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<p class="MsoNormal">Hi Matt,<o:p></o:p></p>
<p class="MsoNormal">See my previous email copied below which gives more background on VRF heating efficiency.<o:p></o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">~Bill<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<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<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:3.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></b></p>
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(585) 698-1956</span></i></b><b><i><span style="color:#002060"> </span>
</i></b><span style="color:#1F497D"> </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">F: (585) 325-6005<o:p></o:p></span></p>
<p class="MsoNormal"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:blue">bbishop@pathfinder-ea.com</span></a><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> </span><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:blue">www.pathfinder-ea.com</span></a><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">Rochester, NY 14608
<img border="0" width="26" height="23" style="width:.2708in;height:.2395in" id="Picture_x0020_1" src="cid:image003.png@01D65441.DFA6DB30">
</span><i><span style="font-size:7.0pt;font-family:"Verdana",sans-serif;color:#00B0F0">Ask me why Carbon Fee & Dividend may be right for you.<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:7.0pt;font-family:"Verdana",sans-serif;color:#00B0F0"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><b>From:</b> Bishop, Bill <br>
<b>Sent:</b> Wednesday, June 5, 2019 8:44 AM<br>
<b>To:</b> Porter, Frederick NOR <fporter@noresco.com><br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: VRF Heating COP in eQUEST<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi Fred,<o:p></o:p></p>
<p class="MsoNormal">For VRF condensing units in eQUEST, the heating EIR is a function of other variables. You can use the following keyword expression to determine the heating EIR that is used by eQUEST. It can be entered as a user input expression into one
of the other keywords, so you can see how it changes when you change the other variables. (For example, you can enter it as an expression for MIN-UNLOAD-RATIO or MIN-HGB-RATIO, which have default values that are close to the heating EIR, in case you leave
the expression in when you simulate.) You can see all the variables that determine the heating EIR in the expression:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">/* This expression will calculate the heating EIR that DOE-2.3 will use<o:p></o:p></p>
<p class="MsoNormal"> for a VRF condensing unit. You can input this as a user expression<o:p></o:p></p>
<p class="MsoNormal"> in another keyword such as MIN-UNLOAD-RATIO. */<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">#L("COOLING-EIR")*(#LR("EIR-FSST&SDT","COEFFICIENTS",0)<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",1)*#L("HEAT-RATED-SST")<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",2)*#L("HEAT-RATED-SST")**2<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",3)*#L("HEAT-RATED-SDT")<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",4)*#L("HEAT-RATED-SDT")**2<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",5)*#L("HEAT-RATED-SST")<o:p></o:p></p>
<p class="MsoNormal">*#L("HEAT-RATED-SDT"))<o:p></o:p></p>
<p class="MsoNormal">/(#LR("EIR-FSST&SDT","COEFFICIENTS",0)<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",1)*#L("COOL-RATED-SST")<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",2)*#L("COOL-RATED-SST")**2<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",3)*#L("COOL-RATED-SDT")<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",4)*#L("COOL-RATED-SDT")**2<o:p></o:p></p>
<p class="MsoNormal">+#LR("EIR-FSST&SDT","COEFFICIENTS",5)*#L("COOL-RATED-SST")<o:p></o:p></p>
<p class="MsoNormal">*#L("COOL-RATED-SDT"))<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Remember that fan energy should be accounted for when converting rated EER or COP to EIR. Doug Maddox shows how to calculate VRF EIR in this presentation:<o:p></o:p></p>
<p class="MsoNormal"><a href="http://maddoxenergy.com/eQuest_DOE23_VRF.pdf">http://maddoxenergy.com/eQuest_DOE23_VRF.pdf</a><o:p></o:p></p>
<p class="MsoNormal">Cooling EIR for the condensing unit: (3.413/AHRI_EER-0.01138)/(1+0.01138)<o:p></o:p></p>
<p class="MsoNormal">I believe you would reverse the fan energy for heating. Heating EIR = (1/COP+0.01138)/(1-0.01138)<o:p></o:p></p>
<p class="MsoNormal">The constant 0.01138 is the allowance for indoor fan EIR.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Also, I created a modified BDLDialogs.txt file to use with DOE2.3. The file adds these keyword capabilities to the eQUEST interface:<o:p></o:p></p>
<ul type="disc">
<li class="gmail-m-4634787887509830958msolistparagraph" style="mso-list:l0 level1 lfo1">
SYSTEM:RATED-FLOW<o:p></o:p></li><li class="gmail-m-4634787887509830958msolistparagraph" style="mso-list:l0 level1 lfo1">
SYSTEM:HRATED-FLOW<o:p></o:p></li><li class="gmail-m-4634787887509830958msolistparagraph" style="mso-list:l0 level1 lfo1">
SYSTEM:NUM-COOL-STAGES (for PVVT systems)<o:p></o:p></li><li class="gmail-m-4634787887509830958msolistparagraph" style="mso-list:l0 level1 lfo1">
SYSTEM:NUM-HEAT-STAGES (for PVVT systems)<o:p></o:p></li><li class="gmail-m-4634787887509830958msolistparagraph" style="mso-list:l0 level1 lfo1">
SYSTEM:LOW-FAN-PWR (for PVVT systems)<o:p></o:p></li><li class="gmail-m-4634787887509830958msolistparagraph" style="mso-list:l0 level1 lfo1">
SYSTEM:MAX-CAP/UNIT (for VRF coils)<o:p></o:p></li><li class="gmail-m-4634787887509830958msolistparagraph" style="mso-list:l0 level1 lfo1">
CONDENSING-UNIT:TYP-CAP/SYSTEM (for VRF condensing units)<o:p></o:p></li></ul>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The file also adjusts the number of decimal places displayed for several keywords, such as the cooling EIR that you mentioned. I am happy to share this file with eQUEST users (it
is ~1.7 MB).<o:p></o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">~Bill<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><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"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Matthew S. Garlick via Equest-users<br>
<b>Sent:</b> Friday, July 3, 2020 11:20 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] DOE 2.3 VRF Heating Efficiency?<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Howdy folks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m working through an air source VRF system and have found no place to explicitly place a heating efficiency, only the cooling EIR. As far as I can see there’s no mention of heating efficiency in the user’s manual as well. Can anyone explain
how heating efficiency is calculated in 2.3 without the user specifying it? <o:p>
</o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On a related note, I’m also studying a water source VRF system on this project. Has anyone heard rumors of this being developed in a future version of eQUEST? I’m currently using the WSHP workaround you all helped me put together a year
or so ago. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks and have a great 4<sup>th</sup> of July weekend!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:black"><img border="0" width="125" height="54" style="width:1.302in;height:.5625in" id="_x0000_i1025" src="http://www.tbcxinc.com/TBCx_Logo_Email1000ppi.png" alt="TBCx"><br>
<br>
<b>Matt Garlick, CxA, CEM, BEMP</b><br>
Principal Commissioning Authority, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:black">Energy Engineer | TBCx<br>
<br>
E-mail: <a href="mailto:msg@tbcxinc.com">msg@tbcxinc.com</a><br>
Mobile: 801-907-5654<br>
Direct: 801-401-9492<br>
<br>
324 S. State Street, Suite 400<br>
Salt Lake City, UT 84111</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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