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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The hydronic heating in the cold duct could be added as a preheat coil an the primary heating in the hot deck set to furnace (in the detailed interface).
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img width="696" height="420" style="width:7.25in;height:4.375in" id="_x0000_i1028" src="cid:image001.png@01D7C00E.A94C8B40"></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Perhaps the above diagram better reflects the system you describe.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The hot water loop control could be set to “Snap” on outdoor air temperature of 60F such that for temperatures above that value the hot water loop would be off.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:8.0pt;line-height:106%"><b><span style="line-height:106%;font-family:"Arial",sans-serif;color:#006298">Footprint<br>
<br>
</span></b><b><span style="font-size:10.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#006298">Brian Fountain<br>
</span></b><span style="font-size:9.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#3D3935">Associate<br>
</span><b><span style="font-size:9.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#006892">d
</span></b><span style="font-size:9.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#3D3935">416 572 8501</span><span style="font-size:9.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#006892"> m
</span><span style="font-size:9.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#3D3935">416 562 6831<o:p></o:p></span></p>
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<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"> fraij <fraij@yahoo.com>
<br>
<b>Sent:</b> Wednesday, October 13, 2021 8:35 AM<br>
<b>To:</b> Brian Fountain <Brian.Fountain@sa-footprint.com><br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Modeling HVAC System in eQuest<o:p></o:p></span></p>
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<p class="MsoNormal">Thanks Brian for the help but what about the gas fired furnace in the heating fan? Is there a way to add it to the system you suggest or the hot water coils will represent all the gas consumed for the space heating and no need to add a
furnace?<o:p></o:p></p>
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<p class="MsoNormal">Regards<o:p></o:p></p>
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<p class="MsoNormal">Ahmad<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#575757">Sent from my Galaxy<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">-------- Original message --------<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">From: Brian Fountain <<a href="mailto:Brian.Fountain@sa-footprint.com">Brian.Fountain@sa-footprint.com</a>>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Date: 13/10/21 11:17 pm (GMT+10:00)
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<p class="MsoNormal"><span style="color:black">To: Ahmad Fraij <<a href="mailto:fraij@yahoo.com">fraij@yahoo.com</a>>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Cc: <a href="mailto:equest-users@lists.onebuilding.org">
equest-users@lists.onebuilding.org</a> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Subject: RE: [Equest-users] Modeling HVAC System in eQuest
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Good morning Ahmed</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The number of mechanical systems available in the eQUEST wizard is a smaller subset of the systems
available in the detailed interface. They are aimed to cover the most typical HVAC systems. Often you will end up making modifications in the detailed interface to more correctly model the system under consideration.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The system you describe is quite innovative with the cooling coming from evaporative coolers.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">My recommendation would be to set your cooling to a more conventional chilled water system. In that
way, the wizard will set up your <i>dual</i> duct VAV system. </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img border="0" width="716" height="519" style="width:7.4583in;height:5.4062in" id="Picture_x0020_1" src="cid:image002.png@01D7C00E.A94C8B40" name="com_samsung_android_email_attachmentprovider_1_25021_RAW_1634128271587"><img border="0" width="721" height="509" style="width:7.5104in;height:5.302in" id="Picture_x0020_2" src="cid:image003.png@01D7C00E.A94C8B40" name="com_samsung_android_email_attachmentprovider_1_25022_RAW_1634128271588"></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">This does however mean that in the detailed interface you will have to disable the chilled water loop
the wizard creates. I would further recommend that you set the dummy chiller to air cooled to prevent the creation of a condenser loop and its ancillary pumps and cooling tower.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Note that eQUEST typically sees evaporative cooling as a precooler rather than primary cooling. That
is why I suggested disabling rather than deleting the chilled water loop. You can set the chilled water pump or the loop availability to an always off schedule. The evaporative precooler will be set to run “Together” with the cooling such that it will carry
the load as far as it can.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img border="0" width="712" height="427" style="width:7.4166in;height:4.4479in" id="Picture_x0020_3" src="cid:image003.png@01D7C00A.5B5286A0"></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Regards,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Brian</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
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<b><span style="font-family:"Arial",sans-serif;color:#006298">Footprint<br>
<br>
</span></b><b><span style="font-size:10.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#006298">Brian Fountain<br>
</span></b><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#3D3935">Associate</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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 <<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>>
<b>On Behalf Of </b>Ahmad Fraij via Equest-users<br>
<b>Sent:</b> Tuesday, October 12, 2021 8:44 PM<br>
<b>To:</b> Fraij via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
<b>Subject:</b> [Equest-users] Modeling HVAC System in eQuest</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">CAUTION: EXTERNAL SENDER
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Hello Guys,</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">I have the following HVAC system for one of the buildings and it is dual duct VAV system:</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"> </span><o:p></o:p></p>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Two cooling fans supply the whole building and each fan has evaporative cooler and a hot water coil after the evaporative cooler. The hot water coil is connected to a boiler and will be abled
once the outside temperature is below 60F to maintain the required supply air temperature in the cooling duct.</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">One heating fan that supply the whole building and this fan has gas fired furnace to maintain the required supply air temperature in the heating duct.</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">The cooling and heating fans are connected to dual duct with dual duct VAV boxes in which the VAV box will mix the cooling air and the heating air to maintain the room temperature.</span><o:p></o:p></li></ul>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">My question is when I select "Evaporative Coolers" as the cooling source in the DD Wizard I don't get hot water
coil as a heating source. I get only "Furnace" or "Electric Resistance". When I select the "Furnace" in the heating source and select "Dual Duct Air Handler with HW Heat" in the system type, no boiler and hot water loop are added to the model and in the "Air-Side
HVAC" tab there will be no furnace symbol but hot water coil.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">This is a bit confusing. Can anybody help me out by advising how can I model the above system in eQuest? The .pd2
and .inp files are attached.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Regards</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Ahmad</span><o:p></o:p></p>
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