<font size=2 face="sans-serif">Hi John,</font>
<br>
<br><font size=2 face="sans-serif">I wasn't able to make any changes to
the model to correct the difference in fan power. However, I noticed a
couple of things.</font>
<br>
<ol>
<li value=1><font size=2 face="sans-serif">The Baseline Case "Pretend"
doesn't include any pressure drop adjustments from Table 6.5.3.1.1B. This
will help increase the baseline fan power. Note that credit for heat recovery
devices may not be taken unless it is required in the Baseline Case system
(see note under Table G3.1.2.9).</font>
<li value=2><font size=2 face="sans-serif">The Proposed Case "Actual"
fan power seems high. See attached pdf for a range of BHPs for a sample
TRANE AHU at 3,000 cfm. They range from 0.88 to 3.08 depending on the system
total static pressure. The system in the model has a nominal HP of 10 which
is being modeled as 7.46 kW.</font>
<li value=3></ol><font size=2 face="sans-serif">Hope that helps,</font>
<br><font size=2 face="sans-serif">Alex Chapin</font>
<br>
<br>
<br>
<br><font size=2 color=#3f803f face="Arial"><b>Alex N. Chapin</b></font>
<br><font size=2 color=#5f5f5f face="Arial"><b>Sustainability Program Engineer</b></font>
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LLC</b></font>
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<p><tt><font size=2>Date: Thu, 10 Apr 2014 18:01:15 +0000<br>
From: "Eurek, John S NWO" <John.S.Eurek@usace.army.mil><br>
To: "'trace-users@lists.onebuilding.org'"<br>
<trace-users@lists.onebuilding.org><br>
Subject: [Trace-users] Fan power (UNCLASSIFIED)<br>
Message-ID:<br>
<E777FD5A41D3B04A83296213737A85D7092442FB@EIS-MB0501WPC.eis.ds.usace.army.mil><br>
<br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Classification: UNCLASSIFIED<br>
Caveats: NONE<br>
<br>
Anybody,<br>
<br>
I need a little help. The fan energy usage of the Actual/Purposed
building is 4.5X more than the Pretend building.<br>
<br>
I've looked and looked and looked for something that is causing such a
huge difference.<br>
<br>
One thing I tried that really confused me was to set the system for the
pretend building as 'same as Alternate 1' and the pretend building fan
energy usage went up.... So then I went tab-by-tab and matched Alternative
1 to the setting that the Pretend building was using and the fan energy
for Alternate 1 was still over 2 times the Pretend building.<br>
<br>
<br>
<br>
John<br>
<br>
<br>
Classification: UNCLASSIFIED<br>
Caveats: NONE<br>
</font></tt>