BIPV Problem IntegratedSurfaceOutsideFace mode in PV -

asked 2023-04-14 09:24:27 -0500

Ali__'s avatar

updated 2023-04-14 12:24:09 -0500

I used Designbuilder to model a BIPV on the southern wall of the building, it works well, when i run the simulation from DesignBuilder Everything works fine , now i tried to export the simulation file to EnergyPles, without any modifications i got the folwing error

* Severe * Must use a surface with internal source construction for IntegratedSurfaceOutsideFace mode in PV

So , basicly EnergyPlus uses IntegratedSurfaceOutsideFace in Heat Transfert integration mode of the Generator:Photovoltaic, The Construction is well set, I dont know where is the problem exaclty ; Plase halp, i need this Thanks

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disclaimer: not a DesignBuilder (DB) user, so consider the following with a grain of salt ...

Is it possible you're not recovering the final DB-generated version of the IDF? Since DB relies on E+ and you're successful with DB-launched E+ simulations, yet unsuccessful with the recovered IDF ... sounds like DB may be introducing last-minute touches to the IDF before launching a simulation.

Can you post the IDF excerpt of the Photovoltaic Generator? You can certainly add an internal source construction in the IDF, or instead test with another Heat Transfer Integration Mode.

Denis Bourgeois's avatar Denis Bourgeois  ( 2023-04-15 07:16:50 -0500 )edit

Thank you for answering, i used DB alot, and it always render acurate idf files, it is the first time having this issue, what is an internal source construction !?? why it is neccesary for IntegratedSurfaceOutsideFace,and does it change the componement of my envlope or change the thermal behavior of it !?

Ali__'s avatar Ali__  ( 2023-04-16 14:22:43 -0500 )edit

@Ali__ are you using the same version of EnergyPlus as the IDF created by DB? You can open the IDF in a text editor and search for the Version object type. This should be the same version of EP-Launch you are using to simulate the IDF.

Aaron Boranian's avatar Aaron Boranian  ( 2023-04-16 19:06:42 -0500 )edit

@aaron-boranian it is not the same, i unsed version updater to math it with my EP, but i ckecked both versions, the objects are all the same everything looks the same. i'm so confused .

Ali__'s avatar Ali__  ( 2023-04-17 02:39:56 -0500 )edit

A cell array can be coupled to the exposed construction layer of the host surface. This is required for some (not all) Heat Transfer Integration Modes (like IntegratedSurfaceOutsideFace); enabled using an InternalHeatSource. And yes, this sets/couples both construction layer + cell state temperatures at run-time.

Denis Bourgeois's avatar Denis Bourgeois  ( 2023-04-17 05:47:04 -0500 )edit