doors are interpret as walls as well. Are there any opportunities to fix this problem using pluig-ins or other setting? Is this problem occured earlier or am I the first one recognising ? Could there be any problems with my IFC-modell or this this problem standard case?

I hope someone may help me.

Thanks a lot!

Konstantin

fabiosato · ‎01-12-2022

Hello,

For this workflow, instead o linking the IFC file, I do the following:

1 - Use OPEN IFC to convert it into RVT format, save the converted file. Be aware to check the IFC settings and class conversion.

2 - Link the converted RVT and you may have the rooms, they should be exported to the IFC format, in the first place.

Fábio Sato
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k.seifertRVEQN · ‎01-13-2022

Hello fabiosato,

thank you for your answer. Do you use Revit 2022 or an earlier version? I´ve tried this workflow for three independ modells and it does not work perfectly in all cases. Every energy analysis model has the same problems regarding my written question. It also might be a systematicaly problem of the new Revit 2022 version because these settings had been changed since then.

Thank you anyway!

Best regards.

fabiosato · ‎01-17-2022

Hello,

We are not using Revit 2022 so far.

Fábio Sato
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Creating an energy analysis model using a linked IFC - setting mode &quot;room&quot;