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<p class="MsoNormal">Tip-of-the-month: Creating custom glass types using the latest WINDOW software.<o:p></o:p></p>
<p class="MsoNormal">The Window Manufacturers Window Library that comes with eQUEST is now 12 years old. Today’s Zero-Energy and Passive House projects have window assembly performance outside the available range of library selections. eQUEST has a built-in
tool for importing glass type data. I have finally figured out how to use it! Here’s the process I followed:<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Download and install WINDOW.
<a href="https://windows.lbl.gov/tools/window/software-download">https://windows.lbl.gov/tools/window/software-download</a> The built-in eQUEST library glass types were created in WINDOW 5.2. I installed 7.6.04 instead of the newest beta version.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Watch the Glazing System tutorial and the Window with Generic Frame tutorial (in that order) and download other documentation at
<a href="https://windows.lbl.gov/tools/window/documentation">https://windows.lbl.gov/tools/window/documentation</a><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Open WINDOW. Respond to the Update Manager which pops-up automatically. (I updated the International Glazing Database (IGDB) to version 63.)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Watch the tutorials in Step 2 and follow along.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Create a new glazing system per the tutorial. When you “Calc”, the results show you the COG U-factor, the VLT(Tvis) and the SHGC/SC for the glazing only (no frame effects included).<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Create a new window per the tutorial, using the glazing system. Note: I don’t think it matters what you select for the frame type as long as you use one of the first four which are
standard ASHRAE frames. You input the actual frame properties within eQUEST.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Save and Calc the window.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Click “Report” and select “DOE-2” report type. (DOE-2 is not a Report type option from the Glazing System Library. You have to be within the Window Library.)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Save the .txt file in the Window folder within the eQUEST Data folder. (Such as Documents -> eQUEST 3-65-7175 Data -> Window)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Open the file with a text editor. EDIT THE FIRST LINE. The file will not import properly into eQUEST if the first line starts with “BERKELEY LAB WINDOW v7.6.4.0”. I don’t know which
part causes the error but it will work if you change the first line to:<o:p></o:p></li></ol>
<p class="MsoListParagraph">Window 5.2 v5.2.12 DOE-2 Data File : Multi Band Calculation<o:p></o:p></p>
<ol style="margin-top:0in" start="11" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Save the edited .txt file.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Open an eQUEST model to use the new glass type.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Go to Tools -> Import Window4/5 Report File… and select the file you saved in step 11.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">eQUEST asks if you want to Reevaluate all components. Sure. Go crazy.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">A new Glass Type Code is created, and a new Glass Type which uses the new G-T-C.<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I believe the above process will work with any recent eQUEST version running either DOE-2.2 or DOE-2.3 but I’ve only tried it in build 7175, DOE-2.3.<o:p></o:p></p>
<p class="MsoNormal">The FRAME-WIDTH, FRAME-CONDUCT and SPACER-TYPE will all alter the performance of a WINDOW in eQUEST/DOE-2. See the LV-D and LV-H reports to see the impact of the new glass type and frame properties. The spacer type impacts window performance
(as verified by BEPS/BEPU), but the change doesn’t seem to appear in the LV-D and LV-H reports.<o:p></o:p></p>
<p class="MsoNormal">I am still learning the WINDOW software and have not tried THERM or the other LBNL software that interacts with it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Yes, you can use the “Simplified” method to define the glass type (TYPE = SHADING-COEF), which allows you to use any values you want for shading coefficient, glass conductance, visible transmittance and outside emissivity. This gives less
accurate solar heat gains, especially with multipane and/or coated windows, and the conductance does not vary with inside-to-outside temperature difference.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Have fun and pay it forward!<o:p></o:p></p>
<p class="MsoNormal">~Bill<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:3.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></b></p>
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