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[EnergyPlus_Support] Re: "AFN Wind Pressure Coefficient Typ" = "Input" does't work
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] Re: "AFN Wind Pressure Coefficient Typ" = "Input" does't work
- From: "Jean marais" <jeannieboef@xxxxxxxxx>
- Date: Tue, 19 Feb 2013 13:42:20 -0000
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submit this to the help desk.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "tobiasschulzeoooitu" <tobias.schulze@...> wrote:
>
> 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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