Defining internal objects in EnergyPlus

answered 2017-03-07 11:25:00 -0600

20395 ●94 ●14 http://www.openstudio.net/

updated 2017-03-07 11:25:55 -0600

You can add Internal Mass objects with an IDF editor. If you are using the Legacy OpenStuido SketchUp plugin, it doesn't have access to this, however Interior Partitions in OSM files are translated to EnergyPlus Internal mass objects by default. But keep in mind, their position in space doesn't mater for the internal mass object since it just has an area and a construction and not a specific position in space. The position on interior partitions is for the benefit Radiance analysis.

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Here is a view of the Internal Mass objet in the OpenStudio application which looks similar to the EnergyPlus fields, but also offers option to normalize internal mass area per person or floor area.

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Comments

Thanks a lot David! but there should be a difference if the material is next to the window or the other side of room where it doesn't receive much sunlight, no?

Pouya ( 2017-03-08 03:19:00 -0600 )edit

Yes, it will affect daylighting levels and solar gain in the room.

David Goldwasser ( 2017-03-08 08:35:05 -0600 )edit

Depending on what you are trying to analyze, you may want to consider the Solar Distribution setting and how it may impact your results.

Lyle K ( 2017-03-08 17:06:34 -0600 )edit

Thanks for the hint Lyle, I intend to evaluate the influence of internal objects near the windows and how they can contribute to thermal performance of the building.

Pouya ( 2017-03-09 02:55:04 -0600 )edit

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