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[EnergyPlus_Support] "AFN Wind Pressure Coefficient Typ" = "Input" does't work
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- Subject: [EnergyPlus_Support] "AFN Wind Pressure Coefficient Typ" = "Input" does't work
- From: "tobiasschulzeoooitu" <tobias.schulze@xxxxxxxxxxxxxx>
- Date: Tue, 19 Feb 2013 12:30:53 -0000
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Hello,
I have difficulties with the Airflow Network in E+ v7.2. May be there is a bug.
The AFN doesn't consider my defined external node height.
In the "AirflowNetwork:MultiZone:ExternalNode" object all nodes set at 10m and Cp values and the arrays are defined.
In the "AirflowNetwork:SimulationControl" oject "Wind pressure Coefficient Type" set to "Input".
Doesn't matter what I do the "AFN wind pressure"s calculated are always based on local height wind speed calculations (the ASHRAE power law) - not on the node height defined.
Design day wind speed 3 m/s
building terrain = country
AFN all nodes height = 10m
therfore all calculated wind pressures should be based on 3 m/s
if the Cp's are equal, same wind pressure independent on height of the external opening
But outputs show they are dependend on height.
Can you please check that issue?
Thank you and regards
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