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<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'>Thank you for your input. While the sizing
factor did eliminate the unmet hours it did not correct the problem of e-Quest severely
under sizing the system. The problem was related to the weather file and design
conditions e-Quest was using. The weather file was correct for the climate zone
but in examining the LS-C report, the cooling design conditions were 56 F Dry
Bulb in September, far from the realistic design day of 91 F Dry Bulb in June.
To correct this I created both a cooling and heating design day in the “Project
& Site” tab.<o:p></o:p></span></font></p>
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<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'>Brad <o:p></o:p></span></font></p>
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size=1 color=gray face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:gray'>50 Griffin Road South, Bloomfield CT 06002 </span></font><b><font
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color:black;font-weight:bold'>I </span></font></b><font color=navy><span
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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>Eddie Corwin<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, October 19, 2010
5:26 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">equest-users@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] Under
sized cooling coil</span></font><o:p></o:p></p>
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12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>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>
<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>__________________________________________________________<br>
Eddie Corwin, Energy & Sustainability Engineer<br>
ALTANOVA - www.altanova-energy.com<br>
<st1:Street w:st="on"><st1:address w:st="on">41-41 24th Street</st1:address></st1:Street>
- 4th Floor - <st1:place w:st="on"><st1:City w:st="on">Long Island City</st1:City>,
<st1:State w:st="on">NY</st1:State> <st1:PostalCode w:st="on">11101</st1:PostalCode></st1:place><o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>T: (347) 410-9049<br>
E: ecorwin@altanova-energy.com<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><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'> Brad L.
Huff <BradH@BVHis.com><br>
<b><span style='font-weight:bold'>To:</span></b> "<st1:PersonName w:st="on">equest-users@lists.onebuilding.org</st1:PersonName>"
<<st1:PersonName w:st="on">equest-users@lists.onebuilding.org</st1:PersonName>><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</span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>All,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></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><o:p></o:p></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><o:p></o:p></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><o:p></o:p></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><o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>-</span></font><font size=1><span
style='font-size:7.0pt'> </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><o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>-</span></font><font size=1><span
style='font-size:7.0pt'> </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><o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>-</span></font><font size=1><span
style='font-size:7.0pt'> </span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>No warnings
in the Sim report</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></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><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thank you,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Brad</span></font><o:p></o:p></p>
<p class=MsoNormal><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
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size=1 color=gray face=Arial><span style='font-size:8.0pt;font-family:Arial;
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