[Bldg-sim] Closed Circuit CTs

[Dahlstrom, Aaron]

Alec -

You're correct, the base standard did not include regulations for closed circuit cooling towers. This was clarified by "Addendum a" to the standard.

However, in early 2008 "Addendum l" added requirements for closed towers, which can be found at the ASHRAE website - http://www.ashrae.org/technology/page/132

Aaron Dahlstrom , PE, LEED(r) AP
In Posse - A subsidiary of AKF| 1500 Walnut Street, Suite 1414, Philadelphia, PA 19102
d: 215-282-6753| m: 267-507-5470| In Posse: 215-282-6800| AKF: 215-735-7290
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Alec Stevens
Sent: Monday, April 12, 2010 5:49 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Closed Circuit CTs

Hi,
Can anyone shed light on whether evaporative closed circuit cooling towers are required to comply with table 6.8.1G of ASHRAE 90.1 2007?
This table shows the required heat rejection equipment performance in terms of gpm per nameplate horsepower, but it seems to be more applicable to open cooling towers.
If the table is only for open towers, is there a separate requirement for closed circuit evap coolers?

Sincerely,
Alec Stevens

DMI
35 Walnut Street, Wellesley, MA 02481
p: 781 431 1100 x11   f:781 431 1109
e: astevens at dmiinc.com



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