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<p class="MsoNormal">I believe zonal exhaust can be captured in the relief airstream for ERV, but getting the relief airstream correct means getting a solid enough handle on everything else: return/supply/infiltration/exfiltration.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Following is the last diagram on this matter that I drew up for myself.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m open to comment/corrections, but this answers at least some of your questions, I believe:<o:p></o:p></p>
<p class="MsoNormal"><img width="563" height="433" style="width:5.8645in;height:4.5104in" id="Picture_x0020_2" src="cid:image001.png@01D36A02.0DFC6540" alt="(AV3 ON)
*Wił 'Vr•ez
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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: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>
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</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"><b>From:</b> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Daric Adair via Equest-users<br>
<b>Sent:</b> Thursday, November 30, 2017 4:52 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Run-Around Energy Recovery<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">All;<o:p></o:p></p>
<p class="MsoNormal">Have a project using a run-around loop to recovery sensible energy from laboratory exhaust fans. I have reviewed the archives and my own memory, but this is leaving me scratching my head. I also recall a recent (maybe?) discussion on Zone
vs System exhaust that may directly feed into this - but cannot find it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If the lab hood exhaust is put in at the zone level, eQuest won’t do energy recovery on this air-stream, as zone exhaust goes ‘outside’, yes?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My current thought is to configure the VAV AHU to have either ‘Sensible HX’ or ‘Heat Pipe’ and also have self-contained ERV fans. I’d input the Exhaust fans in as scheduled and then put a low/0 power fan for supply since there really isn’t
such. The OA is moved by the primary supply fan. I’d also calculate a ‘HX power’ or the run-around pump. I’d have 0 zone exhaust; exhaust only at the System level.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can anyone comment on this approach or advise on how to best approach?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">DARIC R ADAIR</span></b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase"> PE,
CEM, BEMP </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><br>
Mechanical Engineer, Energy Analyst <br>
<br>
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