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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'>Phil,<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 short answer is TRACE is not setup (directly) to model SRT’s. Creating a custom internal shading library member and a custom internal shading schedule that utilizes the reset and lockout table is a possibility. The reset and lockout table would allow you to modify the load based on hourly OADB, but not directly based on glazing temperature.<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><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'>Scott Hintz<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif";color:#1F497D'>CEM, LEED-AP BD+C, BEMP</span></b><span style='font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'>Energy Engineer<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'>Sustaining Systems Engineering (SSE)<br></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><img width=55 height=9 id="Picture_x0020_1" src="cid:image001.png@01CC356F.49419AE0" alt="cid:image003.jpg@01CB8011.2E333BA0"> </span><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'>Federal Technical Services</span><span style='font-size:8.0pt;font-family:"Calibri","sans-serif";color:#17365D'><br></span><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'>PO Box 21025, M/C: ISC-4011<br>Kennedy Space Center, FL 32899<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'>Building: M6-493, Office: 1100H2<br>(321) 867-8533 office <br>(321) 867-5810 fax<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="mailto:henry.d.turner@nasa.gov"><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif"'>scott.f.hintz@nasa.gov</span></a></span><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";color:#17365D'><o:p></o:p></span></p></div><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"'> Phil_Grossman@URSCorp.com [mailto:Phil_Grossman@URSCorp.com] <br><b>Sent:</b> Monday, June 27, 2011 2:29 PM<br><b>To:</b> trace-users@lists.onebuilding.org<br><b>Subject:</b> [Trace-users] Variable Shading Coefficient<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I have a 230,000 square feet, 400 room office building currently modeled in Trane Trace. Fifty percent of the building’s exterior envelope is windows. The solar heat gain coefficient (SHGC) for the windows is currently modeled as a constant. The goal is to use this model for LEED V3.0, EA Credit 1 - Optimize Energy Usage. </span><br><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The actual windows installed in the building are sunlight responsive thermochromic (SRT). With SRT windows their SHGC changes as the intensity of incident solar radiation changes. The SHGC is at minimum when the sun’s intensity is greatest. When the window’s temperature is 77 ° F the SHGC is 0.29 at 149 ° F the SHGC is 0.18. More information about this product is available at </span><a href="http://www.pleotint.com"><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>www.pleotint.com</span></a><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>. </span> <o:p></o:p></p><p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>It is my understanding that eQUEST V3.55 can model variable tint windows based on total incident solar radiation, transmitted solar radiation or outdoor temperature. Since the building is already modeled in Trace totally changing to eQUEST is considered impractical. </span> <o:p></o:p></p><p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I would like to know your experience and/or thoughts on how this building can be modeled with the SRT windows, preferably in Trace or possibly some combination of Trace and eQUEST. The model needs to be accurate, acceptable to the LEED reviewer, and consume as little of my time as possible. </span><o:p></o:p></p><p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thank you in advance for your assistance. </span><o:p></o:p></p><table class=MsoNormalTable border=0 cellpadding=0 width="100%" style='width:100.0%'><tr><td width="100%" style='width:100.0%;padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'><br></span><b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#333333'>Phil Grossman</span></b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#333333'>, PE, LEED®AP, HFDP<br></span><i><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#CD8406'>Senior Mechanical Engineer</span></i><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#CD8406'><br><br></span><img border=0 id="_x0000_i1025" src="cid:image002.gif@01CC356F.49419AE0" alt="URS Corporation"><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#CD8406'><br></span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'>3950 Sparks Drive SE<br>Grand Rapids, MI 49546<br>Tel: 616.574.8500<br></span><a href="http://www.urscorp.com/"><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'>Website</span></a><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'> | </span><a href="http://maps.google.com/maps?hl=en&um=1&ie=UTF-8&q=URS+Corporation+3950+Sparks+Drive,+Grand+Rapids,+MI&fb=1&split=1&gl=us&cid=0,0,14028053660553603137&ei=tavsScW2HIXwMs6ukd0F&sa=X&oi=local_result&ct=image&resnum=1"><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'>Map</span></a><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'><br><br>Direct: 616.574.8451<br>Fax: 616.574.8542<br>Email: </span><a href="mailto:Phil_Grossman@URSCorp.com"><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'>Phil_Grossman@URSCorp.com</span></a><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666'><br></span><i><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#088A08'>Please consider the environment before printing this email.</span></i><o:p></o:p></p></td></tr></table><p style='margin-bottom:12.0pt'><br><br><o:p></o:p></p><table class=MsoNormalTable border=0 cellpadding=0><tr><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#4F4F4F'>This e-mail and any attachments contain URS Corporation confidential information that may be proprietary or privileged. If you receive this message in error or are not the intended recipient, you should not retain, distribute, disclose or use any of this information and you should destroy the e-mail and any attachments or copies.</span><o:p></o:p></p></td></tr></table><p style='margin-bottom:12.0pt'><br><br><o:p></o:p></p></div></body></html>