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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Nick;<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">I believe the curves in the PNNL guide are a copy/match to those in COMnet. I’ve found & avoid these for a couple reasons:<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:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<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">The source of COMnet data is not explicitly clear. They’re any (great) citations in the document. And the ‘Acknowledgements’ section at the front leaves
much to be desired if this is to serve as the references /citations/bibliography section.<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:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<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">The curves are 2 bi-quadratics and a single quadratic. In eQuest the default for a water cooled centrifugal chiller is 3 bi-quadratics. From real chiller
selections and curve data from equipment manufacturers 3 bi-quadratics is what is needed. Describing the relationship of EIR-F(PLR) is complex…<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:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<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 don’t love the eQuest defaults either. It would appear as though they unload unrealistically well compared to ‘real’ chillers.<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:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<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">Semi-related is that EnergyPlus comes with a bunch of Chiller Data performance curves in its DataSet File. Come of the chillers use the 2 bi-quadratic
+ 1 quadratic; others use 3 bi-quadratics, with the 3<sup>rd</sup> bi-quadrates referring to a ‘ReformEIRChiller’ as the curve…would be interested to know what this exactly means…<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">Any resources anyone has & can share are appreciated (ex: HVAC Simulation Guidebook) , but chillers are tricky…I mean ‘fun’…<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:#44546A;text-transform:uppercase"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#44546A;text-transform:uppercase"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#44546A;text-transform:uppercase"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:black;text-transform:uppercase">DARIC R. ADAIR</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
</span><span style="font-size:8.0pt;font-family:"Arial Black",sans-serif;color:black;text-transform:uppercase"> PE, C.E.M.</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
<br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#566C11">Henderson Engineers, Inc. | </span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#566C11">Mechanical Engineer, Energy Analyst</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
<br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;font-variant:small-caps;color:black">dir</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> 913 742 5530
<b><span style="font-variant:small-caps">tel</span></b> 913 742 5000 <b><span style="font-variant:small-caps">fax</span></b> 913 742 5001
<b><span style="font-variant:small-caps">tx id</span></b> #F-001236 <b><span style="font-variant:small-caps">email</span></b> daric.adair@hei-eng.com</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
<a href="http://www.hei-eng.com/"><b><span style="font-size:8.0pt;color:#566C11">www.hei-eng.com</span></b></a>
<br>
</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">Licensed in KS.</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D"> </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: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:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Nicholas Caton via Equest-users [mailto:equest-users@lists.onebuilding.org]
<br>
<b>Sent:</b> Friday, May 5, 2017 5:30 PM<br>
<b>To:</b> Harshul Singhal <hsinghal@psdconsulting.com>; Rathna Shree <rathnashreep@yahoo.in><br>
<b>Cc:</b> equest-users@onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Chiller curves for ASHRAE 90.1 2010<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">IPLV is a functional metric for a consistent, “binary” pass/fail requirement for something resembling part-load performance between manufacturers. IPLV cannot be translated
into a part load performance curve for an energy simulation, however.<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">Here’s a technical recap for those curious/interested:<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" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">IPLV (or NPLV) = 0.01A+0.42B+0.45C+0.12D<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Where:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">A = COP or EER @ 100% Load<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">B = COP or EER @ 75% Load<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">C = COP or EER @ 50% Load<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">D = COP or EER @ 25% Load<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">A, B, C, and D are determined at various operating conditions stipulated by
<a href="https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwj1oNi-3tjTAhVIxCYKHWlbBjwQFggrMAE&url=http%3A%2F%2Fwww.ahrinet.org%2FApp_Content%2Fahri%2Ffiles%2Fstandards%2520pdfs%2FANSI%2520standards%2520pdfs%2FANSI.AHRI%2520Standard%2520550-590%2520(I-P)%2520with%2520Addendum%25203.pdf&usg=AFQjCNEwFDy4kJpL3HbxK4uiL8otyG9RoQ&sig2=yg-KUv7ja0SuR1v_kn_21g">
AHRI 550/590</a>, Section 5.4, Table 3 (page 41 of the linked PDF):<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><img border="0" width="326" height="293" style="width:3.3958in;height:3.052in" id="Picture_x0020_3" src="cid:image001.png@01D2C805.23240300"><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">You can’t take a prescribed IPLV of, say, 13.0 and turn that into knowledge of what efficiency your chiller should reflect at 100% or 75% loading conditions. Even if an ASHRAE
standard or a manufacturer publishes those part load factors, you still are going to have conditions in reality (and your simulations) where it isn’t always 65 degrees outside while you’re 50% loaded (for example)… the major message/takeaway here is that IPLV
was made to marry manufacturers and laboratory conditions, to the general benefit of specifiers and prescriptive standards, not for us in the simulation world.
<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">That’s not to say IPLV can’t be made useful... Someone could (if so inclined) built a “AHRI chiller test bed” model to try and replicate AHRI lab conditions for your simulated
chiller. Custom hourly reports alongside a weather file coving the full range of AHRI conditions to “backtrack” the effective IPLV of a simulated chiller to see how closely the selected library or your own custom curves come to replicating the IPLV prescribed/tested.
If I had such a “test bed” model on-hand I’d share it with the community here, but I haven’t invested time to pursue that concept to completion yet.<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">After some spot checking I observe the baseline curves in the cited PNNL reference link below do NOT match up with at least one set of library curves in eQUEST (the one that
came with v3.65 b7163 anyway)… they might match exactly elsewhere… has anyone done the legwork to assess what equipment/research was used to develop those curves in relation to the eQUEST curve library? They might be generally preferable as a default if they’re
built from trustable and better/more current sources, and if so I’d be inclined to transpose into a custom library file (and possibly share with the community thereafter)…<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"><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#3A7A46"><img border="0" width="726" height="9" style="width:7.5625in;height:.0937in" id="Picture_x0020_1" src="cid:image002.png@01D2C805.23240300"><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., 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>
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"><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 [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Harshul Singhal via Equest-users<br>
<b>Sent:</b> Friday, May 05, 2017 8:17 AM<br>
<b>To:</b> Rathna Shree <<a href="mailto:rathnashreep@yahoo.in">rathnashreep@yahoo.in</a>>;
<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Chiller curves for ASHRAE 90.1 2010<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">I would suggest to use the values from the given reference manual:
<a href="http://www.pnnl.gov/main/publications/external/technical_reports/PNNL-25130.pdf">
http://www.pnnl.gov/main/publications/external/technical_reports/PNNL-25130.pdf</a><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 don’t use eQuest these days but a cross-check will be helpful to generate the correct energy consumption figures.
<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>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Trebuchet MS",sans-serif;color:black">Harshul Singhal
</span></b><b><span style="font-size:8.0pt;font-family:"Trebuchet MS",sans-serif;color:black">LEED AP BD+C, CMVP</span></b><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#5F5E5F">Building Energy Modeling Analyst</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="http://psdconsulting.com/" target="_blank"><span style="color:blue">psdconsulting.com</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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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 [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Rathna Shree via Equest-users<br>
<b>Sent:</b> Friday, May 05, 2017 6:28 AM<br>
<b>To:</b> Equest-users <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
<b>Subject:</b> [Equest-users] Chiller curves for ASHRAE 90.1 2010<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" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black">Dear All,<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black">Can we use the default chiller curves available in Equest while constructing the baseline case using ASHRAE 90.1 2010?</span><span style="font-size:10.0pt;font-family:"Cambria",serif;color:black"> </span><span style="font-size:10.0pt;font-family:Helvetica;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black">Since the IPLV changes from previous ASHRAE standard, is it required to change the part load curve?<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:Helvetica;color:black">Rathnashree<o:p></o:p></span></p>
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