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<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2>Karen,</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>not
sure I totally understand eQUEST options either... here's my
shot:</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>the
relevant keywords are: </FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>-
MIN-OUTSIDE-AIR</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>-
OA-SIZING-METHOD</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>-
MIN-OA-METHOD</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>-
MIN-AIR-SCH</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2>and</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>-
OA-CONTROL</FONT></SPAN></DIV></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>if you
search on these in the "DOE22Vol2-Dictionary.pdf" document from doe2.com, you'll
see options for OA CFM control, which include fixed quantity, increased
vent for economizer, and decreased minimum ventilation for CO2
control.</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>Under
DOE-2.1e, often the default was fixed quantity OA; I modeled DCV by correlating
a minimum outside air schedule to the occupant
schedule.</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>If you
look at your BDL file you can see how what defaults eQUEST is generating and the
relevant differences between your systems.</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>Aaron
Dahlstrom</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff size=2>AKF
Engineers</FONT></SPAN></DIV>
<DIV><SPAN class=399432719-24082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B>On Behalf Of </B>Karen
Walkerman<BR><B>Sent:</B> Friday, August 24, 2007 8:46 AM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Demand Controlled ventilation
in eQuest<BR><BR></FONT></DIV>
<DIV>Hello all,</DIV>
<DIV> </DIV>
<DIV>I'm a little confused by eQuest's options for ventilation air and
control.</DIV>
<DIV> </DIV>
<DIV>When I specify OA-FLOW/PER, this value seems to become my minimum outdoor
air flow. I would expect this entry to follow the occupancy schedule and
modulate with demand, or at least to have the option to schedule the OA flow.
</DIV>
<DIV> </DIV>
<DIV>When an economizer is specified, the total energy use drops significantly
and the loads seem to modulate with the OA flow (although there may be some
other effects going on here too).</DIV>
<DIV> </DIV>
<DIV>Any ideas on why this happens? Is there any way to model a
demand-controlled system that does not have an economizer attached?</DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
<DIV> </DIV>
<DIV>~karen~</DIV>
<DIV><BR clear=all><BR>-- <BR>Karen Walkerman<BR>Second Law
Consulting<BR>802-238-0980<BR><A
href="mailto:kwalkerman@gmail.com">kwalkerman@gmail.com</A>
</DIV></BLOCKQUOTE><PRE>
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