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RE: [EnergyPlus_Support] Re: AFN - how to set up air tightness of envelope
Jean:
I am curious to know what is your definition of "a real life realistic
infiltration character of the building". Do you know a real building has a
constant infiltration rate of 0.3 ACH?
Lixing
-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jean marais
Sent: Saturday, October 29, 2011 4:34 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: AFN - how to set up air tightness of
envelope
That answer is good, but now I should build in a fan to pressurize my
building to 50 Pa and monitor what volume flow is reported, gradually
increasing the parameter you suggested until the volume flow equals 0.3 ACH
for the building which reflects a realistic building envelope sealing?
I guess what I'm saying is that even with knowing which parameters will
increase or decrease the infiltration rates, I still have no idea how to set
up the system to reflect a real life realistic infiltration character of the
building.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>
> If the AirflowNetwork:MultiZone:Component:DetailedOpening objects are
used,
> you may adjust the values of the Air Mass Flow Coefficient When Opening is
> Closed field.
>
> Hope this helps.
>
> Lixing
>
> -----Original Message-----
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jean marais
> Sent: Thursday, October 27, 2011 2:09 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] AFN - how to set up air tightness of
envelope
>
> Design Builder has generated me a wonderfully large AFN. As default, all
my
> windows are closed all the time.
>
> 1) How do I realistically define an "air tightness" for windows that don't
> open?
> 2) For windows that do open, but are closed.
>
> using AFN object fields such as minimum crack opening factor, etc.
>
>
----------------------------------------------------------------------------
> ---
>
> I'm thinking of increasing the minimum crack width untill my zones are
> reporting infiltration rates of about 0.35 ACH (well sealed building).
> Then I can add extra infiltration by playing with the openable windows and
> their schedules.
>
>
>
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Primary EnergyPlus support is found at:
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The group web site is:
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Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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