<div dir="ltr"><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Chris Jones</b> <span dir="ltr"><<a href="mailto:Christopher.Jones@rwdi.com">Christopher.Jones@rwdi.com</a>></span><br>Date: Fri, Oct 21, 2016 at 5:51 AM<br>Subject: RE: [Equest-users] Modeling Reverse Acting TStat EF<br>To: Darryl Kasun <<a href="mailto:darryl.kasun@gmail.com">darryl.kasun@gmail.com</a>>, Nicholas Caton <<a href="mailto:Nicholas.Caton@schneider-electric.com">Nicholas.Caton@schneider-electric.com</a>><br><br><br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Okay, I played with it a bit more. I set the zone supply flow equal to the exhaust flow. I set the economizer to off, minimum OA = 0. I set an exhaust fan to
track supply flow. Now the exhaust fan cycles on when the supply fan cycles on. The supply fan is set with 0 fan kW and the exhaust fan has a typical fan kW. This pretty much mimics the typical reverse acting thermostat controlling an exhaust fan in an electrical
room.<u></u><u></u></span></p><span class="">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Christopher Jones, P. Eng.<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Rowan Williams Davies & Irwin Inc.</span></b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br>
<i>Consulting Engineers & Scientists</i><br>
901 King Street West, Suite 400, Toronto, Ontario, M5V 3H5<br>
<b>T:</b> <a href="tel:%28519%29%20823-1311%20ext%202052" value="+15198231311" target="_blank">(519) 823-1311 ext 2052</a> <u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">M:</span></b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> <a href="tel:%28416%29%20697-0056" value="+14166970056" target="_blank">(416) 697-0056</a>
<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Equest-users [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@<wbr>lists.onebuilding.org</a>]
<b>On Behalf Of </b>Chris Jones via Equest-users<br>
<b>Sent:</b> Friday, October 21, 2016 8:38 AM<br>
<b>To:</b> Darryl Kasun; Nicholas Caton<br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<wbr>onebuilding.org</a></span></p><div><div class="h5"><br>
<b>Subject:</b> Re: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></div></div><p></p>
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I have been playing around with a test case using a PSZ system with cooling capacity = 1. The fans are set off with night cycle on any. The zone outdoor air
is set to 1 cfm. If I use no outdoor air in the zone, the economizer doesn’t kick on. The system fan cycles on for free cooling The space temperatures are maintained. The only issue is that the economizer is variable. In reality, the outdoor air should go
to 100% when the fan cycles on for free cooling. I also can’t figure out how to have the exhaust fan cycle on when the fans cycle on.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Christopher Jones, P. Eng.<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Rowan Williams Davies & Irwin Inc.</span></b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br>
<i>Consulting Engineers & Scientists</i><br>
901 King Street West, Suite 400, Toronto, Ontario, M5V 3H5<br>
<b>T:</b> <a href="tel:%28519%29%20823-1311%20ext%202052" value="+15198231311" target="_blank">(519) 823-1311 ext 2052</a> <u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">M:</span></b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> <a href="tel:%28416%29%20697-0056" value="+14166970056" target="_blank">(416) 697-0056</a>
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Equest-users [<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">mailto:equest-users-bounces@<wbr>lists.onebuilding.org</a>]
<b>On Behalf Of </b>Darryl Kasun via Equest-users<br>
<b>Sent:</b> Thursday, October 20, 2016 3:10 PM<br>
<b>To:</b> Nicholas Caton<br>
<b>Cc:</b> equest-users<br>
<b>Subject:</b> Re: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hi everyone,<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Have these systems modeled now that they are showing unmet clg hours and the exhaust fans are turning on when temp is above 80F.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Here's a summary of the inputs required to achieve:<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">- fan schedule at BOTH system and zone level to be set to always off (0)<u></u><u></u></p>
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<p class="MsoNormal">- night cycle fan control set to "cycle on any"<u></u><u></u></p>
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<p class="MsoNormal">- clg rate very low (1 btu/hr)<u></u><u></u></p>
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<p class="MsoNormal">- clg t-stat required <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Thanks again everyone for your help.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Darryl<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Wed, Oct 19, 2016 at 1:08 PM, Darryl Kasun <<a href="mailto:darryl.kasun@gmail.com" target="_blank">darryl.kasun@gmail.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">I do have a clg t-stat schedule set at 80F for all hours. I have tried changing the fan schedule to undefined and to on for all hours and am still met with the fan not turning on at all. The original fan schedule to keep the fan off had
zeros for all hours.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">How to I check the custom hourly output reporting?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Wed, Oct 19, 2016 at 12:43 PM, Nicholas Caton <<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-<wbr>electric.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Immediate thought: Have you set a cooling thermostat schedule for the zone with 80F at all hours? That would explain
both the lack of unmet hours and no calls for conditioning (fan operation).</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">If there is a thermostat schedule, did you confirm the fan is never operating via custom hourly output reporting?
Do you have a system fan schedule forcing OFF behavior with zeroes and/or -1’s? If so, try forcing ON with 1’s and/or just not defining a fan schedule at all to permit system fan operations when called for.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#3a7a46"><img border="0" width="722" height="9" id="m_581864663210287039m_-3145569148700591424m_4948115073328036147Picture_x0020_1" src="cid:image001.png@01D22B78.44F480B0"></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#3a7a46">Nick Caton, P.E., BEMP</span></b><u></u><u></u></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"> 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><u></u><u></u></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"><a href="tel:913.564.6361" target="_blank">913.564.6361</a>
</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"><a href="tel:785.410.3317" target="_blank">785.410.3317</a>
</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="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="mailto:nicholas.caton@schneider-electric.com" target="_blank"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">nicholas.caton@schneider-<wbr>electric.com</span></a></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">F </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469"><a href="tel:913.564.6380" target="_blank">913.564.6380</a></span><u></u><u></u></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3a7a46"><img border="0" width="722" height="49" id="m_581864663210287039m_-3145569148700591424m_4948115073328036147Picture_x0020_3" src="cid:image002.png@01D22B78.44F480B0" alt="cid:image001.png@01D189AB.58634A10"></span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<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""> Darryl Kasun [mailto:<a href="mailto:darryl.kasun@gmail.com" target="_blank">darryl.kasun@gmail.com</a><wbr>]
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<b>Sent:</b> Wednesday, October 19, 2016 1:18 PM</span><u></u><u></u></p>
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<b>To:</b> Nicholas Caton <<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-<wbr>electric.com</a>><br>
<b>Cc:</b> Brian Fountain <<a href="mailto:bfountain@greensim.com" target="_blank">bfountain@greensim.com</a>>; Julien MARREC <<a href="mailto:julien.marrec@gmail.com" target="_blank">julien.marrec@gmail.com</a>>; equest-users <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<wbr>onebuilding.org</a>><br>
<b>Subject:</b> Re: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Hi everyone,<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Thanks again for all your input.<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">I've run into a snag. I cannot seem to get the fan to turn on when the temp > 80 degF. When I look at some of the reports I see that there is no reported unmet clg hours for this
zone which is a red flag - not sure why this is. There is a sizable clg load in this zone: 65 MBH. I do see on the SS-F that the max zone temp hits 86.1 degF. Any thoughts?<u></u><u></u></p>
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<p class="MsoNormal">On Tue, Oct 18, 2016 at 4:00 PM, Nicholas Caton <<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-<wbr>electric.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Hey Darryl,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">This turned into a big response, but it seems the problem we’re trying to help solve is a moving target!</span><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742msolistparagraph">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742msolistparagraph">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">1.</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">The advice to enter something nominal but tiny for cooling capacity, to avoid autosizing & prevent airstream cooling, is based on the earlier statement that you do not intend to cool the
airstream making up the exhaust. Going the other route of just making it “free cooling” (EIR=0) goes against your goal of modeling reality as now the exhaust “makeup” airstream is being conditioned on its way in, resulting in milder interior temperatures
for determining hourly zonal heat transfers. An equally viable alternative I generally prefer to “lock out” cooling operations by the way is an airside system COOLING-SCHEDULE with hourly values of zero. An expected side effect of of crippling/breaking your
PSZ’s cooling capacity with a tiny number is that you will end up with a justifiable quantity of unmet cooling hours – so expect & make note of that swing in unmet hours so you can quantify & parse it out later for your own QC/documentation.</span><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742msolistparagraph">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">2.</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Based on the reference help entries, I’m concerned the night-cycle-ctrl inputs are intended specifically for the inverse case only (reacting only to provide heating when the system is
off. I think the effect you’re looking for (turning on only when thermostat calls request it) can be achieved for PSZ by simply not defining a fan schedule (right-click, default that dropdown field).
<u>Either way</u>, you can & should check/verify intended system operation via custom hourly reports for the associated system & control zone – include hourly zone temperatures, associated tstat setpoints, and something like fan operation/cfm to verify if the
system is only operating when intended.</span><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742msolistparagraph">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">3.</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I’m not certain zonal exhaust inputs are necessary at all if you are modeling a 100% OA PSZ, but be cautious you aren’t ending up unintentionally “double-counting” fan energies between
your PSZ fan power inputs and your zonal exhaust power inputs (or lack thereof). I think you can “zero out” the zonal kW/cfm or else make it a very tiny number if you do decide zonal exhaust inputs are needed.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Ah… The fact you intend to model hot water unit heaters probably throws a wrench into the advice/discussion so
far…</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">“Furnace” generally implies gas combustion heating in doe2/eQUEST. That’s not what you want for hot water heating.
</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">If it’s fair to assume the space is well-mixed during heating scenarios (i.e. not much stratification), then you
can probably get by with accounting for the associated unit heater by specifying hot water baseboards with appropriate heating capacity in the zone. Have them controlled by a heating temperature schedule (sounds like you want this set to 60F all the time).
You might want to specify the associated loop and boilers/meters first so that you can assign those in the same step. Downside to layering in baseboards as an approach is the unit heater fan energies won’t get picked up explicitly – the heat those contribute
will instead be supplied by the HHW loop, and the energies associated with their fan operations for air circulation will not be picked up automatically. You could layer that in however (if it’s pertinent) by doing an hourly report to identify when baseboards
are in operation (delivering heat), then assigning that to the space as an equipment load, capturing the heat contributions and electricity consumption.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">If accounting for exhaust and unit heater fan energies operations separately/distinctly is a major priority… you’ll
probably need to re-think the broader approach & system type selection. UHT is an attractive option for picking up unit heater operations explicitly and clearly on its own, but that system type affords no capacity to handle OA/exhaust. You’d either need
to accomplish the exhaust/damper operations at the zonal level (spoon-feeding expected operations as a fractional or ON/OFF schedule since we’ve established thermostat schedules are not presently an option). You could alternatively pair UHT’s with an airside-system-based
approach to the exhaust/damper operations (like the PSZ we’ve been discussing) if you split your zone/spaces geometrically to afford separations to assign different systems to, thermally connected with airwalls. Advantage to this approach is the flexibility
to separate the conditioned volume if air mixing is not going to be stellar (stratification expected) during heating.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Hope this helps steer the ship!</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">~Nick</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#3a7a46"><img border="0" width="722" height="9" id="m_581864663210287039m_-3145569148700591424m_4948115073328036147m_6327899406731807742Picture_x0020_1" src="cid:image001.png@01D22B78.44F480B0"></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#3a7a46">Nick Caton, P.E., BEMP</span></b><u></u><u></u></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"> 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><u></u><u></u></p>
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<td width="291" valign="top" style="width:218.3pt;padding:0in 0in 0in 0in">
<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"><a href="tel:913.564.6361" target="_blank">913.564.6361</a>
</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"><a href="tel:785.410.3317" target="_blank">785.410.3317</a>
</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="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="mailto:nicholas.caton@schneider-electric.com" target="_blank"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">nicholas.caton@schneider-<wbr>electric.com</span></a></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">F </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469"><a href="tel:913.564.6380" target="_blank">913.564.6380</a></span><u></u><u></u></p>
</td>
<td width="203" valign="top" style="width:152.4pt;padding:0in 0in 0in 0in">
<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><u></u><u></u></p>
</td>
</tr>
<tr style="height:4.0pt">
<td width="724" colspan="3" valign="top" style="width:543.0pt;padding:0in 0in 0in 0in;height:4.0pt">
<p class="MsoNormal">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3a7a46"><img border="0" width="722" height="49" id="m_581864663210287039m_-3145569148700591424m_4948115073328036147m_6327899406731807742Picture_x0020_3" src="cid:image002.png@01D22B78.44F480B0" alt="cid:image001.png@01D189AB.58634A10"></span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
<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""> Darryl Kasun [mailto:<a href="mailto:darryl.kasun@gmail.com" target="_blank">darryl.kasun@gmail.com</a><wbr>]
<br>
<b>Sent:</b> Monday, October 17, 2016 1:26 PM<br>
<b>To:</b> Nicholas Caton <<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-<wbr>electric.com</a>><br>
<b>Cc:</b> Brian Fountain <<a href="mailto:bfountain@greensim.com" target="_blank">bfountain@greensim.com</a>>; Julien MARREC <<a href="mailto:julien.marrec@gmail.com" target="_blank">julien.marrec@gmail.com</a>>; equest-users <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<wbr>onebuilding.org</a>></span><u></u><u></u></p>
<div>
<div>
<p class="MsoNormal"><br>
<b>Subject:</b> Re: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
<div>
<p class="MsoNormal">Hi everyone - thank you so much for the replies. Just wanted to provide as a summary as to what I've modeled thus far - pls comment if you have any:<u></u><u></u></p>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u>SYSTEM LEVEL:</u><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Modeled the reverse acting t-stat system as a PSZ with the following inputs at the system level:<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Control zone is the zone the supply fan serves<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Supply fan kW/CFM equals that of the EF<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Delta T across supply fan = 0<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Supply fan schedule is on/off type with default off for all hours<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Night Cycle Control: On Any<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- min outside air ratio = 1.0<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- CLG Cap left blank<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- EIR = 0<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u>ZONE LEVEL:</u><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- HTG/CLG design temps are 60/80 degF;<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- E/A control is "No Airflow Tracking"<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- E/A flow matching the flow of the EF (11,000 CFM)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- E/A source: infiltration<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Max clg rate left blank<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u>QUESTIONS REMAINING:</u><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- Can I simply leave the CLG capacity to be auto-sized? Brian you had mentioned to put in a minimal value for this input but I do not understand why.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">- This zone also has HW UHs serving it - how to I implement them? I see at the system level there's an option for the Zone Heat Source to be furnace which provides the opportunity
to account for a UH's fan energy but looks like a furnace cannot be connected to a HW loop. <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> - Any advice of thermostat type?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">Thanks again<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">Darryl Kasun<u></u><u></u></p>
</div>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
<div>
<p class="MsoNormal">On Mon, Oct 17, 2016 at 11:04 AM, Nicholas Caton <<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-<wbr>electric.com</a>> wrote:<u></u><u></u></p>
<blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
<div>
<div>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Hey Brian,<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
You’re absolutely right – I should have double-checked before posting. In my mind’s eye, I recalled assigning a temperature schedule to zonal exhaust inputs, but it does appear I misremembered and that isn’t a direct option.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Tricking an airside system as you’re describing into the intended behavior must be how I’ve managed this in the past. A thermostat schedule is minimally needed at the system to define the intended “trigger temperatures,” and one could optionally also specify
a fan schedule to go beyond intermittent and enforce off/on hours as might happen in the real world via tstat + relays.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
~Nick<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#3a7a46"><img border="0" width="722" height="9" id="m_581864663210287039m_-3145569148700591424m_4948115073328036147m_6327899406731807742m_6847876830156294957_x005f_x0000_i1026" src="cid:image001.png@01D22B78.44F480B0"></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-family:"Arial","sans-serif";color:#3a7a46">Nick Caton, P.E., BEMP</span></b><u></u><u></u></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"> 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><u></u><u></u></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"><a href="tel:913.564.6361" target="_blank">913.564.6361</a>
</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"><a href="tel:785.410.3317" target="_blank">785.410.3317</a>
</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" target="_blank"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469">nicholas.caton@schneider-<wbr>electric.com</span></a></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">F </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469"><a href="tel:913.564.6380" target="_blank">913.564.6380</a></span><u></u><u></u></p>
</td>
<td width="203" valign="top" style="width:152.4pt;padding:0in 0in 0in 0in">
<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><u></u><u></u></p>
</td>
</tr>
<tr style="height:4.0pt">
<td width="724" colspan="3" valign="top" style="width:543.0pt;padding:0in 0in 0in 0in;height:4.0pt">
<p class="MsoNormal">
<span style="color:#3a7a46"><img border="0" width="722" height="49" id="m_581864663210287039m_-3145569148700591424m_4948115073328036147m_6327899406731807742m_6847876830156294957Picture_x0020_3" src="cid:image002.png@01D22B78.44F480B0" alt="cid:image001.png@01D189AB.58634A10"></span><u></u><u></u></p>
</td>
</tr>
</tbody>
</table>
<div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
-----Original Message-----<br>
From: Brian Fountain [mailto:<a href="mailto:bfountain@greensim.com" target="_blank">bfountain@greensim.com</a><wbr>]
<br>
Sent: Monday, October 17, 2016 9:55 AM<br>
To: Nicholas Caton <<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-<wbr>electric.com</a>>; Julien MARREC <<a href="mailto:julien.marrec@gmail.com" target="_blank">julien.marrec@gmail.com</a>>; Darryl Kasun <<a href="mailto:darryl.kasun@gmail.com" target="_blank">darryl.kasun@gmail.com</a>><br>
Cc: equest-users <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<wbr>onebuilding.org</a>><br>
Subject: Re: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Does this mean the exhaust fan can cycle based on zone temperature? I had thought that the exhaust fan schedule was just on/off, on/off/flag and fraction. That means you have to pre-define the expected schedule rather than having the EF respond to the hourly
space timestep temperature. <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
What we have done in the past is to model the EF as a PSZ with the fan power as the supply fan power and the "indoor fan mode" as intermittent. Cooling capacity set to a small non-zero value (as zero invokes auto-sizing). <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Original Message <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
From: Nicholas Caton via Equest-users<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Sent: Monday, October 17, 2016 10:39 AM<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
To: Julien MARREC; Darryl Kasun<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Reply To: Nicholas Caton<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Cc: equest-users<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Subject: Re: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
From: Nicholas Caton<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Sent: Monday, October 17, 2016 9:38 AM<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
To: 'Julien MARREC' <<a href="mailto:julien.marrec@gmail.com" target="_blank"><span style="color:windowtext;text-decoration:none">julien.marrec@gmail.com</span></a>>; Darryl Kasun <<a href="mailto:darryl.kasun@gmail.com" target="_blank"><span style="color:windowtext;text-decoration:none">darryl.kasun@gmail.com</span></a>><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Subject: RE: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Yep - Julien has the right idea!<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
The other input of interest for your case is that at the same input screen, you can select the exhaust source as "infiltration," which means the associated makeup airstream = outside conditions.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
~Nick<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Nick Caton, P.E., BEMP<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Senior Energy Engineer<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Energy and Sustainability Services<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Schneider Electric<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
D <a href="tel:913.564.6361" target="_blank">913.564.6361</a><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
M <a href="tel:785.410.3317" target="_blank">785.410.3317</a><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
E <a href="mailto:nicholas.caton@schneider-electric.com" target="_blank"><span style="color:windowtext;text-decoration:none">nicholas.caton@schneider-<wbr>electric.com</span></a><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
F <a href="tel:913.564.6380" target="_blank">913.564.6380</a><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
15200 Santa Fe Trail Drive<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Suite 204<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Lenexa, KS 66219<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
United States<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
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<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
-----Original Message-----<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
From: Equest-users [<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank"><span style="color:windowtext;text-decoration:none">mailto:equest-users-bounces@<wbr>lists.onebuilding.org</span></a>] On Behalf Of Julien MARREC via Equest-users<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Sent: Saturday, October 15, 2016 3:41 PM<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
To: Darryl Kasun <<a href="mailto:darryl.kasun@gmail.com" target="_blank"><span style="color:windowtext;text-decoration:none">darryl.kasun@gmail.com</span></a>><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Cc: equest <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank"><span style="color:windowtext;text-decoration:none">equest-users@lists.<wbr>onebuilding.org</span></a>><u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Subject: Re: [Equest-users] Modeling Reverse Acting TStat EF<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Zonal exhaust fan has an option to control that on a temp schedule if I recall correctly.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Open the zone, tab "outside air" then at the right you can specify a zonal exhaust fan. (All this from memory so might differ slightly)<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Cheers,<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Julien<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
Envoyé de mon iPhone<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> Le 15 oct. 2016 à 20:57, Darryl Kasun via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank"><span style="color:windowtext;text-decoration:none">equest-users@lists.<wbr>onebuilding.org</span></a>> a écrit :<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> Hi eQUESTers,<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> First off, you probably will not likely appreciate this and I'll preface this with saying that I'm a total bandwagon jumper but I am okay with that.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> GO JAYS!!!<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> Now that that's out of the way I am trying to model a very simple system that I'm sure many of you have modeled before.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> I have a zone that has an exhaust fan in it. When the temp. reaches above 80 degF, an exhaust fan turns on and a damper opens to draw OA into the zone.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> I've been fooling around with a few systems trying to figure out a good way to model this but haven't come up with one yet.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> Let me know if have any recommendations.<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> Thanks!<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> Darryl<u></u><u></u></p>
<p class="m_581864663210287039m-3145569148700591424m4948115073328036147m6327899406731807742m6847876830156294957msoplaintext">
> <u></u><u></u></p>
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> ______________________________<wbr>_________________<u></u><u></u></p>
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