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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Perhaps the discrepancy stems from the use of SIZING-OPTION in the eQuest model. This keyword is used in the SYSTEM and the ZONE definitions. It may be worth
reading the DOE22 Dictionary manual for clarification.<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">Attached is an interesting paper comparing how the some of the different simulation programs calculate solar loads.
<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">Christopher R. Jones</span></b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">,
P.Eng.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">Technical Specialist</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">WSP Canada Inc.</span></b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">2300 Yonge Street, Suite 2300<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">Toronto, ON M4P 1E4 Canada</span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">T +1 416-644-0252<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-CA"><a href="http://www.wspgroup.ca/"><span style="color:blue">www.wspgroup.ca</span></a></span><u><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:blue;mso-fareast-language:EN-CA"><o:p></o:p></span></u></p>
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<p class="MsoNormal" style="text-autospace:none"><i><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6EA900;mso-fareast-language:FR">Please consider the environment before printing...<o:p></o:p></span></i></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Mike Schaefer via Equest-users<br>
<b>Sent:</b> Tuesday, May 09, 2017 8:54 AM<br>
<b>To:</b> Annie Marston via Equest-users <equest-users@lists.onebuilding.org><br>
<b>Subject:</b> [Equest-users] ASHRAE Bldg_Modeling Comparisons<o:p></o:p></span></p>
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<p><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Per user comments from my previous post, below, I’ve included my model’s input and sim files.<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">David Eldridge, I appreciate your input and I’m checking my loads per your comments.
<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">I’m running an office building with three different energy programs (Trane Trace, Carrier HAP, and DOE’s eQUEST to compare and contrast each energy modeling programs output. Two of my programs Trane
Trace and Carrier HAP have similar rooftop unit sizing, however, my eQUEST model is producing rooftop unit sizes (RTU-1 & RTU-2) that greatly exceeds the other two programs. I believe that this difference is the ventilation load. CFM’s and building sensible
loads are similar, however. There is a large discrepancy between the total cooling capacity (defined by “cooling capacity” in eQUEST’s SV-A reports. My eQuest model is reporting a much higher than expected total “Cooling Capacity” for my rooftop units. All
models have two VAV rooftop units (one for each floor of a two story office building). The ventilation rates, internal loads and envelope are identical between my models. The models have air side economizers w/integrated dry bulb with an upper cutoff of 75
deg. F with the non-economizer outside air turned off during unoccupied hours. All programs are using KC, MO TMY2 weather data.<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Can anyone explain, or find my error, in the eQUEST modeling that is causing the unusual load in ventilation? It seems obvious that the three programs would produce similar outputs, however, there
must be an eQUEST modeling error that I’ve created.<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Also, does eQUEST have a load breakdown that describes (lists) the values that make-up the “SV-A cooling capacity”?<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">I’ve attached the Carrier RTU-1 (1st floor office load) system report and the eQUEST model.<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Thanks,<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p><strong><span style="font-family:"Arial",sans-serif;color:black">Michael Schaefer - P.E.*, LEED AP</span></strong><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><strong><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Licensed in Kansas, Missouri, and Colorado</span></strong><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
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