Re: [EnergyPlus_Support] Stack Ventilation - Airflow Network

["jeannieboef@xxxxxxxxx" <jeannieboef@xxxxxxxxx>]

Are your windows constantly open?

Mit freundlichen Grü�en- Sent from my iPhone (excuse the brevity)
i. A.
Jean Marais
b.i.g. bechtold
Tel.   +49 30 6706662-23
On 07.05.2014, at 22:33, <<mailto:santosh_philip@xxxxxxxxx>santosh_philip@xxxxxxxxx> wrote:

>  
> I am doing some experiments to see how stack flow ventilation works in Energyplus using Airflow Network. I am primarily interested in Stack ventilation and not in cross-ventilation.

> 
> 
> I made a simple box 20' X 30' X 25'(height)

> with 2 windows on the 20' elevation, on either side of the box

> one window is high and the other window is low

> 
> 
> To ensure that I get only stack ventilation, I modified the weather file so that windspeed is 0 m/s at all times.

> 
> 
> I looked at output variables

> - AFN Linkage Node 1 to Node 2 Volume flow rate (for both windows) - m3/s

> - AFN Linkage Node 2 to Node 1 Volume flow rate (for both windows) - m3/s

> - AFN Zone infiltration Air Change rate (ach)

> 
> 
> These numbers are internally consistent - the volume flow matches the ach.

> 
> 
> The ACH varies quite quite a bit through the year going from 0 ACH to 20 ACH

> I am trying to understand what makes the ACH change.

> What should I be looking at get a sense of this ?

> 
> 
> Any advice or pointers ?

> 
> 
> Thanx

> 
> 
> 
> 
> Santosh Philip

> 
> 
> 
> 
> 
> 



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