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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Any time I run into heated pools I end up doing something “on the side” of my main energy model.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I can’t help with the Designbuilder-specific steps, but I outlined the process I followed for interior heated pool loads analysis with a contribution to an [equest-users] thread/discussion
last year. Therein I speculated on what extra steps I might take for an exterior roof heated pool. I’ve copied that thread/text below – you might find it instructive to read from the bottom-up.<o:p></o:p></span></p>
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Your procedure would need to diverge at (my) bullet #5 to figure out how to carry your hourly analysis back into a Designbuilder model, if you deem that necessary.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">You might also try reaching out to
</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Rehana Jiffrey (CC’ed here) to see how that particular project turned out. You might get some additional advice/thoughts from someone who has recently tread this path!
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hope that’s helpful!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">~Nick<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E., BEMP</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;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="font-size:11.0pt;font-family:"Calibri",sans-serif;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
</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">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="font-size:11.0pt;font-family:"Calibri",sans-serif;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>
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<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"> Bldg-sim [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Chris Jones via Bldg-sim<br>
<b>Sent:</b> Monday, March 13, 2017 7:47 AM<br>
<b>To:</b> elbahouch_ziat salah eddine <eng.sziat@gmail.com><br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Request for technical guidness<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I am not up to speed on modeling outdoor swimming pools. Forwarded to the bldg-sim group.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#005EB8">Christopher Jones, </span></b><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#005EB8">P.Eng.
</span></b><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#999999">|
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#999999">Senior Energy Analyst</span><span style="font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#999999">RWDI</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#999999"><br>
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Tel: (519) 823-1311 ext 2052<br>
<a href="http://www.rwdi.com/"><span style="color:#999999">rwdi.com</span></a></span><span style="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></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"> elbahouch_ziat salah eddine [<a href="mailto:eng.sziat@gmail.com">mailto:eng.sziat@gmail.com</a>]
<br>
<b>Sent:</b> Sunday, March 12, 2017 8:19 AM<br>
<b>To:</b> <a href="mailto:eng.sziat@gmail.com">eng.sziat@gmail.com</a><br>
<b>Subject:</b> Request for technical guidness<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> My name is Salah Eddine, I am engineer specialized in green building and sustainability working on LEED and energy modeling in Morocco, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> I am working now on the energy modeling of a complex architecture, ( swimming pool + vegetated roof...) under Designbuilder <o:p></o:p></p>
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<p class="MsoNormal"> I would like to ask you about the way how to export a 3D in a GBXML and how to model the thermal load and the water heating system of this swimming pool, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> I would be grateful if you could provide me with some useful tips and guidance.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">sincerely yours <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:7.0pt">RWDI - A Platinum Member of Canada's 50 Best Managed Companies</span></b><span style="font-size:7.0pt">
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<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"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>via Equest-users<br>
<b>Sent:</b> Friday, April 22, 2016 5:06 PM<br>
<b>To:</b> rehana@takasolutions.com; jppatil@gmail.com<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Outdoor swimming pool and heater<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">To “roll your own” savings for pool covers:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">First calculate heating loads sans pool cover measures.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I do not do pools every day, but have also adapted the 2004 Shah method in lieu of ASHRAE Applications approach a few times now (discussed in the link
shared previously by Elizabeth). Note both models are intended for indoor pool applications, so “correctly” adapted/applied to exterior conditions you might get odd results – keep a sharp eye out!
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">b.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">An outdoor heated pool would be a slightly trickier problem to accurately calculate, as you are now dealing with variables sourceable from your weather
file to include air velocity (hourly windspeed – you mentioned rooftop so this might require further processing considering elevation) and a broader range of air conditions (DB temperature + RH),
<a href="https://iridl.ldeo.columbia.edu/dochelp/QA/Basic/dewpoint.html">from which you could derive hourly dewpoint</a>
</span><span style="font-family:Wingdings">à</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">
<a href="http://www.srh.noaa.gov/images/epz/wxcalc/vaporPressure.pdf">saturation pressure for those air conditions</a>, and then also <a href="http://www.engineeringtoolbox.com/water-vapor-saturation-pressure-air-d_689.html">the saturation pressure at the
pool surface</a>. You may also want to consider conductive losses to the environment/ground below the pool depending on the circumstances. I haven’t done it, but it seems like there may be a workable path here (eyeing 2015 ASHRAE Applications equation #1,
specifically).<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">c.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I recommend at minimum reading up on some of the already cited literature, but here’s an open-source/public tool building upon the Shah approach to
if you need to get a fast approximation – be mindful again this is without further edits intended for indoor applications:
</span><span style="font-size:10.0pt;font-family:"Courier New""><a href="http://www.energyideas.org/documents/spreadsheets/IndoorPoolCalc.xls">http://www.energyideas.org/documents/spreadsheets/IndoorPoolCalc.xls</a></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Take a moment to look hard at the pool cover system(s) under consideration. Decide for yourself by what factor that cover system, when deployed, will
reduce evaporation/convection losses (a lot, typically), and radiation losses as well if an insulated variety (I’d estimate this leveraging the hourly weather data + pool temperature profile + cover R-value
</span><span style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">à</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> UAdT). <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Determine a likely profile for cover system deployment – consider whether the system is automated or human-deployed when evaluating your results… if
you are ultimately into “guessing at human behavior” territory here, recognize you shouldn’t spend too much time worrying about the finer nuances for this estimation and should consider presenting your savings as more of a “range.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">With that information at-hand, calculate hourly heating reductions from your “sans cover” calculations.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">To spoon feed back into eQuest:
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Take your before/after hourly heating loads columns,
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">b.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Normalize each to a maximum hourly load (loop process load input for eQuest),
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">c.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Punch them into EMIT to generate annual normalized load profile INP files you can import,
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">d.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Assign those schedules & maximum hourly load to the appropriate eQuest heating loop<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Note if this is already a large model, be mindful EMIT’s 8760 hour fractional schedules can be quite heavy to deal with in multiples – use that tool judiciously
and simplify to averaged daily/weekly/monthly load profiles if it doesn’t make a huge difference ;).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">~Nick<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#3A7A46">------------------------------------------------------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E.</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;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"> Energy and Sustainability Services</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
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</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
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
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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:11.0pt;font-family:"Calibri",sans-serif;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: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="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:4.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#3A7A46"><img border="0" width="722" height="49" style="width:7.5208in;height:.5104in" id="Picture_x0020_3" src="cid:image001.png@01D2A163.9BDE3130" alt="cid:image001.png@01D189AB.58634A10"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></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">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Rehana Jiffrey<br>
<b>Sent:</b> Thursday, March 31, 2016 6:58 AM<br>
<b>To:</b> Jayant Patil<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] Outdoor swimming pool and heater<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks all. Ideas were helpful. <o:p></o:p></p>
<p class="MsoNormal">Now trying to figure out how much energy energy can be saved if a pool cover is installed. It is possible to model this in equest?.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Rehana.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On Mon, Mar 28, 2016 at 8:18 PM, Jayant Patil <<a href="mailto:jppatil@gmail.com" target="_blank">jppatil@gmail.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">I use the methodology described in the below link. It is pretty much close to the ASHARE method and EPA's energy star performance rating technical document.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a href="http://www.rlmartin.com/rspec/whatis/studies_outdoor_inactive.htm" target="_blank">http://www.rlmartin.com/rspec/whatis/studies_outdoor_inactive.htm</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jay<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On Mon, Mar 28, 2016 at 9:14 AM, Elizabeth Gillmor <<a href="mailto:elizabeth@energetics-eng.com" target="_blank">elizabeth@energetics-eng.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">I use bin calcs for this, though I am interested to hear if others have a better way. Total load = losses from evaporation + radiation + convection. Use 8760 data from your weather file to get OA DB, humidity, solar radiation, wind speed
etc. Useful paper with equations here:<o:p></o:p></p>
<p class="MsoNormal"><a href="http://www.mmshah.org/publications/ASHRAE%202014%20Evaporation%20paper.pdf" target="_blank">http://www.mmshah.org/publications/ASHRAE%202014%20Evaporation%20paper.pdf</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">From my bin calcs I get a total annual load in Mbtu/year, then convert that to Mbtu/hr for the days that the pool is open (which averages the load across its operating period), and model that as a process load on a boiler loop with an on/off
schedule ("on" during the open season). It's a relatively OK estimate for a fuel rate that doesn't have a demand charge, but might not be the best way for your electric pool heater if you have a demand charge on your rate.<o:p></o:p></p>
<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
<p class="MsoNormal"><b>Elizabeth Gillmor </b><b><span style="font-size:7.5pt">PE, BEMP, LC, LEED AP</span></b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:18.0pt;font-family:"Arial",sans-serif;color:#38761D;background:white">e n e r g e t i c s </span></b><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#38761D">consulting engineers, llc</span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#666666;background:white"><a href="http://energetics-eng.com" target="_blank">energetics-eng.com</a> |</span><span style="color:#666666"> <a href="tel:303.619.0091" target="_blank">303.619.0091</a></span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On Mon, Mar 28, 2016 at 9:42 AM, Christian Kaltreider <<a href="mailto:ckaltreider@sudassociates.com" target="_blank">ckaltreider@sudassociates.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Rehana,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Estimating the energy consumption of a pool heater can be very tricky. The dominant mode of heat loss
is generally evaporation. Some major influences include activity level of people using the pool (splashing/stirring increases evaporation), wind speeds, and the use of a pool cover. The US DOE has some material on the subject:
<a href="http://energy.gov/energysaver/gas-swimming-pool-heaters" target="_blank">
http://energy.gov/energysaver/gas-swimming-pool-heaters</a> There is a table on this page which I have used to back calculate and extrapolate heating requirements for a specific project as a sanity check.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Also, ASHRAE HVAC Applications 2015 addresses pool heat loss starting on page 5.6. The discussion
is helpful and provides sound calculation methods, but they are more easily applied to indoor pools than outdoor pools.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">That’s all I have at the moment; hopefully you can find some additional resources.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Good luck,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Christian</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Sunayana Jain<br>
<b>Sent:</b> Monday, March 28, 2016 8:23 AM<br>
<b>To:</b> Rehana Jiffrey; <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">
equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Outdoor swimming pool and heater</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Rehana,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">You can model pool heater load on electric meter (see image below) with winter months schedule:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><img border="0" width="557" height="416" style="width:5.802in;height:4.3333in" id="_x0000_i1030" src="cid:image005.jpg@01D2A163.9BDE3130"><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><b><span style="font-family:"Calibri",sans-serif;color:#17109C">Sunayana Jain CEM, LEED AP BD+C</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Rehana Jiffrey<br>
<b>Sent:</b> Saturday, March 26, 2016 11:21 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Outdoor swimming pool and heater</span><o:p></o:p></p>
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<p>Dear All,<o:p></o:p></p>
<p>I'm trying to model an outdoor swimming pool located at the roof top of a residential building. Pool heater (45Kw) operates from December to March (4 months). <o:p></o:p></p>
<p>I was wondering if anyone could help me how to model this scenario, and where to input these consumption values. <o:p></o:p></p>
<p>FYI, this is my first time modeling an outdoor pool and pool heater.<o:p></o:p></p>
<p>Thank you,<o:p></o:p></p>
<p>Rehana.<o:p></o:p></p>
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