<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial, helvetica, sans-serif;font-size:10pt"><div></div><div>One quick and easy fix is to increase the sizing factor found in the cooling tab. Currently you have it set to 1.15. I tried setting it to 2.0, and there were no more unmet hours. <br> </div>__________________________________________________________<br>Eddie Corwin, Energy & Sustainability Engineer<br>ALTANOVA - www.altanova-energy.com<br>41-41 24th Street - 4th Floor - Long Island City, NY 11101<br><br><div>T: (347) 410-9049<br>E: ecorwin@altanova-energy.com<br><div><br></div><div style="font-family:arial, helvetica, sans-serif;font-size:10pt"><br><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Brad L. Huff
<BradH@BVHis.com><br><b><span style="font-weight: bold;">To:</span></b> "equest-users@lists.onebuilding.org" <equest-users@lists.onebuilding.org><br><b><span style="font-weight: bold;">Sent:</span></b> Tue, October 19, 2010 5:02:26 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [Equest-users] Under sized cooling coil<br></font><br>
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<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">All,</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">I am modeling a portion of a 100% outside air lab in a type
5A climate zone. The area is below ground/has interior walls so there is no
fenestration. The system has two chilled water air handling units and VAV boxes
with zone reheat. The two AHU’s run 24/7 at a constant CFM because the
supply air is driven by a required air change rate per room type. </span></font></p>
<p class="MsoNormal" style="text-indent:.5in;"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">My problem is:</span></font></p>
<p class="MsoNormal" style="margin-left:1.0in;"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">- I have too
many unmet cooling hours when allowing e-Quest to auto-size the cooling coil
capacity of the air handling units</span></font></p>
<p class="MsoNormal" style="margin-left:.5in;"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">Diagnosis:</span></font></p>
<p class="MsoNormal" style="margin-left:1.25in;"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;"><span style="">-<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman";">
</span></font></span></span></font><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">The delta T of the cooling coil
never gets above 7 degrees F any day of the summer.</span></font></p>
<p class="MsoNormal" style="margin-left:1.25in;"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;"><span style="">-<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman";">
</span></font></span></span></font><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">e-Quest severely undersized the
cooling coils from a design day. (I have calculated the design day cooling load
by hand)</span></font></p>
<p class="MsoNormal" style="margin-left:1.25in;"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;"><span style="">-<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman";">
</span></font></span></span></font><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">No warnings in the Sim report</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">I have tried troubleshooting the system for a couple of days
but am unable to find the reason e-Quest is under sizing the cooling coil
capacity. I have attached the .inp file. Any suggestion are greatly
appreciated.</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">Thank you,</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;">Brad</span></font></p>
<p class="MsoNormal" style=""><font size="1" color="gray" face="Arial"><span style="font-size:8.0pt;font-family:Arial;color:gray;">Brad Huff, E.I.T., Mechanical Engineer</span></font><font size="1" color="navy" face="Arial"><span style="font-size:8.0pt;font-family:Arial;color:navy;"> </span></font><strong><b><font size="1" color="navy" face="Times New Roman"><span style="font-size:8.0pt;color:navy;">I </span></font></b></strong><strong><b><font size="1" face="Times New Roman"><span style="font-size:8.0pt;">BVH Integrated
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