RE: [EnergyPlus_Support] Natural ventilation

["Mahabir Bhandari" <bhandari@xxxxxxxxxxxxxxxx>]

David,

My previous message was not displayed correctly due to HTML format.  I am
sending it again here..
 

You may also find DesignBuilder very helpful in this case. It is very easy
to define natural ventilation in DesignBuilder. 

 
In DesignBuilder, natural ventilation can either be 'Scheduled' or
'Calculated'

1. Scheduled - the ventilation rates are predefined using a maximum air
change rate modified by operation schedules. When using Scheduled natural
ventilation, windows, vents, doors and holes in internal partitions can be
modeled by mixing a predefined amount of air from one zone with the adjacent
zone by selecting the Model airflow through internal openings using flow per
unit area option and entering the typical airflow per opening area.

2.      Calculated - the ventilation rates are calculated using wind and
buoyancy-driven pressure, opening sizes and operation, crack sizes etc.
Calculated where natural ventilation and infiltration are calculated based
on window openings, cracks, buoyancy and wind driven pressure differences
crack dimensions etc.

 You should generally use the 'Scheduled' natural ventilation model option
because it is quicker and easier to enter the related model data and also
because the simulations run more quickly.  However if you need to calculate
natural ventilation rates which can be achieved with a particular
configuration then you should use the 'Calculated' option.

You can download a fully functional 30 day trial copy of DesignBuilder from
our website: http://www.designbuildersoftware.com/designbuilder.php

 

Mahabir Bhandari

________________________________________
From: David Barrera [mailto:davidabraham_b@xxxxxxxxx] 
Sent: Monday, November 27, 2006 3:59 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Natural ventilation

I really hope someone can help me:
In my simulation I need to take into acount the
effects of natural ventilation in a room. How can I
define just the space where the air will flow, I mean
the aperture of the window? Can I define a "hole" or
"aperture", I don't know how to say it, as a type of
subsurface on a base surface?
Thank a lot, I'll really wait for your suggestion. 

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