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<p class=MsoNormal><span style='font-size:12.0pt'>Alec –<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>You’re correct, the base
standard did not include regulations for closed circuit cooling towers. This
was clarified by “Addendum a” to the standard.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>However, in early 2008
“Addendum l” added requirements for closed towers, which can be found at the
ASHRAE website - <a href="http://www.ashrae.org/technology/page/132">http://www.ashrae.org/technology/page/132</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
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<p class=MsoNormal style='line-height:150%;text-autospace:none'><b><span
style='font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";
color:gray'>Aaron Dahlstrom , PE, LEED® AP</span></b><o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Alec
Stevens<br>
<b>Sent:</b> Monday, April 12, 2010 5:49 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Closed Circuit CTs<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal>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?<o:p></o:p></p>
<p class=MsoNormal>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. <o:p></o:p></p>
<p class=MsoNormal>If the table is only for open towers, is there a separate
requirement for closed circuit evap coolers?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Sincerely,<br>
Alec Stevens<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>DMI<br>
35 Walnut Street, Wellesley, MA 02481<br>
p: 781 431 1100 x11 f:781 431 1109<br>
e: astevens@dmiinc.com<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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