[EnergyPlus_Support] Re: Problem with Ventilation by Wind and Stack with Open Area

["ecoeficientees" <ecoeficiente@xxxxxxxxx>]

Just to comment, I tell you from memory but if I am not wrong Wind Speed at a height is calulated using Suburban profile. I don't know why this is fixed and doesn't let to use open country or urban profiles...

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>
> I think you mean the variable of WindExt used in Qw calculation at
> HVACManager.f90(2564):
> 
> Qw =
> Cw*Ventilation(J)%OpenArea*GetCurrentScheduleValue(Ventilation(J)%OpenAreaSc
> hedPtr)*WindExt
> 
> The WindExt is determined by the following line at HVACManager.f90(2394)
>  
>     WindExt = Zone(NZ)%WindSpeed
> 
> The Zone wind speed is determined by zone height at
> HeatBalanceSurfaceManager.f90(281):
>  
> Zone(ZoneNum)%WindSpeed = WindSpeedAt(Zone(ZoneNum)%Centroid%Z)
> 
> Therefore, the wind speed used in the Ventilation by Wind and Stack with
> Open Area object is a local wind speed.
> 
> Hope this helps.
> 
> Lixing 
> 
> -----Original Message-----
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of wanghaojie630
> Sent: Wednesday, October 17, 2012 11:26 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Problem with Ventilation by Wind and Stack
> with Open Area
> 
> I notice in the Engineering Reference the equation for ventilation by wind
> and stack uses local wind velocity to calculate the ventilation rate by
> wind, however, when I look into the source code for EP 7.1, the velocity
> seems to be the external wind velocity&#65292; which means it is the
> velocity at 10m height. So I wonder if I miss something or the code might be
> wrong?
> 
> 
> 
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