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[EnergyPlus_Support] Ventilated facdes

I found some troubles modeling ventilated facades in newer versions 7.2 & 8 (in version 6 it works properly)

I model the surface wit “Other Side ConditionsModel” I include the “Surface property Other side conditions model” and “Exterior Natural Vented Cavity” objects and the model runs ok if there are no windows in the surface


if there are windows on the surface,  I got the following severe error.  ** GetSurfaceData: Subsurface="VENTANASUR" exterior condition [ExternalEnvironment] in a base surface="SURSALON" with exterior condition [OSCM]


Is it a bug in V8.0? or I m doing something wrong?


Josep Solé
URSA Insulation S.A

Sustainibility & Technical Manager 

Móvil +34 606 42 32 14




P URALITA / URSA se compromete con el ahorro de energía. Antes de imprimir este mensaje asegúrese de que es necesario.


De: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] En nombre de anisur1294@xxxxxxxxx
Enviado el: viernes, 11 de octubre de 2013 2:58
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Asunto: [EnergyPlus_Support] Unit Conversion for ESO file





I am optimizing the energy performance by coupling EnergyPlus with GenOpt. GenOpt collects the results from ESO output file where the unit is set to JOULE by default. As the values are very big number, GenOpt shows error for that. I converted SI unit to IP unit from EpLauncher option, but it works only for manual runs. For automatic runs with GenOpt, it goes to the default SI setting automatically. 


Is there anyway that I can change the unit to GigaJoule/kWh/Btu in IDF file that will change the unit in ESO file? 


Or Is there anyway that I can set it that for automatic runs with GenOpt also it will convert to IP?


Any suggestion will be appreciated.


Anisur Rahman


PhD Candidate, IIT Chicago

Energy Analyst, Buro Happold Chicago


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