Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
3

How do you create wall assemblies in OpenStudio for a large building?

asked 2016-01-06 10:55:13 -0500

VictoriaEagen's avatar

updated 2016-10-20 19:39:55 -0500

How do you create wall assemblies in OpenStudio? I understand where the buttons are and how to ultimately create an assembly, just not sure the best way to go about it. I am doing a very large building, so should I just create a general wall assembly for the larger portions of the building and assume they are uniform throughout those sections? Or is it a general practice to go through every wall assembly and create each wall individually. I understand one way is just more accurate, just wondering what people do in general. Also, if there is a material not found in the "Library" and I need to add a material, is there a good place to find the thermal conductivity, resistance, smoothness, etc...? Thank you.

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
3

answered 2016-01-06 11:20:20 -0500

updated 2016-01-06 11:25:11 -0500

It depends upon how much time you want to spend sketching individual surfaces with different wall assemblies, since this is more time-consuming than creating the individual wall assembly objects. Another thing to think about is simulation time, since adding more surfaces will increase the number of heat transfer calculations performed at each timestep. If there's lots of variety in wall assemblies, I would suggest to make a uniform wall assembly that is the area-weighted average of all assemblies:

$U_{avereage} = (U_1 A_1 + U_2 A_2 + ... )/A_{total}$

If you're not trying to model daylight harvesting accurately, you can make sketching easier by lumping windows together as long as the total area and U-value is correct.

Someone has asked a question about material properties HERE.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Careers

Question Tools

Stats

Asked: 2016-01-06 10:55:13 -0500

Seen: 170 times

Last updated: Jan 06 '16