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<p class=MsoNormal><font size=2 color=navy face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;color:navy'>The way I would do it is to use the
OA-FROM-SYSTEM keyword and add the ERU as a separate system with ventilation
heat recovery. In this way, you can define the heat recovery and power
and flow characteristics of the ERU explicitly. </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;color:navy'>I usually do this by first creating a
very small (1 sq-ft) dummy space, then a dummy thermal zone for that space.
Then, create the ERU as a 100% OA constant volume system serving that thermal
zone. Now comes the fun part. You close eQUEST, open the .inp with
a text editor and cut the new system and all its keywords from the bottom of
the list of systems and paste it to the top of the system list. If you
don’t do this, when you run the simulation, it will complain that the
OA-FROM-SYSTEM system referenced does not precede the current system and will
abort the sim. Now, reopen eQUEST and in your 6 systems, use the
OA-FROM-SYSTEM keyword on the system, OA tab to define that the ventilation air
is coming from your ERU. </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;color:navy'>Hope this helps.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;color:navy'> </span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com] <b><span style='font-weight:bold'>On Behalf Of </span></b>Kevin
Kyte<br>
<b><span style='font-weight:bold'>Sent:</span></b> </span></font><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>November 21,
2007</span></font><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> </span></font><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>10:55 AM</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'><br>
<b><span style='font-weight:bold'>To:</span></b> BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [BLDG-SIM] Equest: ERU
with added heat and vfd's</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Simulating
an energy recovery unit which serves six air handling units. I suppose this
is simply enough, I split the total cfm into percentages for each unit and
incorporate into each unit’s heat recovery, yes? Is there any way
to include additional heat from the energy recovery unit? Perhaps split the
total heat into percentages and include this in each unit’s heating
capacity. How about variable frequency drives on supply and exhaust fans
for energy recovery unit? Perhaps this could be modeled as a 10%
reduction in the fan power similar to occupancy sensors on lights?
Regarding LEED, would usgbc need a credit interpretation request for something
like this or maybe just mentioning it as a default overridden in the submittal
would suffice. Would anyone who has encountered this care to chime in? Any
suggestions would be forthcoming. Thank you.</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:11.0pt;font-family:Calibri;color:#1F497D'> </span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=3 color="#1f497d"
face=Calibri><span style='font-size:12.0pt;font-family:Calibri;color:#1F497D'>Kevin
Kyte, </span></font><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#1F497D'>LEED AP</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:10.0pt;font-family:Calibri;color:#1F497D'>Jr.
Mechanical Engineer</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>RobsonWoese,
Inc.</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:10.0pt;font-family:Calibri;color:#1F497D'>T:
716-636-1800</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:10.0pt;font-family:Calibri;color:#1F497D'>F:
716-636-1856</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:11.0pt;font-family:Calibri;color:#1F497D'> </span></font></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal style='margin-left:36.0pt'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Zhen Tian<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, November 20, 2007
5:38 PM<br>
<b><span style='font-weight:bold'>To:</span></b> BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [BLDG-SIM] add ceiling in
eQUEST</span></font></p>
</div>
<p class=MsoNormal style='margin-left:36.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Dear all,<br>
<br>
When I model a one-floor building in eQUEST, I found that adding the
"lay-in acoustic tile" ceiling (no insulation added) will cause the
peak load through roof to zero. When eliminate the ceiling, a large part of the
building heat flow will go through the roof.<br>
<br>
I also tried several buildings. When added ceiling, then the heat flow through
roof turns to zero. Does anyone have an idea why this happens? <br>
<br>
Thanks a lot.<br>
<br>
Regards,<br>
<br>
David</span></font></p>
<p style='margin-left:36.0pt'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<div class=MsoNormal align=center style='margin-left:36.0pt;text-align:center'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=1 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='margin-left:36.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Be a better sports nut! Let
your teams follow you with Yahoo Mobile. <a
href="http://us.rd.yahoo.com/evt=51731/*http:/mobile.yahoo.com/sports;_ylt=At9_qDKvtAbMuh1G1SQtBI7ntAcJ%0d%0a">Try
it now.</a></span></font></p>
<pre style='margin-left:36.0pt'><font size=2 face="Courier New"><span
style='font-size:10.0pt'> </span></font></pre><pre style='margin-left:
36.0pt'><font size=2 face="Courier New"><span style='font-size:10.0pt'> </span></font></pre><pre
style='margin-left:36.0pt'><font size=2 face="Courier New"><span
style='font-size:10.0pt'>==================</span></font></pre><pre
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