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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>What happens is that a blank (“”) is equivalent to a
zero (it is not an eQuest problem, but rather a programming language problem:
the conversion of the string “” or of the string “0.00”
leads to the same numerical value 0.0). <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>So when you input “0.00” it is like leaving the
field blank, and then eQuest will use the head and the gpm (along with motor
efficiency and mechanical efficiency) to size; and if the head is not input, it
will autosize.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The solution in this case is to input “0.01” or lower.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>______________<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Demba NDIAYE<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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>Eric
Studer<br>
<b>Sent:</b> Thursday, April 15, 2010 7:30 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Can't force pump power to Zero?<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Another trick is to let the pump do whatever it wants, but make a
ghost electric utility meter to handle all the electric end uses that are
included in the model to simulate non-standard systems. The energy use of
the various meters will be reported separately in the PS-F reports, so use the
output from the EM1 when calculating actual project energy use.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Eric<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;color:navy'>Ph:
(781) 431-1100 ext 12<br>
Fax: (781) 431-1109</span><span style='color:navy'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:navy'> </span><o:p></o:p></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'>
<hr size=2 width="100%" align=center>
</div>
<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>Carol Gardner<br>
<b>Sent:</b> Wednesday, April 14, 2010 4:24 PM<br>
<b>To:</b> Pasha Korber-Gonzalez<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Can't force pump power to Zero?</span><o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>I agree with Pasha.
Additionally, you might want to put in a really low number for the pump head.
Maybe try one at a time and then both?<br>
<br>
Carol<o:p></o:p></p>
<div>
<p class=MsoNormal>On Wed, Apr 14, 2010 at 1:05 PM, Pasha Korber-Gonzalez <<a
href="mailto:pasha.pkconsulting@gmail.com">pasha.pkconsulting@gmail.com</a>>
wrote:<o:p></o:p></p>
<div>
<p class=MsoNormal>James. I would suggest trying 0.0001 for your
input. sometimes DOE2 doesn't like an exact 0 number value, so I
typically practice with input values set at 0.001 or as low as I can input with
the value restrictions.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>that's what I can offer for now.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>Pasha<o:p></o:p></p>
</div>
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<div>
<div>
<p class=MsoNormal>On Wed, Apr 14, 2010 at 8:56 AM, James Hansen <<a
href="mailto:JHANSEN@ghtltd.com" target="_blank">JHANSEN@ghtltd.com</a>>
wrote:<o:p></o:p></p>
</div>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;
margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I’ve
got a fairly simple primary/secondary chilled water system with a waterside
economizer chiller.<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I’ve
already got a secondary chilled water pump circulating primary chilled water to
the systems in my proposed building, and it does double duty as pumping through
the heat exchanger in my proposed design. So the chilled water pump that
I’ve set up for the waterside economizer (to regulate maximum flow)
really has Zero power consumption.<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>However,
when I set the KW to 0.00 for this pump, eQuest is STILL auto-sizing something
and forcing the KW to around 32 KW. I even set the efficiencies to 1.0 to
see if that made a difference (doesn’t). I’m not sure if it
has something to do with the warning about the pump not being able to match
system flow at the minimum required head…but why can’t I force this
KW to 0??<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Has
anyone ever run into this? Here’s a screenshot of my input for that
pump and the PV-A output. Thanks in advance!<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='color:teal'>GHT Limited<br>
</span><span style='color:black'>James Hansen, PE, LEED AP</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;color:black'>Senior Associate</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:7.5pt;color:black'>1010 N. Glebe Rd, Suite 200</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:7.5pt;color:black'>Arlington, VA 22201-4749</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:7.5pt;color:black'>703-338-5754 (Cell)</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:7.5pt;color:black'>703-243-1200 (Office)</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:7.5pt;color:black'>703-276-1376 (Fax)</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='color:teal'><a href="http://www.ghtltd.com/" target="_blank"><span
style='font-size:10.0pt'>www.ghtltd.com</span></a></span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='color:#31849B'> </span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><img
border=0 width=634 height=469 id="_x0000_i1025"
src="cid:image001.gif@01CADC7A.80A52D70"><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><img
border=0 width=938 height=73 id="_x0000_i1026"
src="cid:image002.gif@01CADC7A.80A52D70"><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
</div>
</div>
</div>
</div>
<div>
<div>
<div class=MsoNormal align=center style='text-align:center'><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:blue'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>The information contained in this communication is confidential,
may be privileged, and is intended only for the use of the addressee. It
is the property of GHT Limited. Unauthorized use, disclosure or copying
of this communication or any part thereof is strictly prohibited and may be
unlawful. If you have received this communication in error, please notify
me immediately by return e-mail or by e-mail to </span><span style='font-size:
10.0pt;color:black'><a href="mailto:ght@ghtltd.com" target="_blank"><span
style='font-family:"Arial","sans-serif"'>ght@ghtltd.com</span></a></span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>, and
destroy this communication and all copies thereof, including all
attachments. Thank you.</span> <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br>
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</blockquote>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
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