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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'>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'>I see two things which are likely culprits. <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=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo5'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>1.<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'>As Alex pointed out, the fan power in the Proposed model seems high. Looking at your “Equipment Energy Consumption” output report, I see that the fan kW for the Proposed model is more than twice as high as that for the Pretend model, though the supply CFMs are similar.<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo5'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>2.<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'>Looking at the same report, I notice that the fans never come close to drawing their full power (looking at monthly demand) in the Pretend model, which is unusual. This indicates that the energy model is never seeing close to design conditions. Meanwhile, the Proposed model does reach its maximum fan kW or close to it at some point in every month of the year. Looking through your model, I think a reason for this difference could be your ‘people’ schedules. They are set to 0% in the Pretend model. Since your fans are set to cycle with occupancy, this will have a large effect on run time as well as cooling load. I would suggest taking a close look at all of your schedules to make sure they are the same between models.<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'>I hope that helps,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Christian<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:11.0pt;font-family:"Calibri","sans-serif";color:#595959'>Christian Kaltreider, LEED AP</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#595959'> | Energy Analyst<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#4F6228'>Sud Associates, P.A.</span></b><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#595959'> | T 828.255.4691 | F 828.255.4949 | <a href="http://www.sudassociates.com">www.sudassociates.com</a><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'><o:p> </o:p></span></p><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"'> trace-users-bounces@lists.onebuilding.org [mailto:trace-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>AChapin@sriregistrar.com<br><b>Sent:</b> Friday, April 11, 2014 10:04 AM<br><b>To:</b> john.s.eurek@usace.army.mil; trace-users@lists.onebuilding.org<br><b>Subject:</b> [Trace-users] Fan power<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi John,</span> <br><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I wasn't able to make any changes to the model to correct the difference in fan power. However, I noticed a couple of things.</span> <o:p></o:p></p><ol start=1 type=1><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The Baseline Case "Pretend" doesn't include any pressure drop adjustments from Table 6.5.3.1.1B. This will help increase the baseline fan power. Note that credit for heat recovery devices may not be taken unless it is required in the Baseline Case system (see note under Table G3.1.2.9).</span> <o:p></o:p></li></ol><ol start=2 type=1><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo3'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The Proposed Case "Actual" fan power seems high. See attached pdf for a range of BHPs for a sample TRANE AHU at 3,000 cfm. They range from 0.88 to 3.08 depending on the system total static pressure. The system in the model has a nominal HP of 10 which is being modeled as 7.46 kW.</span> <o:p></o:p></li></ol><ol start=3 type=1><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo4'><o:p> </o:p></li></ol><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hope that helps,</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Alex Chapin</span> <br><br><br><br><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#3F803F'>Alex N. Chapin</span></b> <br><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'>Sustainability Program Engineer</span></b> <br><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'>SRI Green Building Certification, LLC</span></b> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'>300 Northpointe Circle • Suite 304</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'>Seven Fields, PA 16046 • USA</span> <br><br><a href="file:///\\SRI-FS1\WPDOCS\07%20Marketing%20&%20Sales\01Marketing-PARTIAL\01Marketing\Email%20Footer\www.SRIRegistrar.com"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'>www.SRIRegistrar.com</span></a> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'><a href="mailto:achapin@SRIRegistrar.com">achapin@SRIRegistrar.com</a></span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'>T: (724) 934-9000 x619</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#5F5F5F'>F: (724) 935-6825</span> <br><br><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#3F803F'>Building Sustainability</span></b> <o:p></o:p></p><p><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'>This message and any included attachments are from SRI Quality System Registrar, and are intended only for the addressee. The information contained herein may include privileged or confidential information. Unauthorized review, forwarding, printing, copying, distributing or using such information is strictly prohibited and may be unlawful. If you have received this message in error, or have reason to believe that you are not authorized to receive it, please promptly delete it and notify the sender by e-mail with a copy to <a href="mailto:mail@sriregistrar.com">mail@sriregistrar.com</a>. Thank you.</span> <o:p></o:p></p><p><tt><span style='font-size:10.0pt'>Date: Thu, 10 Apr 2014 18:01:15 +0000</span></tt><span style='font-size:10.0pt;font-family:"Courier New"'><br><tt>From: "Eurek, John S NWO" <<a href="mailto:John.S.Eurek@usace.army.mil">John.S.Eurek@usace.army.mil</a>></tt><br><tt>To: "'trace-users@lists.onebuilding.org'"</tt><br><tt> <<a href="mailto:trace-users@lists.onebuilding.org">trace-users@lists.onebuilding.org</a>></tt><br><tt>Subject: [Trace-users] Fan power (UNCLASSIFIED)</tt><br><tt>Message-ID:</tt><br><tt> <<a href="mailto:E777FD5A41D3B04A83296213737A85D7092442FB@EIS-MB0501WPC.eis.ds.usace.army.mil">E777FD5A41D3B04A83296213737A85D7092442FB@EIS-MB0501WPC.eis.ds.usace.army.mil</a>></tt><br><tt> </tt><br><tt>Content-Type: text/plain; charset="us-ascii"</tt><br><br><tt>Classification: UNCLASSIFIED</tt><br><tt>Caveats: NONE</tt><br><br><tt>Anybody,</tt><br><br><tt>I need a little help. The fan energy usage of the Actual/Purposed building is 4.5X more than the Pretend building.</tt><br><br><tt>I've looked and looked and looked for something that is causing such a huge difference.</tt><br><br><tt>One thing I tried that really confused me was to set the system for the pretend building as 'same as Alternate 1' and the pretend building fan energy usage went up.... So then I went tab-by-tab and matched Alternative 1 to the setting that the Pretend building was using and the fan energy for Alternate 1 was still over 2 times the Pretend building.</tt><br><br><br><br><tt>John</tt><br><br><br><tt>Classification: UNCLASSIFIED</tt><br><tt>Caveats: NONE</tt></span><o:p></o:p></p></div></body></html>