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Dear All,<br>
I searched the archives to answer this question and didn't see
anything, but may have missed something. I am trying to model (for
LEED 2009) a warehouse that trucks occasionally drive into. The
space has the usual ventilation air prescribed for a warehouse by
62.1 supplied by RTU's. Additionally, there are fans that turn on
(3.73 kW for 16,000 cfm of outside air) when trucks are present. I
created a schedule for "trucks present" using fraction type at 1.2
hours per day each weekday. I'm not sure how to add the outside air
or get the extra fans to only run during those hours. <br>
<br>
Possible solutions:<br>
<ol>
<li>fans as separate "equipment load" in the zone, on the schedule
and add outside air to the standard ventilation air as a
fraction of 16,000 cfm. So new vent = std vent +
[(1.2/40)*16,000]. This wouldn't give the same peak load as
having a full 16,000 cfm though. <br>
</li>
<li>create dummy zone with no loads, walls, area, etc. and give
that zone and system the 16,000 cfm and 3.73 kW on the truck
schedule. Tried this and only got a runtime error with no
explination. <br>
</li>
<li>change the max OA to std vent + 16,000cfm and change the Min
OA schedule to reflect truck presence (run OA at 7.25% for all
hours 1.2 truck hours per day). Also, changed supply flow to
system supply=9,000 + 16,000. Tried this, but the supply flow
shown in hourly output reports was always 25,000!<br>
</li>
</ol>
Any suggestions?<br>
<div class="moz-signature"><br>
<span
style="font-size:11.0pt;font-family:Arial;color:black;font-weight:bold">
Jacob Goodman </span> <span
style="font-size:8.0pt;font-family:Arial;color:#666666;font-weight:normal">,
LEED AP, Green Building Specialist </span><br>
<span
style="font-size:8.0pt;font-family:Arial;color:#666666;font-weight:normal">v:509.280.7051 i:<a
href="http://www.lseng.com" border="0"><span
style="color:#666666"><font color="#666666">www.lseng.com</font></span></a></span><br>
<span
style="font-size:11.0pt;font-family:Arial;color:#6D928C;font-weight:bold">L&S
</span> <span
style="font-size:11.0pt;font-family:Arial;color:#6D928C;font-weight:bold;letter-spacing:
1.0pt"> Engineering Associates, Inc. </span><br>
<span
style="font-size:8.0pt;font-family:Arial;color:#666666;font-weight:normal">'High
Performance Design'</span> </div>
<br>
<blockquote
cite="mid:mailman.0.1316723932.16068.equest-users-onebuilding.org@lists.onebuilding.org"
type="cite"> </blockquote>
<br>
<br>
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