[Equest-users] [Training] Quirk I've wondered about - Fan EIR-fPLR

[The Energy Simulation Academy]

Hey Nick,

In the updated version of eQUEST, most of the descriptions have been
replaced by curves - a more transparent approach, imo.

So, the first field defines the curve. The second field defines that you
are indeed using the curve. This is likely because one method predating the
other as you suggest.

If you select anything else in the lower field, even "variable speed", it
will use one of the historical curves from eQUEST, instead of the default
VAV curve. BTW - the default variable speed curve is different than if you
select "Variable Speed"!

Thanks to your help Nick, and going through almost every new keyword, I
will be going over some of these things in an upcoming 3 hour workshop.
http://energy-models.com/content/equest-doe23-webinar

Best,

Bob
Simulate.Energy
Energy-models.com



On Fri, Feb 28, 2020 at 8:56 AM Nicholas Caton via Equest-users <
equest-users at lists.onebuilding.org> wrote:

> eQuest wizards, if specifying a VAV, will generate systems using a library
> curve and the following 2 lines:
>
>
>
> FAN-CONTROL = FAN-EIR-FPLR
>
> FAN-EIR_FPLR = “Variable Speed Drive FPLR”
>
>
>
> Looks like this in the interface:
>
>
>
> Is there a practical reason this approach is taken in lieu of FAN-CONTROL
> = SPEED?  Does one input option perhaps predate the other?  Do these
> approaches result in different effective curves to describe net
> fan/motor/VSD effects as a function of flow?  Do these approaches perhaps
> interact differently in the presence of a MIN-FAN-RATIO?
>
>
>
> I am being lazy here – but if someone has a slow afternoon, some of these
> open questions would be easy enough to quantify with a dummy model and some
> custom hourlies =).
>
>
>
> ~Nick
>
>
>
> *Nick Caton, P.E., BEMP*
>
>   Senior Energy Engineer
>
>   Energy and Sustainability Services
>   Energy Performance Contracting
>
> D
> M
> E
>
>
> 913 . 564 . 6361
>
> 785 . 410 . 3317
>
> *nicholas.caton at se.com <nicholas.caton at se.com>*
>
> 15200 Santa Fe Trail Drive
> Suite 204
> Lenexa, KS 66219
>
>
>
>
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