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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Kathryn,<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'>The document that Pasha included in her email will work if your heat pumps are terminal heat pumps (System 2) and are rated using the ARI 240/260 rating method. However, if you are modeling packaged rooftop heat pumps (System 4), these heat pumps follow a different rating method, ARI 340/360. I haven’t reviewed this in detail but my guess is that the fan power is a little different than the 240/260 method.<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'>If you know the gross and net cooling capacities from the equipment cutsheet, you can calculate the fan power per CFM and an adjusted COP (or EIR) for the compressor/condenser power only. The difference between net and gross is the cooling required to overcome the fan heat and can be converted to Watts and used as the fan power. See the snapshot below from the 90.1-2007 Users Manual. It is an example on how to separate the two values.<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'>Alternatively, you could review the 340/360 standard to see how fan power is accounted and use those numbers. It could be as simple as the method described in Pasha’s email or by assuming a value for total static pressure, fan efficiency and motor efficiency and the calculating the fan power directly.<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'>John<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><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><img width=470 height=403 id="Picture_x0020_2" src="cid:image001.png@01CBAB47.4DB95390"></span><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:10.0pt;font-family:"Arial","sans-serif";color:gray'>John T. Forester, P.E., LEED AP, Mechanical Design Engineer </span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#0000A0'>I BVH Integrated Services I</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>617.658.9008 tel </span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#0000A0'>I</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'> </span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>617.244.3753 fax</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#0000A0'> </span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#0000A0'>I</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'> </span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>One Gateway Center Suite 506, Newton MA 02458 </span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#0000A0'>I <a href="http://www.bvhis.com">www.bvhis.com</a> I Hartford ● New Haven ● Boston</span></b><span style='font-size:10.0pt;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><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><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-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Pasha Korber-Gonzalez<br><b>Sent:</b> Monday, January 03, 2011 12:33 PM<br><b>To:</b> Ana N.<br><b>Cc:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] Converting Heat Pump COP to EIR<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Here's a good reference for use too. See attached,<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Pasha<o:p></o:p></p></div><div><p class=MsoNormal>On Mon, Jan 3, 2011 at 9:25 AM, Ana N. <<a href="mailto:ananeddav@hotmail.com">ananeddav@hotmail.com</a>> wrote:<o:p></o:p></p><div><p><span style='font-size:10.0pt;font-family:Courier'> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:Courier'>You can use this link to access discussion on this topic.<br> <br><a href="http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/2010-May/004407.html" target="_blank">http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/2010-May/004407.html</a><br> <br> <br>Heating EIR = (1/(COP*3.413)-0.012167)/((1/3.413)-0.012167)<br>and<br>Heating EIR = (1/((HSPF*0.28+1.13)*3.413)-0.012167)/((1/3.413)-0.012167)<br> <br>Hope this helps, <br></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Ana</span><span style='font-size:10.0pt;font-family:Courier'><o:p></o:p></span></p><p class=MsoNormal> <o:p></o:p></p><div class=MsoNormal align=center style='text-align:center'><hr size=2 width="100%" align=center></div><p class=MsoNormal>Date: Mon, 3 Jan 2011 08:12:26 -0800<br>From: <a href="mailto:kathryn.kerns@bceengineers.com" target="_blank">kathryn.kerns@bceengineers.com</a> <o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>To: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>Subject: [Equest-users] Converting Heat Pump COP to EIR<o:p></o:p></p></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Everyone, is there a relationship written down somewhere that removes fan energy from a heat pump COP value to develop a heating EIR? Something like the DX cooling EER equation that removes fan energy from EIR cooling values? It looks like the eQuest wizard is doing something like that when a heat pump heating COP is entered, but I am not sure what.</span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>_______________________________________________ Equest-users mailing list <a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a> To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" target="_blank">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a> <o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Equest-users mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>