Ideal Load gives as result the energy DEMAND and any simulation including HVAC system gives the FINAL energy.
Energy demand and Final Energy are never identical due to System inefficiency
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 marko.ignjatovic1980@xxxxxxxxx
Enviado el: jueves, 05 de septiembre de 2013 10:44
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Asunto: [EnergyPlus_Support] Calculated design heating load difference
Hi guys,
I'm having trouble in finding the reason why there is a difference in calculated design heating load for my models. This is the problem. Both models have the same building with the same envelope and same WinterDesignDay schedules for indoor temperatures for sizing. In first model i used IdealLoadsAir system and the obtained design heating loads comply with the real buiding. But when I modeled HVAC systems, there was a great difference in calculated heating load. As we all know design heating load for zone is not dependent of HVAC systems serving it, but is function of envelope properties, interior and exterior conditions. Does any of You have any idea what could be the cause for this difference. I double checked all common objects for both models and they are the same.
Thanks in advance
Marko
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