<div dir="ltr">Thanks for the input Bill. This is actually very similar to how I have my system set up right now. My issue is that if I have ZONE-HEAT-SOURCE as electric with 18F DT I will get the same exact results as if I have ZONE-HEAT-SOURCE as "Not Installed." My PSZ DOAS is only attached to my dummy space... could this be why?<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Apr 25, 2016 at 5:23 PM, Bishop, Bill <span dir="ltr"><<a href="mailto:bbishop@pathfinder-ea.com" target="_blank">bbishop@pathfinder-ea.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Hi Mike,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">With a PSZ, your ZONE-HEAT-SOURCE will only get applied at your subzones (non-control zone(s)). The heat pump will operate to satisfy both the control zone thermostat
and the humidity requirement based on the RH of the return air. For a DOAS heat pump PSZ serving multiple zones, the supply air temperature at the control zone will vary considerably on a sub-hourly basis as the heat pump cycles between cooling and heating
mode to prevent overcooling the zone, but reheat can be used to keep the SAT to the subzones relatively constant. Give this input a try to get you close to your description:<u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">"DOAS me no questions" = SYSTEM <u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> TYPE = PSZ<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> HEAT-SOURCE = HEAT-PUMP<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> ZONE-HEAT-SOURCE = ELECTRIC<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> MAX-SUPPLY-T = 73<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> MIN-SUPPLY-T = 55<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> MAX-HUMIDITY = 60<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> REHEAT-DELTA-T = 18<u></u><u></u></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">~Bill<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Michael Campbell via Equest-users<br>
<b>Sent:</b> Monday, April 25, 2016 9:17 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] PSZ Dehumidification reheat?<u></u><u></u></span></p><div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hello,<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hoping someone can help me out here. I am modeling a PSZ heat pump with ERV as a DOAS. It is supposed to dehumidify to keep RH below 60%. It appears to be doing this currently based on the hourly reports.
However, I need to also model an electric resistance coil that will reheat the dehumidified air back up to 73F. Does anyone know how I can accomplish this with PSZ? I've tried making "ZONE-HEAT-SOURCE" electric resistance, but this does not seem to have
any effect at all. I also thought about applying preheat to the zones served by the DOAS but it states in the item description that preheat is appled to the mixed air flow, not just outside air so that won't work for me. Any recommendations?<u></u><u></u></p>
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<p class="MsoNormal">Thank you,<u></u><u></u></p>
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<p class="MsoNormal">Mike C<u></u><u></u></p>
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