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<DIV dir=ltr align=left><SPAN class=728265419-20062008><FONT face=Arial
color=#0000ff size=2>Try increasing thermostat deadband and insuring they are
reverse acting. You can try 4 DegF or 6 DegF. The DOE-2 manual suggests
this for VAV.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=728265419-20062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=728265419-20062008>
<DIV align=left>
<DIV align=left><FONT color=#0000ff>John R. Aulbach, PE, CEM</FONT></DIV>
<DIV align=left><FONT face=Arial size=2><EM>Project Manager</EM></FONT></DIV>
<DIV align=left><FONT face=Arial size=2><FONT color=#0000ff>Nexant,
Inc</FONT>.</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>701 West Kimberly Ave., Suite
245</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Placentia, CA 92870-6342
USA</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Phone: 714-524-4402</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Fax: 714-524-4407</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>email: <A
title=mailto:jaulbach@nexant.com
href="mailto:jaulbach@nexant.com">jaulbach@nexant.com</A></FONT></DIV>
<DIV> </DIV></DIV></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Zhen
Tian<BR><B>Sent:</B> Friday, June 20, 2008 12:53 PM<BR><B>To:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-sim] eQEUST ASHRAE
Basecase VAV heating unmet hours<BR></FONT><BR></DIV>
<DIV></DIV>
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<TD vAlign=top>Hello, all,<BR><BR>I am simulating a 3-floor, 78000 ft2
office building with eQUEST for LEED CS. For the ASHRAE basecase (VAV
system), there are many zones with the unmet heating setpoint. The unmet
hours around 100-180 which are 50 hours more than than the proposed design
case (water-loop heat pump system). Is there any method that can reduce
the unmet hours in the basecase VAV system? I tried to increase the sizing
ratio for heating and etc., but this does not reduce the unmet heated
hours.<BR><BR>Any
suggestions?<BR><BR>Thanks.<BR><BR>Regards,<BR><BR>David<BR></TD></TR></TBODY></TABLE><BR></BODY></HTML>