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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;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></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Eric<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Carol Gardner<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 14, 2010
4:24 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Pasha Korber-Gonzalez<br>
<b><span style='font-weight:bold'>Cc:</span></b> equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] Can't
force pump power to Zero?</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size: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></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>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></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>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></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>that's what I can offer for now.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Pasha<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>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></span></font></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>I’ve got a fairly
simple primary/secondary chilled water system with a waterside economizer
chiller.<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>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></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>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></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>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></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
size=3 color=teal face="Times New Roman"><span style='font-size:12.0pt;
color:teal;font-weight:bold'>GHT Limited<br>
</span></font><font color=black><span style='color:black'>James Hansen, PE, LEED
AP</span></font></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><st1:Street
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style='font-size:7.5pt;color:black'>1010 N. Glebe Rd, Suite 200</span></font></st1:address></st1:Street><o:p></o:p></p>
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w:st="on">VA</st1:State> <st1:PostalCode w:st="on">22201-4749</st1:PostalCode></span></font></st1:place><o:p></o:p></p>
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