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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Varkie,<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'>I’ve found your website fascinating, personally. <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'>I’m not currently an educator, so perhaps I’m not
the intended audience, but as an MEP designer actively practicing energy
modeling in industry (outside of academia) I’ve stumbled into and found the
BEPAN site to be very handy multiple times. Anyone who hasn’t
perused the site might want to dig around a bit… there’s quite a
few tools/spreadsheet examples provided which I’ve found
interesting-to-useful, though finding any one thing can be tricky as it’s
quite a lot of material!<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'>I hope the site doesn’t go down, or else if it should have
to you’ll give us a fair warning to scramble and make copies of useful
references/tools =). It seems to exist solely as a good-faith
contribution to helping others learn from your past experiences, and for that I
hope you know I for one very much appreciate your efforts!<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'>Thanks,<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'>~Nick<o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img width=119 height=37 id="Picture_x0020_1"
src="cid:image001.jpg@01CBEE44.8A8CC820" alt="cid:489575314@22072009-0ABB"></span><b><span
style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Calibri","sans-serif";
color:#CC9900'>PROJECT ENGINEER<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>Smith & Boucher Engineers</span><span style='font-size:7.5pt;
color:#CC9900'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>25501 west valley parkway<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>olathe ks 66061<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>direct 913 344.0036<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>fax 913 345.0617<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a href="www.smithboucher.com"
title="blocked::www.smithboucher.com"><span style='font-size:10.0pt'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue'> </span></u><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><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>
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<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"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Varkie
C Thomas<br>
<b>Sent:</b> Tuesday, March 29, 2011 6:38 PM<br>
<b>To:</b> Paul Diglio<br>
<b>Cc:</b> equest-users@lists.onebuilding.org; xiaoyang shi<br>
<b>Subject:</b> Re: [Equest-users] question about inefficiency of duct<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p>See page 14 to 17 "Thermal Analysis"<o:p></o:p></p>
<p><a href="http://bepan.info/class-notes/e6_-_loads-ducts-pipes">http://bepan.info/class-notes/e6_-_loads-ducts-pipes</a> <o:p></o:p></p>
<p><a
href="http://bepan.info/yahoo_site_admin/assets/docs/AES-Ductwork-System-Design.2134047.pdf">AES-Ductwork-System-Design</a><o:p></o:p></p>
<p>When the cooling DT (Room-Suppy Temp) is 20 degs, every degree temp rise
from the cooling coil affects the supply air by 5%. For a draw-thru
system with a supply static of 8" to 9" the heat gain across the fan,
the temp rise can be significant. The rule of thumb in the old days,
when no one could be bothered doing these calculations manually,
the temp-rise was assumed to be = 0.5 x SP. <o:p></o:p></p>
<p>The velocity upstream of the terminal box from the AHU through the
unconditioned shafts of high-rise bldgs is typically about 4,000 fpm which
results in low heat gain due to the high velocity. The terminal box and
the low velocity ductwork is above conditioned space (typically RA
plenum). If the ductwork is insulated on both sides of the TB, the rule
of thumb for a temp rise through the ducts is about 1 - 2 degs
which requires about a 10% increase in supply air.<o:p></o:p></p>
<p>Before anyone replies to this message saying that it has wandered off
the point from the issue being discussed, I will admit the reply is
an excuse to for mentioning the website. I am thinking of closing it down
if there is no interest from others in developing building energy analysis
course material from a full design perspective and not just using computer
program. The emphasis would be on teaching Energy Efficient Building
Design with project case studies. It does not quite fit in
with BEMBook The objectives are in the Introduction <a
href="http://bepan.info/introduction">http://bepan.info/introduction</a><o:p></o:p></p>
<p>Varkie<o:p></o:p></p>
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