What else found strange for me was the fact that a colleague model, like mine, have not shown this warning...
I'll find more information aboute the Airflow Network Model, for better understanding.
Thanks a lot!
Paulo Roberto.
Paulo:
The warning messages are informative. When the SurfaceAverageCalculation choice is entered, the model can generate wind pressure coefficients for 4 vertical exterior orientations and 1 horizontal roof. It is better to follow suggestions. If your intent is to use 2 exterior surfaces, you may ignore warning messages.
Hope this helps.
Lixing Gu
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Monday, October 31, 2016 11:02 PM
To: EnergyPlus_Support@yahoogroups.c om
Subject: [EnergyPlus_Support] Problem with AirflowNetwork
Hello, everybody!
I'm simulating a 4 zones model (two on the ground, one on the side and one above the first two) using the EnergyPlus model of natural ventilation.
I have reviewed the model in the SketchUp and DXF file. It's OK, but I am getting the following warnings:
Program Version,EnergyPlus, Version 8.4.0-832e4bb9cb, YMD=2016.11.01 00:36,IDD_Version 8.4.0
** Warning ** GetAirflowNetworkInput: SurfaceAverageCalculation is entered for field = Wind Pressure Coefficient Type, but no roof surface is defined using an AirflowNetwork:MultiZone:Surface object.
** ~~~ ** Reconsider if this is your modeling intent. Simulation continues.
** Warning ** GetAirflowNetworkInput: SurfaceAverageCalculation is entered for field = Wind Pressure Coeffi cient Type.
** ~~~ ** The AirflowNetwork model provides wind pressure coefficients for 4 vertical exterior orientations and 1 horizontal roof.
** ~~~ ** There are only 2 exterior surface orientations defined in this input file using AirflowNetwork:MultiZone:Surface objects.
** ~~~ ** Reconsider if this is your modeling intent. Simulation continues.
************* Testing Individual Branch Integrity
************* All Branches passed integrity testing
************* Testing Individual Supply Air Path Integrity
************* All Supply Air Paths passed integrity testing
************* Testing Individual Return Air Path Integrity
************* All Return Air Paths passed integrity testing
************* No node connection errors were found.
************* Beginning Simula tion
************* Simulation Error Summary *************
************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
************* EnergyPlus Sizing Error Summary. During Sizing: 0 Warning; 0 Severe Errors.
************* EnergyPlus Completed Successfully-- 3 Warning; 0 Severe Errors; Elapsed Time=00hr 00min 18.47sec
Could someone explain to me what this is and which is the possible cause of the problem?
Thanks for regards,
Paulo Roberto.