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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Fernando,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The curves look okay to me. I plotted them out for a range of hot water temperatures from 90F to 130F.<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">-<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 plotted the “…39+” curve for the range of entering dry bulb from 40F to 60F.<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">-<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 plotted the ”…39-“ curve for the range of Edb from 20F to 38F.<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">-<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">Both curves show decreasing capacity as the heat pump chiller makes hotter water, which makes sense.<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">-<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">Both curves show decreasing capacity with lower outside air condenser temperatures, which makes sense.<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">-<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 “…39-“ curve shows rapidly decreasing capacity with decreasing condenser temperature below 39F, which makes sense since larger portions of the chiller
heat pump heat is needed to defrost the condenser coils.<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">-<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’m guessing that the curves are normalized to 110F HWT and 44F Edb.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I can share an Excel file I used to generate the curves and chart if anybody wants it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">~Bill<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"><img width="560" height="400" id="Chart_x0020_4" src="cid:image001.png@01D1211F.2E537820"><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"><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:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP
</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:#006600">|</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black"> Pathfinder Engineers & Architects LLP<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="line-height:105%"><b><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="line-height:105%"><b><i><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#002060">T: (585) 698-1956</span></i></b><b><i><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#002060">
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<p class="MsoNormal" style="line-height:105%"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif">bbishop@pathfinder-ea.com</span></a><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">
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Fee and Dividend - simple, effective, and market-based.</span><span style="font-size:11.0pt;line-height:105%;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>
<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: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>Fernando Varela<br>
<b>Sent:</b> Tuesday, November 17, 2015 5:04 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] eQuest heat pump performance curves<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Dear users:</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">I've noticed that eQuest heat pump performance curves:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">ChlrHPAirHeatCap-fHW&39+<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">ChlrHPAirHeatCap-fHW&39-<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">which refer, respectively, to the temperature capacity factor of the heat pump in normal and defrost mode, seem to be exchanged. This is, ChlrHPAirHeatCap-fHW&39+ curve seems to be the defrost mode curve, and
ChlrHPAirHeatCap-fHW&39- the curve regarding to normal mode.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">I've plotted (with fixed condensing temperature) both capacities varying exterior temperature, and observing the results taking the curves in the opposite way as it shoud be (below 39ºF,ChlrHPAirHeatCap-fHW&39+,
and ChlrHPAirHeatCap-fHW&39- above 39ºF ), the resulting HP capacity curve seems more like it should be.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Am I doing something wrong?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Thank you in advance.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;color:black;border:solid windowtext 1.0pt;padding:0in"><img border="0" width="120" height="120" id="Picture_x0020_5" src="cid:image013.jpg@01D1211F.2E537820" alt="Image removed by sender."></span><span style="font-size:13.5pt;color:black"><o:p></o:p></span></p>
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<p><strong><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#00533E">Fernando Varela Díez</span></strong><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:black"><br>
Dpto. Ingeniería Energética - ETSI Industriales<br>
Email: </span><a href="mailto:fvarela@ind.uned.es" target="_blank"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif">fvarela@ind.uned.es</span></a><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:black"><br>
Tlf: 91 398 6468<o:p></o:p></span></p>
<p><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:black">Universidad Nacional de Educación a Distancia (UNED)<br>
C/ Juan del Rosal, 12. Despacho 2.20<br>
Ciudad Universitaria, 28040, Madrid<o:p></o:p></span></p>
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