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<p class=MsoNormal><span style='color:#1F497D'>Cassie,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>We have a similar design with
water cooled IT racks, and I’ve had no issue with a dummy system and 0
bhp. The datacenter space is essentially unconditioned other than the CHW
racks, so we don’t have the issue with 2 systems serving one zone.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>On a side note, I’ve been
able to use the system level module WS-ECONO successfully in a VAVS, which I’ve
never been able to do in previous versions of DOE. My understanding was
this was only available to PSZ and PVAVS types. I’m not
getting any bdl errors or overwrites, and I’m getting the savings
expected from an integrated WSE system. Is this a new feature in DOE2.2,
yet they didn’t update the manual?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='color:#1F497D'>From the DOE2.2 Basics Manual<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='color:#1F497D'><img width=821 height=84
id="Picture_x0020_1" src="cid:image003.jpg@01CB04CA.FE953F90"></span><span
style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>Aaron Powers</span></b><span style='font-family:"Arial","sans-serif";
color:#135351'><br>
</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>Project Engineer</span><b><span style='font-family:"Arial","sans-serif";
color:#135351'><br>
</span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:#62B828'>_________________________________</span></b><b><span
style='font-family:"Arial","sans-serif";color:#62B828'><br>
</span></b><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>Rumsey</span></b><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:black'> </span></b><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>Engineers</span></b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'> |<b> Integral Group</b></span><span style='font-size:12.0pt;
font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.0pt;font-family:"Arial","sans-serif";
color:gray'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>99 Linden Street, Oakland CA 94607</span><span style='font-size:
8.0pt;color:#1F497D'><br>
</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>510 663 2070 x 207</span><span style='font-size:7.0pt;font-family:
"Arial","sans-serif";color:gray'><br>
<br>
</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'><a href="mailto:apowers@rumseyengineers.com"
title="blocked::blocked::mailto:clemon@rumseyengineers.com
mailto:clemon@rumseyengineers.com"><span
style='color:gray;text-decoration:none'>apowers@rumseyengineers.com</span><span
style='color:gray;text-decoration:none'><br>
</span></a><a href="http://www.rumseyengineers.com/"
title="blocked::http://www.rumseyengineers.com/"><span style='color:gray;
text-decoration:none'>www.rumseyengineers.com</span></a><br>
<a href="http://www.integralgroup.com/"
title="blocked::http://www.integralgroup.com/"><span style='color:gray;
text-decoration:none'>www.integralgroup.com</span></a></span><span
style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#00DFDA'><br>
</span><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:#62B828'>_________________________________</span></b><span
style='font-size:12.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Cassie
Waddell<br>
<b>Sent:</b> Thursday, May 13, 2010 1:47 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Cc:</b> Amit Khanna<br>
<b>Subject:</b> [Equest-users] Water-side Economizers NOT on Airside System?<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>We are designing an integrated
water-side plant to serve cold water directly to IT racks (No air). We’re
projecting that at 65F water temperature, we should get more than 65%
compressor-free cooling. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>The current modeling approach it
to build a dedicated cooling system (chiller, cooling tower, associated loops)
with a direct load placed on the loop. We are having difficulty in determining
whether or not we can model a water-side economizer using this approach because
the water-side economizer is specified within the air system (which we have
none). The issue in eQuest is how to introduce water-side economizer in a
secondary loop that only serves process loads and no zones? Is the correct way
to build a dummy zone and system and zero-out the fan power?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Any ideas?</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>________________________________<br>
Cassie Waddell</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Mechanical Engineer,
LEED® AP</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Arup <br>
560 Mission St, Seventh Floor</span><span style='font-size:12.0pt;font-family:
"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>San Francisco CA
94105<br>
tel: 1 415 946 1660<br>
fax: 1 415 957 9096<a name=QuickMark></a><br>
</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><a
href="mailto:cassie.waddell@arup.com"
title="blocked::mailto:cassie.waddell@arup.com"><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>cassie.waddell@arup.com</span></a><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>www.arup.com</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<pre>____________________________________________________________<br>
Electronic mail messages entering and leaving Arup business<br>
systems are scanned for acceptability of content and viruses<o:p></o:p></pre></div>
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