[Equest-users] defining the windows for natural ventilation

[Daniel Knapp]

It looks like eQuest can simulate infiltration and can simulate the movement of air through open windows into an exterior space using the Sherman-Grimsrud method as pointed out by Paul Diglio.  Maybe this is all you need for your model in which case you are set.  I was more concerned about the fact that eQuest does not calculate the movement of air from zone to zone and is not a good simulation tool for calculating natural ventilation throughout a building.  It looks like it may well be a good tool for calculating natural ventilation in a given room with open windows though.  

Cheers,
Dan

—
Daniel Knapp, PhD, P Phys, LEED® AP O+M
danielk at arborus.ca

Arborus Consulting
Energy Strategies for the Built Environment
www.arborus.ca
76 Chamberlain Avenue 
Ottawa, ON, K1S 1V9 
Phone: (613) 234-7178 ext. 113
Fax: (613) 234-0740




On 2013-04-25, at 11:18 AM, John Aulbach <jra_sac at yahoo.com> wrote:

> So what then is infiltration in eQuest? THAT is separate of the outside air introduced into the HVAC.
>  
> There is the ability to perform rudimentary daylighting. It does ask for minimum footcandles in the data. So it must have SOME idea about natural illumination when the lighting controls step down.
>  
> John Aulbach, PE
> 
> From: "noa at gbwawa" <noa at gbwawa.com>
> To: 'Daniel Knapp' <danielk at arborus.ca> 
> Cc: equest-users at lists.onebuilding.org 
> Sent: Thursday, April 25, 2013 8:07 AM
> Subject: Re: [Equest-users] defining the windows for natural ventilation
> 
> Are you sure about that?
> How about natural lighting? Does it calculate it?
> 
> -----Original Message-----
> From: Daniel Knapp [mailto:danielk at arborus.ca] 
> Sent: Thursday, April 25, 2013 4:59 PM
> To: noa at gbwawa
> Cc: equest-users at lists.onebuilding.org
> Subject: Re: [Equest-users] defining the windows for natural ventilation
> 
> Hi Noa,
> 
> My understanding is that eQuest does not calculate natural ventilation at
> all.  The program is not designed to support calculations of the movement of
> air between zones.  The outdoor air flow in the HVAC window is outdoor air
> introduced by the mechanical system and not through windows.  I think you
> would be better off looking to another tool (maybe EnergyPlus/OpenStudio?)
> that explicitly supports these calculations.
> 
> All the best,
> Dan
> 
> 
> -
> Daniel Knapp, PhD, P Phys, LEEDR AP O+M
> danielk at arborus.ca
> 
> Arborus Consulting
> Energy Strategies for the Built Environment http://www.arborus.ca/
> 76 Chamberlain Avenue
> Ottawa, ON, K1S 1V9
> Phone: (613) 234-7178 ext. 113
> Fax: (613) 234-0740
> 
> 
> 
> 
> On 2013-04-24, at 11:12 AM, noa at gbwawa <noa at gbwawa.com> wrote:
> 
> > Hi all,
> >  
> > I just understood that e-Quest dosn't calculate natural ventilation
> without making some definitions.
> > I found that in the detailed mode, in the HVAC window, I can define the
> outdoor air flow, but how do I define what is the area of the window that
> opens? It could be only half of the window area or all of it for example.
> > So what are the parameters that I need to fill out in order to be exact in
> the natural ventilation definition? And where could I find it?
> >  
> > Thank you
> >  
> > Noa Hakak,
> >  
> > Green building project manager
> > WAWA
> > _______________________________________________
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> 
> 
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