[Equest-users] Baseline Fan power calculation

[Hala Jaber]

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
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