Re: [EnergyPlus_Support] Airflow network in a mall

[Lixing Gu <gu@xxxxxxxxxxxx>]

Marzia:

I found the four opening components have 0 values for the Width factor for 
Opening factor #2 field. When both values of Width factor for Opening factor 
#1 and Width factor for Opening factor #2 are zeros, the opening is 
considered as fully closed. That is why no airflows. Figure 83 on page 659 
in the Input Output Reference provides information on geometrical factors 
used in opening object.

The Width factor for Opening factor #2 field value has to be greater than 0. 
The new release will force the input value >0. After I changed the value to 
1.0, the results show airflows in the four openings. I only ran a couple of 
days.

By the way, other openings also have 0 values in the same field.

Lixing Gu

----- Original Message ----- 
From: "marziasedino" <marziasedino@xxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Wednesday, March 26, 2008 5:06 AM
Subject: [EnergyPlus_Support] Airflow network in a mall


> Dear Sirs,
>
> We are modelling a circular patio which is located inside a mall with
> a big glass trumpet-shaped roof and we would like to simulate its
> airflow network.
> We created the model with DesignBuilder and then exported it in E+.
> In particular we are studying the airflow through four openings we
> created:
> in the thermal zone "36376"  there is a wall (heat transfer surface
> facing the external) named "W_36376_0_0_0".
> With this wall base surface we created:
>
> 1) voids (as defined by DesignBuilder)
> 2) W_36376_0_0_0_0_1 opening
> 3) W_36376_0_0_0_0_2 opening
> 4) W_36376_0_0_0_0_3 opening
> 5) W_36376_0_0_0_0_4 opening
>
> we are studying airflow network through these four openings during 2
> weeks in January: we are trying to let them open all the time.
> In the Airflownetwork:Multizone:Surface for each openings we set the
> Ventilation Control Mode CONSTANT and the Venting Availability
> Schedule Name: ON, with which we assume the openings to be always
> open.
> The problem is that if we looked at the results there is no flow
> through the openings, which is not what we are expecting.
> Could help us in finding the mistake?
> We uploaded our file in the Problem_Submittals, it is called "airflow
> network in a mall".
>
> Thanks a lot
>
> Marzia
>
>
>
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