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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US">Actually it’s quite confusing within DOE’s help but I think you are wrong Nick. Zonal exhaust does go throught the central heat exchanger.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US">Below is the extract from DOE’s volume that points this out :<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><img width="1390" height="263" id="Image_x0020_2" src="cid:image003.png@01D15CF9.C9D5A910"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US">The last sentence clears it out.
<o:p></o:p></span></p>
<p class="MsoNormal"><b><u><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US">« All exhaust other than exfiltration is assumed to flow throught the ERV. This includes both zonal and central exhaust. »</span></u></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#366092;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#3F3F3F">Patrick</span></b><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#366092"> </span></b><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#3F3F3F">Lapierre</span></b><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#7D7D7D">_ing.</span></b><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#366092"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#A5A5A5">plapierre@bpa.ca<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif">De :</span></b><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>De la part de</b> Nicholas Caton<br>
<b>Envoyé :</b> 1 février 2016 13:51<br>
<b>À :</b> Daniel Knapp <danielk@arborus.ca>; Miles H. Martschink <miles.martschink@rmf.com>; bfountain@greensim.com<br>
<b>Cc :</b> equest-users@lists.onebuilding.org<br>
<b>Objet :</b> Re: [Equest-users] Energy Recovery Wheel on VAV System<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I’m actually wrestling with re-understanding these issues in parallel with you, Miles.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The DOE-2 entry for EXHAUST-FLOW specifies zonal exhaust doesn’t get back to the air handler for exposure to heat recovery equipment at the system
level (<u>I wish it were an option</u>):</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img width="1236" height="570" id="Picture_x0020_16" src="cid:image005.png@01D15CF9.C9D5A910"></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">This diagram illustrates my current understanding/impression of what plays into the exhaust airflow seen for recovery:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img width="650" height="290" id="Picture_x0020_11" src="cid:image006.png@01D15CF9.C9D5A910"></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">This is however the first I’ve heard that zonal exhaust doesn’t actually work into the balance to determine exhaust/relief exposed to energy recovery.
Some parametric tinkering is certainly in order! </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">My immediate thought is to wonder if the zonal EXHAUST-SOURCE (i.e. air handler vs. infiltration) could be playing into that observation? Seems
to fit logic…</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">~Nick</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif;color:#002060">NICK CATON, P.E.</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:#1F497D"><br>
</span><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#561782">Owner</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#561782"> </span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#561782">Caton Energy Consulting</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black"><br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> 306 N Ferrel</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> Olathe, KS 66061</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> office: 785.410.3317</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#561782"><a href="www.catonenergy.com"><span style="color:#561782">www.catonenergy.com</span></a></span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoPlainText"><span lang="EN-US">From: Equest-users [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>] On Behalf Of
<a href="mailto:bfountain@greensim.com">bfountain@greensim.com</a><br>
Sent: Monday, February 01, 2016 11:22 AM<br>
To: Daniel Knapp<br>
Cc: Miles H. Martschink; <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
Subject: Re: [Equest-users] Energy Recovery Wheel on VAV System<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Sadly Daniel, I do not think this is quite correct. In the current version of eQUEST/DOE2.2, if you add zonal exhaust the total amount of heat recovery does not change. I agree that it should -- heat recovery should
go down as zonal exhaust is increased, but eQUEST does not currently do this. I was quite surprised when it was pointed out to me.
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"> A quick parametric test run where zonal exhaust is added will show that the total heat input will not go up when it should and on the ERV report (in the .sim) the amount of recovered heat will not change.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">If however, you set the return fan volume lower than the supply fan volume (on the fan -> flow parameters tab), then the heat recovery capacity will be reduced appropriately.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> Equest-users [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Daniel Knapp<br>
<b>Sent:</b> Monday, February 01, 2016 10:42 AM<br>
<b>To:</b> Miles H. Martschink<br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Energy Recovery Wheel on VAV System</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Zone exhaust is presumed to exhaust directly to the outside without going back to the system, i.e. it is assumed that you are specifying a separate zonal exhaust fan that is not connected to the main VAV system. If you
remove the zone exhaust, the system level exhaust will be determined by the outdoor air fraction of the supply air. This outdoor air fraction will depend on the demand for outdoor air from the zones. i.e. the outdoor air is specified at the zone level, and
determines the outdoor air supply at the system level. <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Hope that helps,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Dan<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">—<br>
Daniel Knapp PhD, P Phys, LEED AP O+M<br>
<a href="mailto:danielk@arborus.ca">danielk@arborus.ca</a><br>
<br>
Energy Efficiency Expert<br>
Arborus Consulting<br>
76 Chamberlain Ave<br>
Ottawa ON K1S 1V9<br>
(613) 234-7178<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">—<br>
Daniel Knapp PhD, P Phys, LEED AP O+M<br>
<a href="mailto:danielk@arborus.ca">danielk@arborus.ca</a><br>
<br>
Energy Efficiency Expert<br>
Arborus Consulting<br>
76 Chamberlain Ave<br>
Ottawa ON K1S 1V9<br>
(613) 234-7178 <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Feb 1, 2016, at 11:28 AM, Miles H. Martschink <<a href="mailto:miles.martschink@rmf.com">miles.martschink@rmf.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hello All,</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">I am trying to model an enthalpy energy recovery wheel on a VAV air handler serving multiple zones, and I cannot seem to get any exhaust air to pass through the
wheel. I have specified the design exhaust loads at the Zonal Level and I have also setup the wheel control sequence using values that others on this forum have posted:</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:-18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt"> <span class="apple-converted-space"> </span></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Operation
= OA Exhaust DT</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:-18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New"">o</span><span lang="EN-US" style="font-size:7.0pt"> <span class="apple-converted-space"> </span></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">DT
= 5 degree F</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:-18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt"> <span class="apple-converted-space"> </span></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Operating
Mode = OA Heat/Cool</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:-18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt"> <span class="apple-converted-space"> </span></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Make
up Air Temp Cntrl = Mixed Air Reset</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-indent:-18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt"> <span class="apple-converted-space"> </span></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Capacity
Control = Bypass OA</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Whenever I run the model I get an error stating, “Energy Recovery ventilator: S1 Sys (VAVS) has an exhaust flow 50% of the supply flow. Performance may be compromised.
OA & Exhaust: 7313. 0.” The total sum of all the Zonal Exhaust Loads in 5505 CFM, and none of this is making it to the wheel. Does anyone have any insight as to what I might be doing wrong here? My end goal is to have the wheel modulate the return airflow
in order to match the Outside Air CFM demand by the VAV system. Any input is greatly appreciated.<span class="apple-converted-space"> </span></span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Thanks,</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif;color:#144C5C">Miles Martschink, Jr</span></b><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif;color:#144C5C">Mechanical Design Engineer</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#144C5C">______________________________<br>
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</span><b><span lang="EN-US" style="font-family:"Calibri",sans-serif;color:#144C5C">RMF Engineering<br>
</span></b><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:#474D4F">Reliability. Efficiency. Integrity.<br>
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</span><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:#474D4F">p: 843.971.9639<br>
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</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a href="https://www.linkedin.com/company/rmf-engineering-inc.?trk=nav_account_sub_nav_company_admin"><span style="text-decoration:none"><image005.png></span></a><a href="https://www.facebook.com/pages/RMF-Engineering/193267750706493?ref=hl"><span style="text-decoration:none"><image006.png></span></a></span><span lang="EN-US"><o:p></o:p></span></p>
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