[Equest-users] Baseline HVAC Single Zone Furnace Operation.

[Carol Gardner]

Hi Kathryn,

Thanks for sharing your solution to the Georgia project. It sounds like a
really good idea, simple yet effective. It's funny I don't think I would
have thought of using 2 DOAS units, but why not?

WRT to the furnace. My ta

On Wed, Mar 30, 2011 at 1:59 PM, Kathryn Kerns <
kathryn.kerns at bceengineers.com> wrote:

>  Everyone, I may have asked this before, but has anybody run across a
> section of ASHRAE 90.1 or LEED describing the operation of a baseline
> furnace in a PSZ unit? Do we assume the heating modulates or does it stage?
> And if it stages, how many stages? I have been modeling baseline furnace
> heating as modulating since that is what naturally appears in eQuest, but I
> wonder. I know in reality that a lot of small furnace heaters cycle to
> maintain space heat.
>
>
>
> Also, I promised I would share results of my struggle to model
> dehumidification for a project in Georgia. I was sort of successful, I
> think. What I ended up doing was attaching 2 DOAS in series. The first DOAS
> had a cooling only heat pump and the second unit had heating only heat pump.
> The first unit handled the outside air and passed space/return air to the
> second DOAS.  The second unit supplied space/return air to the terminal
> units. This way I got to define set points for the first DOAS cooling supply
> temperature (space/return temperature) and the second DOAS heating supply
> (space/return temperature). The amount of energy consumed and size of each
> unit was adjusted to approximate a horseshoe dehumidification unit. It
> seemed to work.
>
>
>
>
>
>
>
> *Kathryn Kerns*
>
> *Systems Specialist*
>
> *BCE** Engineers, Inc.*
>
> *| Ph: 253.922.0446 | Fx: 253.922.0896 |*
>
>
>
>
>
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-- 
Carol Gardner PE
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