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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi Kevin,<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'>I see this kind of warning a lot. The warning usually comes
from the design load calculations, not from the simulation of actual hourly
requirements. As long as the thermal zone in question does not have any (or
minimal) unmet load hours (check your SS-R report), there is no worry. For
code compliance, I would use the SS-R report showing the lack of unmet load
hours as a justification that the unit is in fact not undersized.<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'>I hope this helps. Have a nice day.<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>
<p class=MsoNormal><span style='font-size:10.0pt;color:#76923C'>Sheila Sagerer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#76923C'>Energy
Engineer, EIT, LEED AP<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#76923C'>Energy
Opportunities, Inc, a 7group company<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#76923C'>Phone:
717-880-9069<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#76923C'>www.sevengroup.com<o:p></o:p></span></p>
</div>
<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>Kevin
Kyte<br>
<b>Sent:</b> Monday, August 02, 2010 3:09 PM<br>
<b>To:</b> 'eQUEST Users List'<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] an inadequate cooling capability warning<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"'>I
have been struggling with this scenario. A pump room does not need to
exceed 104F. Lake water is used for cooling. The room is expected
to contain internal loads requiring cooling at almost all times. Below
55F the OA and RA modulate to provide 55F supply air. Above 55F, 100% OA
and the cooling coil turns on. I have the cooling Tstat set to 90F and
cooling coil available at 55F. I am unsure how to even model Below 55F
except for economizing which is not really exact but when I set the economizing
low limit to 55F I get 200F in the space. I have set economizing to 90F
integrated with the coil and no low limit. The cooling coil is rarely
used and not needed in its full capacity yet I am getting inadequate cooling
warnings. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
Min-Supply-T is set to 55F because supply should not be less than this and
hourly reports show acceptable supply temperatures into the mid 70s (I don’t
know if this is acceptable to the program?) I am not using a lake water
chiller because I am not trying to use the same coil temperature. I am
using a simple packaged single zone with the cool-control range set to max and
EIR zero’d because there is enough force off the main header to not need any
pumping through the loop.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>This
is only for energy code compliance and I need an explanation on the
warnings. Other than stating several obvious limitations I don’t really
understand why this warning is occurring. Does anyone have suggestions on
how I may model this system?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
understand that electronic files would help and I will work on that.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thank
you.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoAutoSig>Kevin Kyte, <span style='font-size:10.0pt'>LEED</span><sup><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span></sup><sup><span
style='font-size:10.0pt'>®</span></sup><span style='font-size:10.0pt'> AP<o:p></o:p></span></p>
<p class=MsoNormal><b>Watts Architecture & Engineering, P.C.<o:p></o:p></b></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Shruti'>95 Perry
Street, Suite 300<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Shruti'>Buffalo,
NY 14203<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Shruti'>p: 716.206.5174<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Shruti'>f.:
716.206.5199<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt'>e: <a
href="mailto:kkyte@watts-ae.com">kkyte@watts-ae.com</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt'><a
href="http://www.watts-ae.com/">http://www.watts-ae.com</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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