[Equest-users] Baseline Fan power calculation

[Hala Jaber]

It works Melissa, have you any toturial for that to share with our
cooperative eQuest users , how does this solve the problem, or if you can
clarify more this.
Appreciate.
Regards,


On Fri, Jan 24, 2014 at 12:20 AM, Melissa Crowe <MCrowe at engsolutions.com>wrote:

> Hala Jaber
>
>
>
> I'll bet if you reduce your supply fan static pressure (to say 1") the
> error will go away...... the problem is fan heat!   Make the AHU a blow thru
> unit!
>
>
>
> [image: Description: Description: Description: Description: Description:
> cid:image003.jpg at 01CCFDCE.40462190]
>
> *Melissa P. Crowe*, LEED AP
> Project Engineer
>
> Engineered Solutions, Inc.
> 6 Union St, Natick MA 01760
> 508.647.9200 x225 (P) l 508.652.1936 (F)
> MCrowe at EngSolutions.com
>
>
>
>
>
> *From:* Hala Jaber [mailto:halajaber82 at gmail.com]
> *Sent:* Wednesday, January 22, 2014 4:44 PM
>
> *To:* James Hansen; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Baseline Fan power calculation
>
>
>
> James,
>
> Do you think that i can set the thermostat set point to 75 for baseline
> only, i think the baseline and proposed design should have the same indoor
> temp, if i can do that this will help since i dont have problem in this
> small amount of saving that may differ.
>
> thank you james.
>
>
>
> On Thu, Jan 23, 2014 at 12:38 AM, James Hansen <JHANSEN at ghtltd.com> wrote:
>
> If it was me, I'd just set the space temperature to 75 degrees, knowing
> that the difference between that and 71.6 degrees probably won't make a
> huge difference in the savings between baseline and proposed.
>
>
>
> I thought I remember seeing something from Jeff Hirsch a while back that
> showed how to de-activate this particular alarm so that the model would
> run??
>
>
>
> GHT Limited
>
> *James Hansen, PE, LEED AP, BEMP*
>
> *Senior Associate*
>
> *1110 N. Glebe Road, Suite 300*
>
> *Arlington, VA 22201*
>
> *703.243.1200 (main)*
>
> *703.338.5754 (direct/cell)*
>
> *www.ghtltd.com* <http://www.ghtltd.com>
>
>
>
> *From:* Hala Jaber [mailto:halajaber82 at gmail.com]
> *Sent:* Wednesday, January 22, 2014 4:30 PM
> *To:* James Hansen; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Baseline Fan power calculation
>
>
>
> Dear James, thank you, but i have already set the warmest rest temp as
> required by section G3.1.3.12 supply air temerature reset, but still  i
> have the problem in the 20 degree difference between the 71.6 and the
> cooling coil supply temp.
>
> I hope if this clarify more my question.
>
>
>
> Hala Jaber.
>
> Sustainable Design Engineer.; LEED AP BD +C .
>
> +962-79-7570197
>
> email: halajaber82 at gmail.com
>
> On Wed, Jan 22, 2014 at 11:57 PM, James Hansen <JHANSEN at ghtltd.com> wrote:
>
> System 8 has a main AHU that feeds parallel fan powered VAV boxes.  For
> your main AHU, you need to make sure your cooling reset temperature for
> supply air (LAT) is set to "warmest".
>
>
>
> GHT Limited
>
> *James Hansen, PE, LEED AP, BEMP*
>
> *Senior Associate*
>
> *1110 N. Glebe Road, Suite 300*
>
> *Arlington, VA 22201*
>
> *703.243.1200 (main)*
>
> *703.338.5754 (direct/cell)*
>
> *www.ghtltd.com* <http://www.ghtltd.com>
>
>
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Hala Jaber
> *Sent:* Wednesday, January 22, 2014 3:56 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Baseline Fan power calculation
>
>
>
> Thanks James,but what do you mean by LAT, in addition to the fact that i
> have modeled the chilled water supply temperature reset as per the
> requirement the rest based on outdoor dry bulb temp using :44 F at 80 f and
> above,  54 f at 60 f and below, so how can i compromise this since the
> actual thermostat cooling set point is 71.6, and i don't have AHU in
> baseline,  its system 8.
> Thanks alot
>
>
>
> --
>
> Hala Jaber.
>
> Sustainable Design Engineer.; LEED AP BD +C .
>
> +962-79-7570197
>
> email: halajaber82 at gmail.com
>
>
>
> On Jan 22, 2014 8:24 PM, "James Hansen" <JHANSEN at ghtltd.com> wrote:
>
> > If your CHW supply temp is 44F, and your LAT setpoint for the AHU is
> 51.6,
> > then you are 6F higher.  Check your reset schedules - if you allow reset
> > for CHW without also allowing reset for the AHU (both per ASHRAE), you
> may
> > have a condition where the CHW supply is within 6 degrees of your LAT.
> >
> >
> >
> > GHT Limited
> >
>
> > *James Hansen, PE, LEED AP, BEMP*
> >
> > *Senior Associate*
> >
> > *1110 N. Glebe Road, Suite 300*
> >
> > *Arlington, VA 22201*
> >
>
> > * 703.243.1200 (main)*
> >
> > * 703.338.5754 (direct/cell)*
> >
> > *www.ghtltd.com* <http://www.ghtltd.com>
>
>
>
> > Hey eQuest users,
> > I have a new challanging  requirement in the appendix G section G3.1.2.8,
> > its required the supply air-to room air cooling temperature difference is
> > 20 degrees for each HVAC system. Now my question is how can i achieve
> this
> > if my baseline is system 8 and the chilled water leaving temperature is
> > specified 44 F with return delta t=12,at the same time that in my design
> > the indoor thermostat temp=71.6 F , and the supply cooling temp should be
> > 51.6F,  here when i set this value i got an error in eQuest stating that"
> > the cooling coil leaving temperatures must be at least 6 F higher than
> > entering water temp" and when i set the cooling supply air temp
>
>
>
>
>
>
>
>
> --
>
> Hala Jaber.
>
> Sustainable Design Engineer.; LEED AP BD +C .
>
> +962-79-7570197
>
> email: halajaber82 at gmail.com
>
>
>
>
> --
>
> Hala Jaber.
>
> Sustainable Design Engineer.; LEED AP BD +C .
>
> +962-79-7570197
>
> email: halajaber82 at gmail.com
>



-- 

Hala Jaber.

Sustainable Design Engineer.; LEED AP BD +C .

+962-79-7570197

email: halajaber82 at gmail.com
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