[Bldg-sim] Cooling Tower Approach

[Danielle Bond via Bldg-sim]

In general, a smaller approach means the cooling tower is more efficiently
rejecting heat, i.e. better performance. This overview is pretty good:
http://spxcooling.com/pdf/TR-016.pdf

Best,
Danielle

-- 
Danielle Bond, Ph.D.
Energy Engineer, eCap Network
http://www.ecapnet.com/


On Mon, Jun 19, 2017 at 11:50 AM, Dan Nall via Bldg-sim <
bldg-sim at lists.onebuilding.org> wrote:

> If you input a tower with a lower approach but with the same fan power,
> you would wind up with less annual fan energy consumption, because your fan
> with the lower approach temperature would hit the minimum condenser water
> temperature at a higher wet-bulb temperature, allowing the fan to back off
> more hours of the year.
>
> -----Original Message-----
> From: "Peters, Judith M via Bldg-sim"
> Sent: Jun 19, 2017 11:13 AM
> To: "bldg-sim at lists.onebuilding.org"
> Subject: [Bldg-sim] Cooling Tower Approach
>
> I am looking for tips on how to properly compare tower approach temps.
> Currently, I am comparing a 7 F approach with a 5 F approach.  The tower
> has 4 cells with 44 kW fan energy for each cell and a 10 F range.
>
>
>
> Regardless of control parameters, the program shows less tower energy for
> a smaller approach and I was expecting the opposite.
>
>
>
> Can anyone shed some light on this issue?
>
>
>
> Thank you!
>
>
>
>
>
>
>
> *Judy Peters, PE LEED-AP BEMP*
>
> Energy Modeling Engineer
>
> *Daikin Applied*
>
> 763.553.5155 <(763)%20553-5155>
>
> *judith.peters at daikinapplied.com <judith.peters at daikinapplied.com>* |
> www.DaikinApplied.com <http://www.daikinapplied.com/>
>
>
>
>
>
>
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