<font color='black' size='2' face='Arial, Helvetica, sans-serif'>Hello<font size="2"> Bill/James,<br>
<br>
I have a typical situation for DOAS system that serves fresh air (100% OA) to corridor spaces in multifamily building. The DOAS unit is equiped with heat recovery wheel, and uses the exhaust air from apartments, i.e. exhaust from bathroom and kitchen rather than return air from corridor itself. How would i model the system that uses recovered heat from one system to another in the eQUEST.<br>
<br>
Thanks in advance for your help.<br>
<br>
Regards,<br>
Vipul <br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: Bishop, Bill <wbishop@pathfinder-ea.com><br>
To: James Hansen <JHANSEN@ghtltd.com>; equest-users <equest-users@lists.onebuilding.org><br>
Sent: Wed, Dec 15, 2010 10:04 am<br>
Subject: Re: [Equest-users] heat recovery and zone exhaust<br>
<br>
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<div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10.0pt;font-family:Arial;color:navy">James,</span></font></div>
<div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font></div>
<div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10.0pt;font-family:Arial;color:navy">Make sure to NOT enter zonal exhaust flows
if your intention is for the air to return to the ERV. Specifying zonal exhaust
simulates air leaving the zone through a separate exhaust fan (think bathrooms,
kitchens, clothes dryers) and not returning to the air handling unit.</span></font></div>
<div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font></div>
<div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10.0pt;font-family:Arial;color:navy">Regards,</span></font></div>
<div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10.0pt;font-family:Arial;color:navy">Bill</span></font></div>
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<div class="MsoNormal"><b style="mso-bidi-font-weight:normal"><font color="black" face="Franklin Gothic Medium Cond" size="2"><span style="font-size:10.0pt;font-family: ">William</span></font></b><b style="mso-bidi-font-weight:normal"><font color="black" face="Franklin Gothic Medium Cond" size="2"><span style="font-size:10.0pt;font-family: "> Bishop, PE</span></font></b><b style="mso-bidi-font-weight: normal"><font color="black" face="Franklin Gothic Medium Cond" size="2"><span style="font-size:10.0pt;font-family:">, BEMP, LEED<sup>®</sup>
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<div class="MsoNormal"><font color="black" face="Arial" size="1"><span style="font-size: 9.0pt;font-family:Arial;color:black;mso-no-proof:yes">Mechanical Engineer</span></font></div>
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<div class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size:10.0pt; font-family:Tahoma;font-weight:bold">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size:10.0pt;font-family:Tahoma"> <a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a href="mailto:equest-users-bounces@lists.onebuilding.org?">mailto:equest-users-bounces@lists.onebuilding.org</a>] <b><span style="font-weight: bold">On Behalf Of </span></b>James Hansen<br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, December 15, 2010
9:59 AM<br>
<b><span style="font-weight:bold">To:</span></b>
<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> [Equest-users] heat
recovery and zone exhaust</span></font><font face="Times New Roman" size="3"><span style="font-size:12.0pt;font-family:"></span></font></div>
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<div class="MsoNormal"><font face="Calibri" size="2"><span style="font-size:11.0pt"> </span></font></div>
<div class="MsoNormal"><font face="Calibri" size="2"><span style="font-size:11.0pt">I’m
having the typical issues with getting an enthalpy wheel to show appreciable
savings. I’ve adjusted some of the control sequences, and have
managed to show a savings in cooling energy, but I’m getting no heating
savings, which is strange, unless my building is actually asking for cold OA
during the winter because of the rather large internal heat loads (my guess is
that this is true).</span></font></div>
<div class="MsoNormal"><font face="Calibri" size="2"><span style="font-size:11.0pt"> </span></font></div>
<div class="MsoNormal"><font face="Calibri" size="2"><span style="font-size:11.0pt">My
question is whether you HAVE to define zonal exhaust airflow rates to properly
show the savings from heat recovery, or if the program knows that the exhaust
will roughly match the OA delivered to the space? Do I have to turn on
exhaust tracking?</span></font></div>
<div class="MsoNormal"><font face="Calibri" size="2"><span style="font-size:11.0pt"> </span></font></div>
<div class="MsoNormal"><b><font color="teal" face="Arial" size="2"><span style="font-size:11.0pt;font-family:Arial;color:teal;font-weight:bold">GHT
Limited<br>
</span></font></b><b><font face="Arial"><span style="font-family:Arial; font-weight:bold"><font color="black"><span style="color:black">James
Hansen</span></font></span></font><font color="black"><span style="color:black">, PE, LEED AP</span></font></b></div>
<div class="MsoNormal"><b><font color="black" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:black;font-weight:bold">Senior
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