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FenestrationSurface boundary conditions and construction Errors

asked 2015-09-10 15:44:12 -0500

carinita gravatar image

updated 2015-09-11 09:10:17 -0500

hi !! I wonder if there would be a faster way to correct this error instead of the correct one by one:

FenestrationSurface : Detailed = "SUB AREA 75 " invalid blank Outside Boundary Condition Object
** ~~~ ** ... When Base Surface uses "Surface " as Outside Boundary Condition Object , subsurface must also specify specific surfaces in the adjacent zone.

and I have this error

** ** Severe FenestrationSurface : Detailed = "SUB AREA 14 " has an opaque surface construction; it should have a window construction.

it keeps coming and I do not yet know why the settings I put are good and they are the ones with double glazing.

C:\fakepath\error 1.PNG

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In the future, please add tags for the software you are using, in this case EnergyPlus. Did you confirm that the base surfaces hosting the fenestration surfaces also has a "Surface" boundary condition. That seems to be the issue for that set of sever errors.

As for the second error, I would go back and confirm that you don't have any opaque materials in the construction you are using for the sub-surfaces. Specifically what is between the two layers of glazing.

David Goldwasser gravatar image David Goldwasser  ( 2015-09-10 15:59:00 -0500 )edit

ok , got it for tags. For databases surfaces that not all who ' surface ' as a boundary condition , some surface have ' outdoors' ' or '' ground ' ' as a boundary condition and precise in these cases I have not put outside of boundary condition object.

for the second error , between the two glass layers there is a layer of air and I create this material with specific characteristics features namely the roughness , the thickness , density ...

carinita gravatar image carinita  ( 2015-09-10 16:54:57 -0500 )edit

Sorry for the answer to the second question, i just see exactly what you're talking David

carinita gravatar image carinita  ( 2015-09-10 17:39:18 -0500 )edit

Are you modeling with OpenStudio? If so a common cause of boundary condition errors is forgetting to assign one space in your model to a thermal zone. You end up with outside boundary object references that refer to surfaces in the unused space.

Whatever tool you are using check two things.

  1. Does the base surface for this fenestration surface also have "Surface" boundary condition
  2. Does the fenestration surface have an outside boundary object, and is that object also in the model.
David Goldwasser gravatar image David Goldwasser  ( 2015-09-10 23:22:55 -0500 )edit

The title is way too vague to be useful (I've modified it but it's not great, feel free to change). Also, the error messages that are in the post do not match the screenshot... I've changed it too

Julien Marrec gravatar image Julien Marrec  ( 2015-09-11 04:14:13 -0500 )edit

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answered 2015-09-14 13:35:09 -0500

Some of this has been covered in the comments above, but stating it here as an answer.

  1. The outside boundary condition of a fenestration surface (sub-surface) must match the outside boundary condition of the base surface. If the base surface has an outside boundary condition object, then the fenestration surface will need one also.

  2. Windows must use special window materials types. These include WindowMaterial:Glazing, WindowMaterial:Gas, WindowMaterial:GasMixture, WindowMaterial:Shade,WindowMaterial:Blind, and other WindowMaterial:* objects.

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Asked: 2015-09-10 15:44:12 -0500

Seen: 913 times

Last updated: Sep 14 '15