invalid Outside Boundary Condition Object=<blank> [closed]

asked 2015-07-22 02:39:05 -0500

Eva's avatar

updated 2015-07-22 09:49:50 -0500

Hi, i have a problem about surface Outside Boundary Condition when i use energyplus and openstudio .

the question is that: * Severe * BuildingSurface:Detailed="SURFACE 18", invalid Outside Boundary Condition Object=<blank>. * ~~~ * ..Outside Boundary Condition="Surface" must be non-blank. * ~~~ * ..This surface will become an adiabatic surface - no doors/windows allowed.

In my case, there are two matched surfaces in two different spaces and two different thermal zones. So which Outside Boudary Condition should we choose, surface(which i chose and caused this error), or Adiabatic etc?

In addition, if the two matched surfaces are in two different spaces but one same thermal zone, which Boundary Condition?


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Closed for the following reason duplicate question by David Goldwasser
close date 2015-07-28 10:20:37.640395


Use the facility tab sorted by thermal zone as shown on this post to confirm that both spaces in question are in fact part of a thermal zone. That is the most likely cause. Let me know if that doesn't resolve the issue.

If it does then this would be duplicate question to this post.

David Goldwasser's avatar David Goldwasser  ( 2015-07-22 09:46:38 -0500 )edit

David, thanks very much. I just solved this probelm by doing surface matching in Openstudio. But I have another question: when i import idf from openstuio where a two floor building is built by creating space from diagram and surface matching is also done, it seems that the two matched surfaces are lost and there are only ten surfaces in EnergyPlus. Thank you again!

Eva's avatar Eva  ( 2015-07-22 20:35:31 -0500 )edit

If two spaces are part of the same thermal zone, then when exported to IDF the matched surface between those spaces will just be an internal mass object in EnergyPlus. So you would only have 10 surface objects.

David Goldwasser's avatar David Goldwasser  ( 2015-07-22 22:27:32 -0500 )edit

oh got it, thanks :-)

Eva's avatar Eva  ( 2015-07-23 01:31:00 -0500 )edit