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<P CLASS="b2acf212-d838-4dd8-a31c-e2f0650bcbd3"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If CFD isn’t an option, one other eQuest option would be to break the atrium up into one conditioned, and one or more plenums (TYPE = PLENUM, not UNCONDITIONED). Make an assumption about how much load is displaced or only present in the plenum portion of the atrium. Then, put a portion of the glazing and loads in the plenum(s). You might for example assume that the bottom two floors are one conditioned zone, and the top seven floors are a large plenum. I believe the air in the plenum should pick up the heat from the glazing and loads placed in it. I would be cautious about using eQuest to predict what will actually happen in an atrium though.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jeremy<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:"Myriad Web Pro";color:gray'>___________________________________________</span></b><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:"Verdana","sans-serif";color:#5F5F5F'>Jeremy McClanathan</span></b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:gray'>,</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray'> P.E., BEMP, HFDP,</span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:gray'> </span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray'>LEED<sup>®</sup> AP BD+C </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='line-height:9.0pt'><b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:#5F5F5F'><img alt="CDi_Engineers_logo_color.jpg" height=15 id="Picture_x0020_8" src="cid:image001.jpg@01CD10DB.37C9D9B0" width=98></span></b><b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:olive'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray'>4200 194th St SW, Ste 200, Lynnwood, WA 98036</span><b><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:olive'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray'>P 425-672-1071 | F 425-778-8769 </span><span style='font-size:11.0pt;font-family:"Verdana","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:13.5pt;font-family:Webdings;color:#99CC00'>P</span><span lang=EN-GB style='font-size:11.0pt;font-family:Webdings;color:#99CC00'> </span><i><span lang=EN-GB style='font-size:7.0pt;font-family:"Verdana","sans-serif";color:#99CC00'>Please consider the environment before printing this email.</span></i><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><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"'> CleanTech Analytics [mailto:jeremiah@cleantechanalytics.com] <br><b>Sent:</b> Monday, April 02, 2012 2:06 PM<br><b>To:</b> Jason Quinn<br><b>Cc:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] Advice on modelling nine story atrium across shells<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#336666'>Sounds like a task that would be better done with single zone and analysed using CFD to me..</span><o:p></o:p></p><div><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#336666'>Possibly use a CFD program then use insight to work around your Equest model..</span><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#336666'><br clear=all></span><o:p></o:p></p><p class=MsoNormal><i><span style='font-family:"Verdana","sans-serif";color:#999999'>Jeremiah D. Crossett</span></i><o:p></o:p></p><p class=MsoNormal><i><span style='font-family:"Verdana","sans-serif";color:#999999'>CleanTech Analytics</span></i><o:p></o:p></p><p class=MsoNormal><i><span style='font-family:"Verdana","sans-serif";color:#999999'>503-688-8951</span></i><o:p></o:p></p><div><p class=MsoNormal><a href="http://www.cleantechanalytics.com" target="_blank"><i><span style='font-family:"Verdana","sans-serif";color:#999999'>www.cleantechanalytics.com</span></i></a><o:p></o:p></p><div><p align=center class=MsoNormal style='text-align:center'><o:p> </o:p></p><p align=center class=MsoNormal style='text-align:center'><img border=0 id="_x0000_i1025" src="http://cleantechanalytics.com/images/stories/cleantech%20analytics%20120.PNG"><o:p></o:p></p></div></div><div><div><p align=center style='margin:0in;margin-bottom:.0001pt;text-align:center'><i><span style='font-size:8.5pt;font-family:"Droid Serif","serif";color:#CCCCCC;background:white'>This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics</span></i><b><o:p></o:p></b></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br><br><o:p></o:p></p><div><p class=MsoNormal>On Mon, Apr 2, 2012 at 10:28 AM, Jason Quinn <<a href="mailto:jason.e.quinn@gmail.com">jason.e.quinn@gmail.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal>I've modeled a nine story office building which requires different<br>shells for several of the levels in the building. It also has a nine<br>story (full height) atrium that will be used to extract all of the<br>exhaust air (i.e. supply OA to the floors and condition via FC units<br>and pull exhaust air out of the top of the atrium). I'm aware that<br>eQuest doesn't track air flows but I'd like to best approximate the<br>atrium effects on the overall energy use of the building.<br><br>Current approach: I've modeled each floor as a separate zone and I'm<br>going to delete the floors and turn the ceilings into air-walls and<br>link them to the zone above. Currently I'm conditioning all of the<br>zones that make up the atrium but at some point I'd like to explore<br>not conditioning these zones to more accurately approximate how we'd<br>run the building.<br><br>Comments?<br><br>One alternate approach I've seen proposed is to replace all nine zones<br>in the atrium with one full height zone - the advantage is the glass<br>on the roof and upper walls can "see" the floor and walls in all of<br>the zones of the atrium. However this won't let me later go back in<br>and explore any variation of temperature with height. I think this<br>might be important as I would expect the air at the top of the atrium<br>to be warmer and cause more load on the top floor zones next to the<br>atrium.<br><span style='color:#888888'><br><span class=hoenzb>--</span><br><span class=hoenzb>Jason Quinn</span><br><span class=hoenzb>_______________________________________________</span><br><span class=hoenzb>Equest-users mailing list</span><br><span class=hoenzb><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a></span><br><span class=hoenzb>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a></span></span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></P>
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