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<p class="MsoNormal">Hi Victoria,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This sounds like a good case for utilizing the doe 2.3 engine with the most recent build. I think this will allow you to essentially model your AHU’s as describes as a DOAS, and then to have them “attach” to another airside system which
could explicitly simulate the operations of your unit heaters.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">You would specify DOAS-ATTACHED-TO as CONDITIONED-ZONES to replicate the situation where the two systems are not directly piping air between each other, but instead draw separately from the mixed air of the conditioned space. You might
review the reference entry for DOAS-ATTACHED-TO to see if that prompts you to consider defining a gym ‘plenum’ in further consideration of where these different units exist on the z-axis, in the event it isn’t likely the whole volume is ‘perfectly mixed.’<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">One thought: You might not be able to select and attach a system of type UH to a DOAS, considering UH by it’s doe2 definition doesn’t permit the introduction of ventilation air, but it may be worth a shot. If that doesn’t work, you could
likely define any number of other systems which permit the simple definition of a fan, heating coil, and ventilation air (multiple ways to skin the cat there).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">~Nick<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E., BEMP</span></b><span style="color:#3A7A46"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Senior Energy Engineer</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Regional Energy Engineering Manager<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Energy and Sustainability Services</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Energy Performance Contracting
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<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">913 . 564 . 6361<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">785 . 410 . 3317<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">913 . 564 . 6380<o:p></o:p></span></p>
<p class="MsoNormal"><u><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"><a href="mailto:nicholas.caton@se.com"><span style="font-family:"Calibri",sans-serif;color:#626469">nicholas.caton@se.com</span></a></span></u><span style="font-size:9.0pt;color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">15200 Santa Fe Trail Drive<br>
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<p class="MsoNormal"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Civitillo, Victoria via Equest-users<br>
<b>Sent:</b> Wednesday, June 26, 2019 11:14 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Unit Heaters and RTUs serving the same zone<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><span lang="FR" style="color:red">[External email: Use caution with links and attachments]</span><span lang="FR"><o:p></o:p></span></p>
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<p><span lang="FR"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">I am in the process of modeling a gymnasium that is served by two system types and I’m looking for the best way to model it. RTUs serve the space for cooling and ventilation
purposes while hot water unit heaters supply the heating. The ventilation air from the RTUs tempered to 65degF during the heating months. Trying to figure out if there is a way to model it as a single system? I originally thought I could just mimic the RTU
heating coil as the unit heater heating coil but got a ton of unmet hours. I have taken a powered induction unit with preheat as the approach now which has nixed my unmet hours but skyrocketed my heating energy consumption. Open to suggestions!
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Thanks in advance,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Victoria<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Century Gothic",sans-serif;color:#ED7000">Victoria (Tsamis) Civitillo,
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Sustainability Project Manager<o:p></o:p></span></p>
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</span><span style="font-size:5.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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