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<p class="MsoNormal"><span style="color:#1F497D">Dan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Your sign is flipped on in the denominator. It should be (3.413<sup>-1</sup> + 0.012167). I’m attaching a sheet that went around a while ago about converting from EER to EIR that goes into more detail. Hope that
helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Brendan Hall,
</span><span style="font-size:10.0pt;color:#1F497D">M.Sc., LEED AP BD+C<br>
</span><span style="color:#1F497D">Engineer, Mechanical</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:13.5pt;font-family:"Arial","sans-serif";color:red">karpinski<br>
</span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D">ENGINEERING<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D">3135 Euclid Avenue</span><span style="color:#1F497D"><br>
</span><span style="font-size:10.0pt;color:#1F497D">Cleveland, OH 44115</span><span style="color:#1F497D"><br>
</span><b><span style="font-size:10.0pt;color:#1F497D">P</span></b><span style="font-size:10.0pt;color:#1F497D"> 216.391.3700 x 3111<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="SV" style="font-size:10.0pt;color:#1F497D">E </span></b><span lang="SV" style="font-size:10.0pt;color:#1F497D">
</span><span style="font-size:10.0pt;color:#1F497D"><a href="mailto:bhall@karpinskieng.com"><span lang="SV" style="color:#1F497D;text-decoration:none">bhall@karpinskieng.com</span></a></span><span lang="SV" style="font-size:10.0pt;color:#1F497D"><br>
<b>W</b> www.</span><span style="font-size:10.0pt;color:#1F497D"><a href="http://www.karpinskieng.com/" title="http://www.karpinskieng.com/"><span lang="SV" style="color:#1F497D;text-decoration:none">karpinskieng.com</span></a></span><span lang="SV" style="font-size:10.0pt;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<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>Daniel Kaler<br>
<b>Sent:</b> Tuesday, February 07, 2012 1:39 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Cooling EIR<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">I don’t mean to ask questions back to back days here, but I ran into roadblock. I found an equation for the compressor EIR to be:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">Cooing EIR=(1/EER-0.012167)/(1/3.413-0.012167)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">Has anyone tried to derive this, or know of a document that has done so? I seem to be missing something in my derivation as follows:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Optima LT"">EER=Cooling Output (Btuh)/(Supply Fan Input (W) + Compressor Input (W))<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Optima LT"">1/EER=Supply Fan Input/Cooling Output + Compressor Input/Cooling Output<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Optima LT"">Compressor Input/Cooling Output = 1/EER – Supply Fan Input/Cooling Output<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">At ARI condition supply fan is rated at 365W/CFM & 400CFM/Ton<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">So Supply Fan Input/Cooling Output = 0.146 kW/Ton or .012167 W/Btuh<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo4"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Optima LT"">Compressor Input/Cooling Output = 1/EER - 0.012167<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo4"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Optima LT"">Compressor Input/Cooling Output (Btu/Btu) = 3.413*(1/EER – 0.012167)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">i.e.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">EER=11<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">Compressor EIR = 3.413*(1/11 – 0.012167) = 0.2687 (should be 0.2580)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">Is there something that I am missing?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT"">Thank in advance,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Optima LT""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Optima LT";color:#1A2A6C">Daniel Kaler<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Optima LT";color:#1A2A6C">Energy Engineer, EIT<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:6.0pt;font-family:"Optima LT";color:#1A2A6C"><o:p> </o:p></span></b></p>
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<p class="MsoNormal"><b><span style="font-size:6.0pt;font-family:"Optima LT";color:#1A2A6C"><o:p> </o:p></span></b></p>
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