<div>1. no idea</div><div><br></div>2. Check to see if the "plenum zones" are labeled as unconditioned or plenum int he zone pages. if it is plenum then they have to be used in the calculation as a plenum return system. if you change them all to unconditioned, they will be labeled as "plenum zones" but will allow you to call out direct or duct return systems.<br>
<br><div>Rob</div><div><br><div class="gmail_quote">On Thu, May 5, 2011 at 11:06 AM, James Hansen <span dir="ltr"><<a href="mailto:JHANSEN@ghtltd.com">JHANSEN@ghtltd.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">I’m getting some weird results from the current eQuest 3.64 model I’m running.</p><p class="MsoNormal"> </p><p class="MsoNormal">14 story office building, parallel FP terminals (using PIU system). Plenums have been modeled, although usually I leave them out.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">Two things are happening:</p><p class="MsoNormal"> </p><p><span>1)<span style="font:7.0pt "Times New Roman""> </span></span> If I let eQuest autosize the systems, the fan CFM are outrageous. On the order of 10 CFM per sq ft. If I put in a design CFM (closer to 1 CFM per sq ft), the results are more consistent with what I expect, but there are no unmet load hours either. So why the heck is eQuest oversizing the fan systems?</p>
<p><span>2)<span style="font:7.0pt "Times New Roman""> </span></span>I can’t “force” the return air path to be anything other than “Plenum Zones”. Even if I change it to duct or direct, after running eQuest, I go back in to the model and the system I changed has reverted back to plenum zones.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">Has anyone ever seen this issue before?</p><p class="MsoNormal"> </p><p class="MsoNormal">Unfortunately I can’t send out inp and pd2 files, sorry!</p><p class="MsoNormal"> </p>
<p class="MsoNormal"><b><span style="color:teal">GHT Limited<br></span></b><b><span><span style="color:black">James Hansen</span></span></b><b><span style="color:black">, PE, LEED AP</span></b></p><p class="MsoNormal"><b><span style="font-size:10.0pt;color:black">Senior Associate</span></b><b><span style="color:black"></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt"><span style="color:black">1010 N. Glebe Rd, Suite 200</span></span></p><p class="MsoNormal"><span style="font-size:7.5pt"><span style="color:black">Arlington</span><span style="color:black">, </span><span style="color:black">VA</span><span style="color:black"> </span><span style="color:black">22201-4749</span></span><span style="color:black"></span></p>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Rob Hudson<br>
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