Re: [EnergyPlus_Support] Re: Vertical Stack to induce natural ventilation

[Lixing Gu <gu@xxxxxxxxxxxx>]

Ooi:

Zone creation is based on building geometry and simulation result accuracy. 
Each zone in EnergyPlus assumes uniform indoor conditions. If you would like 
to see temperature variation in a vertical stack, you may need more zones in 
your input. The AirflowNetwork model uses zone centriod z value as a height.

Lixing
----- Original Message ----- 
From: "ooikoonbeng2004" <kooi@xxxxxxxxxxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Thursday, February 22, 2007 2:07 AM
Subject: [EnergyPlus_Support] Re: Vertical Stack to induce natural 
ventilation


> Lixing Gu,
>
> A clarification on your first suggestion. Create zones one
> vertically above another? So far the two first examples on AirFlow
> Network show zones on the same level only. Can you give a bit more
> details?
>
> Many thanks,
> ooi
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>>
>> Ooi:
>>
>> The Airflow Network model is not a good model to simulate natural
>> ventilation in a vertical stack. The main reason is that the model
> does not
>> have a component to deal with large horizontal openings accurately
> for the
>> time being.
>>
>> However, you may try it with following suggestions using the
> AirflowNetwork
>> model:
>>
>> 1    Create one or more zones for a vertical stack
>> 2    Create a zone you would like to ventilate
>> 3    Use a component (AirflowNetwork:Multizone:Component Detailed
> Opening)
>> to connect the vetilated zone and the vertical stack zone.
>> 4    If you create more vertical stack zones, use the same
> compoent to
>> connect two vertical stack zones. One way flow will be obtained
> from
>> horizontal openings.
>> 5    Follow rules of the AirflowNetwork model to create a network.
> See
>> references to get detailed information.
>>
>> Please let me know what happens.
>>
>> Lixing Gu
>> ----- Original Message ----- 
>> From: "ooikoonbeng2004" <kooi@...>
>> To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
>> Sent: Monday, February 19, 2007 6:59 AM
>> Subject: [EnergyPlus_Support] Vertical Stack to induce natural
> ventilation
>>
>>
>> > Dear all,
>> >
>> > i was asked whether i can simulate the natural ventilation in a
>> > vertical stack that has been painted black, installed to induce
> such
>> > (natural ventilation) on a building in the tropics.
>> >
>> > i looked through (hopefully i have not missed anything) the
>> > documentation on Airflow Network but the openings of doors and
> windows
>> > are oriented ninety degrees from the above.
>> >
>> > Many thanks and with loving kindness,
>> > ooi
>> >
>> >
>> >
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>> >
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> and press
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>> >
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>> >
>> >
>> >
>> >
>>
>
>
>
>
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