Re: [EnergyPlus_Support] Natural Ventilation - Ventilation Object

["Michael J. Witte" <mjwitte@xxxxxxxx>]

A preliminary test of ventilation coefficients which result in a negative 
ventilation flow rate appears to produce invalid results (a bug report has 
been posted).  Avoid any coefficients which produce negative flow rates for 
VENTILATION.  Even though your control strategy is rather simple, I cannot 
think of a way to achieve this other than using a schedule.

Mike


On 6 Oct 2005, at 14:04, Arno Dentel wrote:

> Hello.
> I want to modell natural ventilation through external windows. The
> airfolw should 
> depend to the outside temperature. 
> The users should open the windows if the outside temperature is above 0
> °C. 
> And if the outside temperature is lower then 0 °C the windows are
> closed.
> So I modified the ventilation equation with a Temperature Term
> Coefficent of -0.05.
> But by outside temperatures under 0 °C, the airflow and
> Ventilation-Sensible Heat Loss are negative.
> What does EnergyPlus claculate in that case?
> Has the negative airflow an influence of the energy balance.
> 
> Thanks in advance.
> Arno
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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