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Re: [EnergyPlus_Support] Re: Infiltration affected by gaps between walls?



Thank you. As of now, I'm not using the AFN. I was just wondering about a situation in which there was a gap left between planes due to a mistake in entering of vertices. Would such a gap be recognized, and if yes, would there be air flow through it automatically?

Thanks very much.



On Fri, Jul 20, 2012 at 10:37 AM, Jean marais <jeannieboef@xxxxxxxxx> wrote:
 

Your concern depends on what you are trying to achieve. Using the "simple" infiltration objects, you could define leakage per outdoor bounding walls or per all outdoor bounding areas. Using the more complex AFN the user must manually define all flow paths. There is no automation to calculate the perimeter crack length of windows, doors, walls, etc. DesignBuilder can partly automate the AFN creation and can assign a flow path for each sub-surface element (door/window), as well as some of the controls and managers used in AFNetworks.

When simulating the air flows due to the opening of doors and windows, you'll need to make some sacrifices, assumptions, simplifications.

But if you're only concerned with energy usage due to leakage infiltration, in modern buildings that are mechanically ventilated, then the fraction of energy usage attributed to leakage infiltration is most likely very low, therefore accuracy is of lesser importance here (in my opinion).



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "r2baar" <ritwikraj@...> wrote:
>
> Hi Everyone,
>
> I am a new user, and I am concerned about infiltration changes due to any gaps (even if they are very small) between walls or between a roof and a wall. Is the infiltration only dependent on the effective leakage area, or does it get affected by other "areas" that allow leakage?
>
> Thanks very much.
>
> Ritwik
>




--
Ritwik Raj
Sefaira, Inc.
New York, NY 10003




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