ROM simulation fails for a zone without windows

[PGorzalka]

If a TEASER model with no window area is exported to AixLib, simulation fails due eqAirTempWall.sunblind not being connected from the outside in ThermalZone. The reason is that eqAirTempWall is conditional to (sum(zoneParam.AExt) + sum(zoneParam.AWin)) > 0, but the input from simpleExternalShading is conditional to sum(zoneParam.ATransparent) > 0.

I suggest removing the conditionality of simpleExternalShading and corGMod in AixLib.ThermalZones.ReducedOrder.ThermalZone.ThermalZone.

[DaJansenGit]

Hey @PGorzalka, thanks for posting this issue.

Your approach would work, but wouldn't it be more elegant to make the input sunblind conditional based on sum(zoneParam.ATransparent) > 0 as well in AixLib.ThermalZones.ReducedOrder.EquivalentAirTemperature.BaseClasses.PartialVDI6007? In this case the following equation in the model also needs to be conditional:

TEqWin=TDryBul.+delTEqLWWin*(ones(n)-sunblind);

Maybe I'm missing something?

[PGorzalka]

Hey @DaJansenGit , this could indeed be a more elegant solution, but AixLib.ThermalZones.ReducedOrder.EquivalentAirTemperature.BaseClasses.PartialVDI6007 is an IBPSA model, so I'm not sure if there is room for such changes there. Furthermore, the logic of the sunblinds in the model makes it needed for each orientation no matter the weight factors, so that wouldn't be in line with the current way of modelling.

So I'd rather go with the solution proposed in my first post.

[DaJansenGit]

Yes, I agree that making those changes regarding the orientation and that it is an IBPSA model is not the best solution. Please go ahead with your proposed solution.