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Boundary Condition using SurfaceProperty:OtherSideCoefficients

asked 2020-11-08 18:21:20 -0500

manatee's avatar

updated 2020-11-09 07:15:07 -0500

I'm setting the boundary condition for all 6 surfaces of one zone including a ceiling, a floor, and four walls using "SurfaceProperty:OtherSideCoefficients".

When I checked the outputs of "Surface Other Side Coefficients Exterior Air Drybulb Temperature", I found out that one of the object (Ceiling_BoundaryCondition) is always zero during the simulation time even though all the inputs are set as same as other objects. I'm not sure what makes this difference and need your help.

<"SurfaceProperty:OtherSideCoeffcients" Inputs> image description

<"Constant Temperature Schedule Name" Input> Schedule:File is used for "Constant Temeprature Schedule Name" input and confirmed it reads the right temperature set I've made in .csv file. image description

<"Surface Other Side Coefficients Exterior Air Drybulb Temperature" Outputs> The temperature calculated for Ceiling Boundary showing "0" not like other boundary conditions at the floor and walls. image description

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answered 2020-11-12 15:43:30 -0500

manatee's avatar

I ended up answering my own "stupid" question here - just for people who might make the same mistake...

Make sure if you select "OtherSideCoefficients" in "Outside Boundary Condition" at BuildingSurface:Detailed inputs, especially when you edit your idf in a text editor. If, for instance, "Outside Boundary Condition" is set to "Outdoors" as we usually put for exterior surfaces, "Surface Other Side Coefficients Exterior Air Drybulb Temperature" outputs would show "0" than whatever you expected.

Sorry for this mistake-driven question here and thank you, unmethours! :)

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Asked: 2020-11-08 18:21:20 -0500

Seen: 645 times

Last updated: Nov 12 '20