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<p class="MsoNormal">I’d first consider grouping all restroom zones + the serving corridor zone(s) under a single “corridor” system in your model. This allows ERV inputs specified in one place only, and simplifies specifying heating-only between the system
inputs and control zone(s)’ thermostat schedules for the needed OA pre-conditioning.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Think about whether the restrooms actually received pre-heated corridor air vs. something “more conditioned.” This might not be a perfect fit if the restrooms’ conditioned makeup actually comes from cooled spaces or directly from other
AHU’s… but this would be a starting point in that case and the differential in terms of what’s seen at the ERV might not be meaningful enough to get worked up about.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">You could also go down a path of replicating/weighting ERV inputs between the affected systems instead, but I suspect that would probably end up being much more work than the above alternative for your scenario.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Getting exhaust/relief loads transposed between systems to be seen with ERV is indeed tricky, but an explored path with a destination at least. It entails quantifying the hourly sensible/latent loads you mean to transpose, and spoon-feeding
those loads into a space under the receiving ERV via a “free” hourly process schedule. This is done most commonly I think in concert with the OA-FROM-SYSTEM + “dummy zone” approaches to tackle DOAS that also involves heat recovery equipment, if anyone needs
some search terms to find related threads in the archives.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">~Nick<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#3A7A46"><img width="726" height="9" style="width:7.5625in;height:.0937in" id="Picture_x0020_1" src="cid:image001.png@01D2A7C7.255650F0"><o:p></o:p></span></p>
<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: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"> Regional Energy Engineering Manager<o:p></o:p></span></p>
<p class="MsoNormal"><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"> Schneider Electric</span><span style="color:#1F497D"><o:p></o:p></span></p>
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<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">913.564.6361
</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">785.410.3317
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</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">913.564.6380</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="color:#1F497D"><a href="mailto:nicholas.caton@schneider-electric.com"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469">nicholas.caton@schneider-electric.com</span></a><o:p></o:p></span></p>
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<p class="MsoNormal" align="right" style="text-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="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:4.0pt"><span style="color:#3A7A46"><img border="0" width="722" height="49" style="width:7.5208in;height:.5104in" id="_x0000_i1026" src="cid:image002.png@01D2A7C7.255650F0"><o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Equest-users [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Saaf, Paula via Equest-users<br>
<b>Sent:</b> Tuesday, March 28, 2017 12:35 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Modeling ERVs that use air from multiple zones<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How do you model an ERV that is using exhaust air from toilet exhaust that comes from multiple zones? The toilets are in zones that are associated with different AHUs. The ERV is providing fresh air to a corridor. There is a hot water
coil in the ERV. That’s the only “conditioning” the air gets. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Looking at Nicks sketch in the Energy Recovery Wheel on VAV System – zonal exhaust thread it appears that eQuest cannot use exhaust air from one zone to an ERV that is attached to another zone.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for you input. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="line-height:14.0pt;background:white"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">Best regards<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:14.0pt;background:white"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black">for KEMA Inc<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:14.0pt;background:white"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#003591"><br>
<b>Paula Saaf P.E.</b><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:14.0pt;background:white"><b><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#3F9C35">Engineer, Middletown</span></b><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#3F9C35"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:14.0pt;background:white"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:black"><br>
<a href="mailto:paula.saaf@dnvgl.com">paula.saaf@dnvgl.com</a> <br>
Direct +1 860 3465001<o:p></o:p></span></p>
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