[Equest-users] Inquiry Regarding No Energy Usage for Ventilation Outdoor Air

[RobertWichert]

Wow!  This reminds me of some discussions I have had with EnergyPro 
support regarding loads reports.

I use EnergyPro for LEED and Loads and it is also DOE (2.1E) based.  
There is always a hassle making sure that the ventilation loads are in 
the loads reports.  This gives me some clues. Thanks!

EnergyPro does add the ventilation loads in eventually so the Zone and 
System reports reflect those loads.




Robert Wichert P.Eng. LEED AP BD&C
+1 916 966 9060
FAX +1 916 966 9068







===============================================

On 5/21/2013 11:10 AM, Mark Rasmussen wrote:
> Howdy Daniel,
>
> Thank you for the reply, it is very appreciated.
>
> Yes, we know that the ventilation load doesn't show up in any of the
> standard eQuest reports (such as LS-C Building Peak Load Components)
> because they don't show up in the DOE-2.2 engine reports either, which
> are the source of the eQuest reports.
>
> However, our question pertains to the end use Natural Gas Consumption 
> which only
> shows Natural Gas Usage due to losses from Conduction (we verified 
> this by
> manual calculation). The Natural Gas Usage projected by the energy model
> does not include any Natural Gas Usage from the ventilation air (with 
> outdoor air).
>
> Any idea what programming issue could prevent the end use Natural Gas 
> Usage
> from Ventilation with Outdoor Air from being included in the end use 
> analysis?
> I have been trying for a long time, and can't locate the issue. The 
> problem is
> causing an issue with our project timeline now, so I need to get this 
> issue solved
> very soon.
>
> Thanks & Best Wishes!
> Mark
>
> ------------------------------------------------------------------------
> *From:* Daniel Knapp <danielk at arborus.ca>
> *To:* Mark Rasmussen <markfrazz at yahoo.com>
> *Cc:* "equest-users at lists.onebuilding.org" 
> <equest-users at lists.onebuilding.org>
> *Sent:* Tuesday, May 21, 2013 12:56 PM
> *Subject:* Re: [Equest-users] Inquiry Regarding No Energy Usage for 
> Ventilation Outdoor Air
>
> Hi Mark,
>
> The loads report which shows the conduction losses does not include 
> loads from the HVAC systems.  The ventilation load doesn't show up in 
> any of the standard eQuest reports.  This is because eQuest is based 
> on DOE-2.2 which runs in sequence every hour as LOADS -> HVAC -> 
> ECON.  LOADS calculates the loads on every space in the building 
> according to a constant indoor space temperature and the outdoor 
> weather conditions and then passes this information to HVAC which uses 
> it to calculate the required response from the systems.  The load 
> reporting comes out of LOADS before HVAC does its work.  I recommend 
> digging into the DOE-2.2 documentation for more information.
>
> There is probably a way to separate out the ventilation load in the 
> hourly reporting functions.  It's something I'm looking into but 
> haven't figured out yet.  Let me know if you find an easy way to do this.
>
> All the best,
> Dan
>
>
> ---
> Daniel Knapp, PhD, P Phys, LEED® AP O+M
> danielk at arborus.ca <mailto: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 2013-05-21, at 1:13 PM, Mark Rasmussen <markfrazz at yahoo.com 
> <mailto:markfrazz at yahoo.com>> wrote:
>
> > To Whom May Be So Kind,
> >
> > We are currently creating an Energy Model using eQuest for LEED NC v2.2
> > for a facility that will consist of restaurants and a bar/lounge. 
> According to
> > LEED NC v2.2, we need to use a Packaged Single Zone (PSZ-AC)
> > system for the baseline case energy model.
> >
> > Currently, the energy model results for Space Heating only show 
> usage resulting
> > from Conduction Losses and not from Ventilation using Outdoor Air. 
> This is confusing
> > to us, since the SV-A Report in the DOE-2 Engine reports shows 
> Outdoor Air in the
> > system results.
> >
> > Any help to guide us on why the energy usage from Ventilation using 
> Outdoor Air
> > is not showing up in the results / end usage analysis in our energy 
> model would be
> > very appreciated.
> >
> > Thanks & Best Wishes!
> > Mark
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
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