[Equest-users] CT Recirc air and quantifying energy penalty in equest for increased entering WB Temp

[Nikola Kravik]

Hi,
I have a project designed with a WSHP/Fluid cooler where the 2 cell FCooler was put in a "cage of wall" (so neighbors don't hear the sound db's).

Well the sound may be lower, but they have bigger issues with the recirc air and elevated wet bulb around the tower, contractor did measurements and instead of 72F EAWB is about 77F.
95/85 design though with the wet bulb at 77-78F, tower is doing 101/91F+.

I tried to quantify the penalty for the decreased capacity (or the other way around the get savings if we knock the wall and bring the db back to 72F) by playing with the approach temp (from the design 13F to 19F) under the FCooler but that didn't make a difference.

Then I tried the CW loop, elevating the CHW Temp to simulate increased FCooler Leaving supply temp from designed 85F to 90+F and that yield about 100Kwh savings but now sure if this is the right way to do it in equest -has anybody attempted something similar in equest and got justifiable results? Would you recommend doing it some other way in equest?

Thank you,
Nikola


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Nikola Kravik, LEED AP [cid:image001.gif at 01CD64ED.96442ED0]
Project Engineer

Willdan Energy Solutions
6130 Stoneridge Mall Road, Suite 380
Pleasanton, CA 94588
T. 925.416.4200 ext. 1228
D. 925.416.4228
C. 925.719.5883
F. 925.737.0174
nkravik at willdan.com<mailto:nkravik at willdan.com>
www.willdan.com/energy<http://www.willdan.com/energy>

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