[Equest-users] Trouble with thermal process loads in eQUEST

[Adrian Gurga]

Many thanks.  This resolves the issue.  Alternatively if you'd like to avoid
the detailed interface, on that page 21 drop down menu which you mentioned,
the default setting is Natural Gas, with the option to change it to Process
Load.  However, once you change it to Process Load, you can't change it back
to Natural Gas.  It wasn't too much trouble to rebuild the model with all
the correct inputs and make a point not to change that drop down this time.
 Now it works like a charm.

-- 
Adrian Gurga
Smart Energy Design Assistance Center
University of Illinois - Urbana-Champaign
www.sedac.org
(217) 244-4671
(800) 214-7954

On Tue, Aug 24, 2010 at 9:05 AM, Dakota Kelley <dakotak at teliospc.com> wrote:

>  I think there’s a bug in v3.63b which restricts DDW Screen 21, at least
> for the gas side, to process loads.  eQUEST defines process loads as
> internal thermal loads which do not contribute to utility loads, hence your
> observation.  Look at the top of the Load column on Screen 21 and you’ll see
> a drop-down menu that is set to “Process Load”.  I say there’s a bug because
> at one point you could change this menu to “Gas” and it would be a thermal
> and utility load as you desire.  However, it now appears that Process Load
> is the only option.
>
>
>
> The work-around is to go to the applicable zones in the Detailed Interface
> and change the load type from “process” to “gas”.  Refer to the attached
> screen shot.
>
>
>
> Thanks,
>
>
>
>
>
> *DAKOTA KELLEY ***
>
> Project Designer | Energy Analyst
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> *From:* Adrian Gurga [mailto:gurga at illinois.edu]
> *Sent:* Monday, August 23, 2010 5:54 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Trouble with thermal process loads in eQUEST
>
>
>
> Hello,
>
>
>
> I'm trying to add a process load which consumes natural gas in eQUEST.  I'm
> doing it through the Design Development wizard.  I have enabled process
> loads by clicking the Process Loads box on page 15 (non-HVAC enduses to
> model) of the shell editor.  That enables page 21 (process loads and
> profiles).  In this, I can specify electric loads without a problem.  I just
> add in the watts per square foot and the electricity consumption goes up.
>  Perfect.  The trouble is the thermal loads, which are to the right of the
> electrical loads.  First I just tried entering 100 Btuh per square foot but
> left sensible fraction as zero.  Then I ran the model and there was no
> change.  Adding 100 Btuh per square foot has no effect on the natural gas
> consumption in the model.  If I try the same thing but increase the sensible
> fraction it will decrease the energy use in the model because it's assuming
> we get free heating from our process load, which is the opposite of what I
> want because it's assuming that process energy just magically appears in the
> building.  For some reason, adding a process load of X Btuh has no effect on
> the energy consumption.  How do I properly add this load?
>
>
>
> --
> Adrian Gurga
> Smart Energy Design Assistance Center
> University of Illinois - Urbana-Champaign
> www.sedac.org
> (217) 244-4671
> (800) 214-7954
>
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