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Legacy OpenStudio vs. EnergyPlus vs. OpenStudio Suite

asked 2017-11-06 08:05:09 -0500

Arghavan.A's avatar

updated 2017-11-06 10:29:44 -0500

If the model is first created in Revit and imported as gbXML to SketchUp Make, Is there a difference if we perform analysis directly inside Legacy OpenStudio plugin in SketchUp or export it to IDF and perform the analysis inside EnergyPlus, or even use the OpenStudio Suite? Can you please guide me on the differences of these three?

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answered 2017-11-06 12:14:14 -0500

gbXML is a file format that allows disparate 3D Building Information Model (BIM) tools, like Revit, and architectural/engineering analysis software, like SketchUp and EnergyPlus, to share information with each other. After importing a gbXML file into SketchUp, you can then alter the file's geometry in a few ways:

  • SketchUp is an architectural software to draw surfaces of buildings, and works with files using the .skp file extension. Editing the .skp file will ONLY change the geometry for architectural renderings and not impact energy simulations.
  • Euclid is an extension or plug-in that creates and edits geometry for EnergyPlus input files using the .idf file extension while working in SketchUp. This tool was previously known as Legacy OpenStudio. Any other facets of the EnergyPlus input file besides geometry (material layers, construction assemblies, schedules, internal gains, HVAC, etc.) must be added to the .idf file outside of SketchUp.
  • OpenStudio is an interface for creating EnergyPlus input files, and it uses the .osm file extension. There is a separate extension or plug-in that creates and edits geometry for OpenStudio .osm files while working in SketchUp. This extension also allows you to define space types, thermal zones, and other information while viewing the geometry in SketchUp. If you need to create schedules, constructions, internal gains, HVAC, etc. then you must add those to the .osm file outside of SketchUp.

To perform an analysis, or run a simulation, it should not matter whether you do that in SketchUp or outside of SketchUp directly in EnergyPlus or OpenStudio. Again, SketchUp is a tool that allows you to edit geometry for building energy models.

For more information, you can read @__AmirRoth__ 's article about the history of the Euclid extension for SketchUp HERE.

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Which separate OpenStudio extension are you referring to that allows you to edit OpenStudio file geometry in Sketch-Up?

yhshaker2's avatar yhshaker2  ( 2017-11-13 16:03:38 -0500 )edit

Thank you! very helpful!

Arghavan.A's avatar Arghavan.A  ( 2017-11-13 16:48:27 -0500 )edit

@yhshaker2 when you install OpenStudio, there is a SketchUp extension that comes with it. In the most recent version 2.3 of OpenStudio, you can select whether you want to install this SketchUp extension or not (previously it would always install without asking first).

Aaron Boranian's avatar Aaron Boranian  ( 2017-11-16 12:53:31 -0500 )edit

@Aaron Boranian i have one question for you: so, can i do all my simulations using only OpenStudio, that is, dont need to use EnergyPlus? I have been searching for this for a long time and found little information that would help me in a complete simulation of a building (informing all the steps and processes).

UilissonGFM's avatar UilissonGFM  ( 2018-10-28 10:56:39 -0500 )edit

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Asked: 2017-11-06 08:05:09 -0500

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Last updated: Nov 06 '17