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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Tom,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Another effect, although less significant
than the economizer, is that the additional pressure drop through the enthalpy
wheel and its associated filters raises the fan power. This additional heat
from the fan and motor is more load on the cooling system.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>_____________________</span></font><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><ns0:PersonName w:insAuthor="Keith Swartz"
w:insDate="2009-08-26T15:00:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2009-08-26T15:00:00Z"><st1:PersonName w:st="on"><font
color=navy><span style='color:navy'>Keith Swartz</span></font></st1:PersonName></ns0:PersonName><font
color=navy><span style='color:navy'>, P.E., LEED AP<br>
Energy Engineer / Senior Project Manager<br>
</span></font><ns0:PlaceName w:insAuthor="Keith Swartz"
w:insDate="2009-08-26T15:00:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2009-08-26T15:00:00Z"><st1:PlaceName w:st="on"><font color=navy><span
style='color:navy'>Energy</span></font></st1:PlaceName></ns0:PlaceName><font
color=navy><span style='color:navy'> </span></font><ns0:PlaceType
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><st1:PlaceType
w:st="on"><font color=navy><span style='color:navy'>Center</span></font></st1:PlaceType></ns0:PlaceType><font
color=navy><span style='color:navy'> of </span></font><ns0:place
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><ns0:State
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><st1:State
w:st="on"><st1:place w:st="on"><font color=navy><span style='color:navy'>Wisconsin</span></font></st1:place></st1:State><br>
</ns0:State></ns0:place><ns0:Street w:insAuthor="Keith Swartz"
w:insDate="2009-08-26T15:00:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2009-08-26T15:00:00Z"><ns0:address w:insAuthor="Keith Swartz"
w:insDate="2009-08-26T15:00:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2009-08-26T15:00:00Z"><st1:Street w:st="on"><st1:address w:st="on"><font
color=navy><span style='color:navy'>455 Science Drive, Suite 200</span></font></st1:address></st1:Street><br>
</ns0:address></ns0:Street><ns0:place w:insAuthor="Keith Swartz"
w:insDate="2009-08-26T15:00:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2009-08-26T15:00:00Z"><ns0:City w:insAuthor="Keith Swartz"
w:insDate="2009-08-26T15:00:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2009-08-26T15:00:00Z"><st1:place w:st="on"><st1:City w:st="on"><font
color=navy><span style='color:navy'>Madison</span></font></st1:City></ns0:City></st1:place><font
color=navy><span style='color:navy'>, </span></font><ns0:State
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><st1:State
w:st="on"><font color=navy><span style='color:navy'>WI</span></font></st1:State></ns0:State><font
color=navy><span style='color:navy'> </span></font><ns0:PostalCode
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><st1:PostalCode
w:st="on"><font color=navy><span style='color:navy'>53711</span></font></st1:PostalCode><br>
</ns0:PostalCode></ns0:place><font color=navy><span style='color:navy'>Phone:
608.238.8276 x123<br>
Fax: 608.238.0523<br>
Email: <a href="mailto:kswartz@ecw.org">kswartz@ecw.org</a><br>
Web: <a href="http://www.ecw.org" title="http://www.ecw.org/">www.ecw.org</a><br>
<br>
</span></font><b><span style='font-weight:bold'><ns0:place
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><ns0:PlaceName
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><font
color=navy><span style='color:navy'>Energy</span></font></ns0:PlaceName><font
color=navy><span style='color:navy'> </span></font><ns0:PlaceType
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><font
color=navy><span style='color:navy'>Center</span></font></ns0:PlaceType><font
color=navy><span style='color:navy'> </span></font><ns0:PlaceType
w:insAuthor="Keith Swartz" w:insDate="2009-08-26T15:00:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2009-08-26T15:00:00Z"><font
color=navy><span style='color:navy'>University<br>
</span></font></ns0:PlaceType></ns0:place></span></b><i><font color=navy><span
style='color:navy;font-style:italic'>Your gateway to sustainable design
training and online education programs.<br>
</span></font></i></span></font><font color=navy><span style='color:navy'><a
href="http://www.ecw.org/university/" title="http://www.ecw.org/university/"><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><span
title="http://www.ecw.org/university/">www.ecw.org/university/</span></span></font></a></span></font><o:p></o:p></p>
</div>
</div>
<div>
<div class=MsoNormal align=center style='margin:0in;margin-bottom:.0001pt;
text-align:center'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><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'> Cam
Fitzgerald [mailto:cam@energyopportunities.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, August 12, 2009
7:22 AM<br>
<b><span style='font-weight:bold'>To:</span></b> 'Tom Lawrence'; equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users]
Enthalpy wheels</span></font><o:p></o:p></p>
</div>
<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><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Tom:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>If you have
economizer controls for your unit, you need to disable the wheel during the
temperate months to reap the benefits of the economizer or your cooling load
WILL go up.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=3
color="#1f497d" face="Times New Roman"><span style='font-size:12.0pt;
color:#1F497D'>Cam S. Fitzgerald, PE, LEED AP<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color="#1f497d" face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=3
color=green face=Arial><span style='font-size:12.0pt;font-family:Arial;
color:green'>Energy Opportunities, LLC</span></font><font color=green><span
style='color:green'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=3
color=green face=Arial><span style='font-size:12.0pt;font-family:Arial;
color:green'>a 7group company</span></font><font color=green><span
style='color:green'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color="#1f497d" face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:#1F497D'>phone: (717) 292-2636 x11</span></font><font
color="#1f497d"><span style='color:#1F497D'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color="#1f497d" face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:#1F497D'>fax: (717) 292-0585</span></font><font color="#1f497d"><span
style='color:#1F497D'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color="#1f497d" face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:#1F497D'>e-mail: <a href="mailto:fitzgerald@sevengroup.com"
title="mailto:fitzgerald@sevengroup.com">fitzgerald@sevengroup.com</a></span></font><font
color="#1f497d"><span style='color:#1F497D'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><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>Tom Lawrence<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, August 11, 2009
2:57 PM<br>
<b><span style='font-weight:bold'>To:</span></b> equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] Enthalpy
wheels<o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>We are trying to
model a building with enthalpy wheel OA energy recovery. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>After completing
the entire model and getting all set up in detailed edit mode, when we add in
an enthalpy wheel for even just one zone, the cooling energy increases.
Heating energy does decrease. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>We tried to:<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>1. Control
sequence of operation for OA exhaust delta enthalpy (also same result if
control when fans on and control by differential T)<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>2. As a test, it
made no difference if it was enthalpy wheel, sensible wheel, enthalpy HX,
sensible HX or heat pipe... same story with cooling increased.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>3. Even with fan
pressure rise set to '0' (no fan energy), cooling increased. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>We have tried a
multitude of combinations and keep getting similar results.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'>Tom Lawrence, Ph.D., P.E., LEED-AP</span></font><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'>Public Service Associate, Faculty of Engineering</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'>Driftmier Engineering Center</span></font><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'>University of Georgia</span></font><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'>Athens, GA 30602</span></font><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'>(706) 542-4322</span></font><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'><a href="mailto:lawrence@engr.uga.edu">lawrence@engr.uga.edu</a></span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
color=navy face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:navy'>"</span></font><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:black'>The only thing you take
with you when you're gone is what you leave behind." - <em><i><font
face=Tahoma><span style='font-family:Tahoma'>John Allston</span></font></i></em></span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'><o:p></o:p></span></font></p>
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