Surface type consistency

Hello,

I am working on some research project that deals with daylight and energy simulation, thus I was working on the model on GH. But the surface type of createHBSrfs doesn’t match with the outputs of Honeybee_Decompose Based On Type component, thus the consistency of the model becomes loose by the visualization and I am little bit concerned about the model and simulation result.

For example, srftype input for floor that touches ground, 2.5 “SlabOnGrade” in createHBSrfs doesn’t recognized as groundFloors on the decompose based on type rather its seen as exposed floor.

Does it really matter when doing energy simulation when the EPconstruction type is same?

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Permalink Reply by Mostapha Sadeghipour Roudsari on May 11, 2017 at 7:05am

Does it really matter when doing energy simulation when the EPconstruction type is same?

You should also consider the Boundary Condition which for a slabOnGrade is Ground but for exposedFloor is Outdoors. Your input 2.25 is underground slab and not 2.5 slabOnGrade. In any case, Decompose based on type is for visualization and as far as the construction and boundary condition is set correctly it will work fine in EnergyPlus.

Permalink Reply by Amaraa on May 11, 2017 at 8:40am

Yes indeed, I was trying with the different floor types for matching the outputs. And this capture was made while I was testing. Now I've checked the boundary condition and it seems quite Ok.
Thank you for clarifying.

Also one more thing, does childSurface of Honeybee_addHBGlz still cannot be 100% to the HBObj in the latest version of LBHB? Because i have red somewhere in the discussion forum that it cannot be over 95% of the ancestor surface due to Energy Plus.

Permalink Reply by Mostapha Sadeghipour Roudsari on May 11, 2017 at 8:44am

does childSurface of Honeybee_addHBGlz still cannot be 100% to the HBObj in the latest version of LBHB?

Yes, and it won't change unless EnergyPlus starts to support 100% glazing which I don't think will ever happen. You need a small offset for the child object (window) to be inside the parent object (wall).

Permalink Reply by Amaraa on May 29, 2017 at 1:03pm

I have simply used offset component to make the child surface with minimal distance possible and it works beautiful. Thank you :)

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