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Re: [EnergyPlus_Support] new problems in airflow network :surface



Neslihan:

After looking at the input file, you defined two zones and two surfaces in 
the network input section only. When you use the network model, you have to 
establish a network to ensure airflow pathways. The air has to flow from one 
node to another node through an opening. In other words, each opening should 
have two node connected. In general, air can flow from an exterior surface 
and pass through all the nodes and end at the other exterior surface. In 
your case, the node represents a zone. The airflow can flow into ofis-Zone1 
from ambient and stop at the interior surface without further connection. 
That is why you input does not work. Figure 79 on page 608 in the Input 
Output Reference provides a good example.

Yes, it matters to use detailed opening or simple opening, because you will 
get different results due to different algorithms.

Lixing

----- Original Message ----- 
From: "neslihan turkmenoglu" <neslihanturkmenoglu@xxxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Sunday, February 03, 2008 6:13 PM
Subject: Re: [EnergyPlus_Support] new problems in airflow network :surface


> hi Lixing
> after your advices I defined my walls with interior
> surface and outside surfaces. ofis zone1 in which the
> cross ventilation will occur has one outside surface
> facing exterior and three outside surfaces facing to
> ofis zone 2. The program gives error as below;
>
>
> ** Severe  ** GetAirflowNetworkInput:
> AirflowNetwork:Multizone:Zone=OFIS-ZONE2
>   **   ~~~   **  has only one surface defined in
> AIRFLOWNETWORK:MULTIZONE:SURFACE
>   **   ~~~   ** Each zone should have at least two
> surfaces defined in AIRFLOWNETWORK:MULTIZONE:SURFACE
>
> when I define the other surface of ofis-zone1 facing
> to zone2 (in the ofis zone2, I assume that the only
> opening is the same window described for ofiszone1
> back window) and using the same linkage and nod name
> it gives the errors like this;
>
>   ** Warning ** GetAirflowNetworkInput:
> AirflowNetwork:Multizone:Zone=OFIS-ZONE2
>   **   ~~~   ** has more than one surface defined in
> AIRFLOWNETWORK:MULTIZONE:SURFACE, but has the same
> boundary conditions
>   **   ~~~   ** Please check inputs of
> AIRFLOWNETWORK:MULTIZONE:SURFACE
>   ** Severe  ** GetAirflowNetworkInput:
> AirflowNetworkComponent: The opening must be assigned
> to a window, door or glassdoor at OFIS1-ARKA DIS DUV
>   ** Severe  ** GetAirflowNetworkInput:
> AirflowNetworkComponent: The opening must be assigned
> to a window, door or glassdoor at OFIS2-BOLUCU-ARKA
>
> I couldn't find an example for airflow network with a
> window facing interior. I will be glad if you help me
> solving this. And in your mail you described
> everything for using detailed openinng component. I am
> using simple opening  component. Does it matter using
> detailed opening or simple opening in my example?
>
> I will upload the first situation idf file
>
>
>
>
>
> 
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