<div dir="ltr">Thanks for the reply Nick.  The air will be conditioned by a secondary system.  The system is designed so the DOAS/ERV supplied "neutral" air (~75F) to apartments and the space loads are met by split system heat pumps in the apartments.  So, if the system is dehumidifying, it is possible that the DOAS could supply air at ~60F, and the assumption is that the heat pumps in the apartments will be able to handle that additional load. <br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, May 23, 2016 at 2:04 PM,  <span dir="ltr"><<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-electric.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Mike,<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><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Ref: Volume 2: Dictionary > HVAC Components > SYSTEM > Airside Control > Humidity Control > MAX-HUMIDITY<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><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">To my understanding, no explicit mode of doe2 dehumidification DOESN’T assume some form of reheat to deliver the specified/derived supply air temperature.  In turn, I’m not certain whether it’s going to be easy to (a) force “sub-cooling” without the use of a custom COOL-SET-SCH schedule (that’s where I’d suggest you go next with this), deriving the anticipated additional coil operations from the weather data and/or the model you’ve already built, and (b) transfer that “sub-cooled” air reheating load to the other systems in your model.<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><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Fair question before you dive further:  is the associated reheating going to occur somewhere in the building anyway (i.e. by other systems), and as such would it be a major stretch to simply permit your dummy-zone DOAS perform that reheating?  If that’s a reasonable analysis, you might not need to do anything else.<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><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Of course, presence of ERV just layers on the fun.  Frankly when ERV gets involved, that’s one of my primary drivers for shifting away from a dummy zone approach and approximating the DOAS system (and its ERV components) into the other conditioning systems to more directly capture what’s coming off the exhaust/relief stream.<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><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">~Nick<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><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#3a7a46">------------------------------------------------------------------------------------------------------------------------------<u></u><u></u></span></p><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#3a7a46">Nick Caton, P.E.</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3a7a46"><u></u><u></u></span></p><table style="width:543.0pt;border-collapse:collapse" border="0" cellpadding="0" cellspacing="0" width="724"><tbody><tr><td style="width:172.3pt;padding:0in 0in 0in 0in" valign="top" width="230"><p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">  Senior Energy Engineer</span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br></span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">  Energy and Sustainability Services</span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br></span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">  North America Operations</span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br></span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">  Schneider Electric</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p></td><td style="width:218.3pt;padding:0in 0in 0in 0in" valign="top" width="291"><p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#57b069">D  </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469"><a href="tel:913.564.6361" value="+19135646361" target="_blank">913.564.6361</a> </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br></span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#57b069">M  </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469"><a href="tel:785.410.3317" value="+17854103317" target="_blank">785.410.3317</a> </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br></span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#57b069">E  </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="mailto:nicholas.caton@schneider-electric.com" target="_blank"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">nicholas.caton@schneider-electric.com</span></a></span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br></span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#57b069">F  </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469"><a href="tel:913.564.6380" value="+19135646380" target="_blank">913.564.6380</a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p></td><td style="width:152.4pt;padding:0in 0in 0in 0in" valign="top" width="203"><p class="MsoNormal" style="text-align:right" align="right"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">15200 Santa Fe Trail Drive<br>Suite 204<br>Lenexa, KS 66219<br>United States</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p></td></tr><tr style="height:4.0pt"><td colspan="3" style="width:543.0pt;padding:0in 0in 0in 0in;height:4.0pt" valign="top" width="724"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3a7a46"><img src="cid:image001.png@01D1B4F2.E5C1BE60" alt="cid:image001.png@01D189AB.58634A10" height="49" border="0" width="722"></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3a7a46"><u></u><u></u></span></p></td></tr></tbody></table><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"><u></u> <u></u></span></p><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","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> Wednesday, May 18, 2016 7:37 AM<br><b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><span class=""><br><b>Subject:</b> [Equest-users] DOAS with dehumidification<u></u><u></u></span></span></p></div><p class="MsoNormal"><u></u> <u></u></p><div><div><div><div><div><p class="MsoNormal" style="margin-bottom:12.0pt">Hello,<u></u><u></u></p></div><div><div class="h5"><p class="MsoNormal" style="margin-bottom:12.0pt">I am trying to model a DOAS that supplies conditioned outside air to dwelling units.  It also has an ERV.  I have created a dummy zone with no loads and made the setpoints for the dummy zones my desired heating and cooling supply air temperatures (73F for heating and 75F for cooling).  However, the DOAS also has dehumidification in which it will operate in cooling mode to dehumidify at >60% RH.  There is no reheat coil, so when the system is dehumidifying, the supply air temperature should drop below the setpoint.  <u></u><u></u></p></div></div></div><div><div class="h5"><p class="MsoNormal" style="margin-bottom:12.0pt">Here is the issue I'm having.... when I look at my hourly reports, I can see that the air leaving the cooling coil will drop down to about 60F at times when the system is dehumidifying.  However, the dummy space is still showing a space temperature of ~74F.  How is this possible?  Does anyone have any ideas?<u></u><u></u></p></div></div></div><p class="MsoNormal">Thank you,<u></u><u></u></p></div><p class="MsoNormal">Mike C<u></u><u></u></p></div><p class="MsoNormal"><br>______________________________________________________________________<br>This email has been scanned by the Symantec Email Security.cloud service.<br>______________________________________________________________________<u></u><u></u></p></div></div></blockquote></div><br></div>