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<p class="MsoNormal">Hi Tom,<o:p></o:p></p>
<p class="MsoNormal">The new DOAS system in eQUEST has cooling, heating and dehumidification capabilities, but can only simulate one wheel. The
<a href="http://maddoxenergy.com/Webinars.htm">presentation by Doug Maddox</a> provides several examples of inputs to use for different configurations. You would need to use some sort of workaround to model the passive dehumidification wheel in a dual wheel
DOAS. A couple ideas:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Model the energy recovery effectiveness of the total energy wheel only, but include the static pressure fan power penalty of both wheels. Simulate the reheat effect of the second wheel
by adding an electric or furnace HEAT-SOURCE at the DOAS, and assign a new meter for the DOAS heating so you can manually subtract the heating energy.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Model the energy recovery effectiveness of the total energy wheel only, but include the static pressure fan power penalty of both wheels. Simulate and record the DOAS cooling energy.
Then model the combined energy recovery effectiveness of the dual wheels with high values of ERV-SENSIBLE-EFF and ERV-LATENT-EFF, and reduce the cooling efficiency iteratively to match the correct cooling energy. (I expect the cooling energy would decrease
when you use the combined effectiveness of the dual wheels, since the wheels are upstream of the cooling coil in the simulation.)<o:p></o:p></li></ul>
<p class="MsoNormal">You can also reach out to Pinnacle and ask them for recommendations on how to capture the energy savings of their DOAS in eQUEST…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">~Bill<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:3.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></b></p>
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(585) 698-1956</span></i></b><b><i><span style="color:#002060"> </span>
</i></b><span style="color:#1F497D"> </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">F: (585) 325-6005<o:p></o:p></span></p>
<p class="MsoNormal"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:blue">bbishop@pathfinder-ea.com</span></a><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> </span><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:blue">www.pathfinder-ea.com</span></a><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">Rochester, NY 14608
<img border="0" width="26" height="23" style="width:.2708in;height:.2395in" id="Picture_x0020_1" src="cid:image005.png@01D50FB5.A09ABB90">
</span><i><span style="font-size:7.0pt;font-family:"Verdana",sans-serif;color:#00B0F0">Ask me why Carbon Fee & Dividend may be right for you.</span></i><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Tom Martin via Equest-users<br>
<b>Sent:</b> Saturday, May 18, 2019 10:27 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Dual wheel DOAS<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Hi All,<o:p></o:p></p>
<div>
<p class="MsoNormal">Has anyone modeled a dedicated outdoor air system with an enthalpy wheel and passive desiccant wheel similar to the attached?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Tom<o:p></o:p></p>
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