Question-and-Answer Resource for the Building Energy Modeling Community

Warning in OpenStudio [closed]

asked 2016-06-02 17:43:23 -0500

dana94_08
211 ●5

updated 2016-06-02 18:15:58 -0500

ericringold

10527 ●31 ●8 https://www.nrel.gov/b...

I have the following warning:

** Warning ** CalcSurfaceCentroid: 5 Surfaces have the Z coordinate < 0.
**   ~~~   ** ...in any calculations, Wind Speed will be 0.0 for these surfaces.
**   ~~~   ** ...in any calculations, Outside temperatures will be the outside temperature + 9.750E-003 for these surfaces.
**   ~~~   ** ...that is, these surfaces will have conditions as though at ground level.

What does this mean??

edit retag flag offensive reopen merge delete

Closed for the following reason the question is answered, right answer was accepted by dana94_08
close date 2016-06-17 18:03:29.722950

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2016-06-02 18:29:53 -0500

ericringold

10527 ●31 ●8 https://www.nrel.gov/b...

This warning means the simulation has determined that five surfaces in your model have centroids that lie below the building ground plane (Z = 0), and is letting you know that the exterior heat transfer of those surfaces in the simulation will not be affected by wind speed, and the exterior surface temperature will be assumed to be at ground level (the 9.740E-003 is a factor that corrects for the height of the weather station above ground).

edit flag offensive delete link

Comments

And what I have to do to delete that warning?

dana94_08 ( 2016-06-02 18:47:38 -0500 )edit

If those surfaces aren't supposed to be below ground, check to make sure the vertices are correct. If they are meant to be below ground, you should set the surface outside boundary condition to reflect that.

ericringold ( 2016-06-02 21:31:17 -0500 )edit

add a comment

Careers

Question Tools

1 follower

Stats

Asked: 2016-06-02 17:43:23 -0500

Seen: 186 times

Last updated: Jun 02 '16

Site design and logo: Copyright © 2015 Big Ladder Software LLC. All rights reserved.
The Unmet Hours and Big Ladder names and logos are trademarks of Big Ladder Software LLC.
User contributions licensed under the Creative Commons Attribution Share Alike 3.0 License.

Warning in OpenStudio [closed] edit

Closed for the following reason the question is answered, right answer was accepted by dana94_08 close date 2016-06-17 18:03:29.722950