<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:10pt"><div>Hi:<br><br>Does anyone have the link that Steven mentioned?<br><br>Thank you,<br><br>Paul Diglio<br></div><div style="font-family: times new roman,new york,times,serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Steven Savich <ssavich@systemswestengineers.com><br><b><span style="font-weight: bold;">To:</span></b> Vikram Sami <VSami@lasarchitect.com>; eQUEST Users List <equest-users@lists.onebuilding.org><br><b><span style="font-weight: bold;">Sent:</span></b> Fri, March 5, 2010 6:02:54 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users] More about fans<br></font><br>
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<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Vikram,</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Reid Hart of PECI did a
presentation on this issue for the building simulation user's group a few
months ago, and discussed a spreadsheet tool to construct accurate DOE2
performance curves for variable flow air and water systems. I believe the
powerpoint presentation is still archived on the BSUG yahoo site, and the
spreadsheet is downloadable from PECI's website. I haven't tried using this
tool yet, so I cannot vouch for its accuracy or useability.</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Steven</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
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<p class="MsoNormal"><span style="font-family: "serif"; color: rgb(31, 73, 125);">Steven Savich, LEED AP</span><span style="font-size: 12pt; font-family: "serif"; color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family: "serif"; color: rgb(31, 73, 125);">Systems West Engineers</span><span style="color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family: "serif"; color: rgb(31, 73, 125);">411 High Street</span><span style="color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family: "serif"; color: rgb(31, 73, 125);">Eugene, OR 97401-2427</span><span style="color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family: "serif"; color: rgb(31, 73, 125);">(541) 342-7210</span><span style="color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family: "serif"; color: rgb(31, 73, 125);">(541) 342-7220 (fax)</span><span style="color: rgb(31, 73, 125);"></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "sans-serif";">From:</span></b><span style="font-size: 10pt; font-family: "sans-serif";">
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Vikram
Sami<br>
<b>Sent:</b> Friday, March 05, 2010 2:01 PM<br>
<b>To:</b> eQUEST Users List<br>
<b>Subject:</b> [Equest-users] More about fans</span></p>
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<p class="MsoNormal"><span style="color: rgb(0, 0, 180);">Same model – different fan
question. Table G3.1.3.15 Gives you a part load performance table for VAV fan
systems. Based on that, I created a performance curve (linear) for my VAV fan
system that looks like this:</span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);"><img id="Picture_x0020_1" src="cid:1.3369008143@web83304.mail.sp1.yahoo.com" width="734" height="546"></span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);">Problem is when I use this as
opposed to the default curve that came out of the wizard, the fan energy
doubles. The fan energy is still only 8% of the overall building load, so its
not alarming. Does this mean that the default curve was way to low? Is the
method above the way to model this performance curve?</span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);">Thanks for your help</span></p>
<p class="MsoNormal"><span style="color: rgb(0, 0, 180);"> </span></p>
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<p class="MsoNormal" style=""><b><span style="font-size: 12pt; font-family: "serif"; color: black;">Vikram
Sami,</span></b><span style="font-size: 12pt; font-family: "serif"; color: rgb(0, 0, 180);"> </span><span style="font-size: 12pt; font-family: "serif"; color: black;">LEED AP</span><span style="font-size: 12pt; font-family: "serif"; color: rgb(0, 0, 180);"> <br>
</span><span style="font-size: 12pt; font-family: "serif"; color: black;">Direct
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