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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Sharad,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thanks for the information. Can we give a part load fan curves if we know the part load fan power data? Or there any other way to model
this apart from VFD as mentioned in your mail?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Pramod<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Sharad Kumar via Equest-users<br>
<b>Sent:</b> Friday, August 2, 2019 5:22 PM<br>
<b>To:</b> equest-users <equest-users@lists.onebuilding.org><br>
<b>Subject:</b> Re: [Equest-users] ECM motors modelling in eQuest<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:#073763">Hi Pramod,</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:#073763">As per me the ECM motors modelling has to be chosen in between constant flow ,variable flow and other flow options.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:#073763">The limitation that eQUEST have is to opt between constant, variable or two speed for fan flows.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#073763">But as we know that ECM motors are also efficient and mightily run as a variable kind of fan.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#073763">At low speed the ECM is over 30% more efficient than a standard induction motor. The ECM motor has a minimum efficiency of 70% throughout its entire operating range.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:#073763">So as per me due to lack of accuracy in modeling the ECM motors i could have gone for modelling it as a variable speed fan flow parameters in eQUEST.</span><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>
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<p class="MsoNormal"><b><span style="color:#073763">Thanks and Regards,</span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#073763">Sharad.Kumar</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#073763">Freelancer</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#073763">India.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:#073763">......................................................................................................................................................</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">---------- Forwarded message ----------<br>
From: "Pramod .D" <<a href="mailto:d.pramod@setty.com" target="_blank">d.pramod@setty.com</a>><br>
To: "<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>><br>
Cc: <br>
Bcc: <br>
Date: Thu, 1 Aug 2019 16:52:36 +0000<br>
Subject: [Equest-users] ECM motors modelling in eQuest<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Hello Masters,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">I am working on a project where DOAS with ECM motors are used. This is something new to me. Has anyone of you came across this?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">The DOAS fans use EC motors and not VFDs. Apparently this fans has unloading efficiency power savings. The fan efficiency appear to be very low (around 50%-60%), but it is compensated
by premium EC motors supposed to give power savings. I have no clue on how to model this.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Awaiting your responses,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black">Pramod<o:p></o:p></span></p>
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<p class="MsoNormal">_______________________________________________<br>
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