<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v =
"urn:schemas-microsoft-com:vml" xmlns:o =
"urn:schemas-microsoft-com:office:office" xmlns:w =
"urn:schemas-microsoft-com:office:word" xmlns:m =
"http://schemas.microsoft.com/office/2004/12/omml"><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.6000.16544" name=GENERATOR>
<STYLE>@font-face {
font-family: Calibri;
}
@font-face {
font-family: MS Shell Dlg;
}
@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.0in 1.0in 1.0in; }
P.MsoNormal {
FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"
}
LI.MsoNormal {
FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"
}
DIV.MsoNormal {
FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"
}
A:link {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlink {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
A:visited {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlinkFollowed {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.EmailStyle17 {
COLOR: windowtext; FONT-FAMILY: "Calibri","sans-serif"; mso-style-type: personal-compose
}
.MsoChpDefault {
mso-style-type: export-only
}
DIV.Section1 {
page: Section1
}
</STYLE>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></HEAD>
<BODY lang=EN-US vLink=purple link=blue>
<DIV dir=ltr align=left>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>Hi Kevin,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>Several things I look at when trying to limit the unmet
hours in a building:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>1. First of all, look at SS-R and SS-F reports to get
a better handle on what is going on, is there simultaneous heating and cooling
during the winter? If so, the tstat setpoints may be too
close.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>2. Do you have the economizer turned on during the
winter for "free cooling" and to limit the use of mechanical cooling?This is
accomplished through the OA schedule, see the help screen. Often a
separate schedule is needed for each AHU. To turn the economizer on but
limit the OA during unoccupied periods, use a 0.01 as the fraction. If you
turn it to 0.0, you turn off the ecenomizer completely.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>3. During the winter, you may be able to set the
cooling setpoint slightly higher to limit the use of mechanical heating; i.e.
say up to 78 or 80 instead of 75.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>4. Is your OA turned off during optimal start periods
or periods when you are trying to bring the spaces back to occupied
temeratures?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>5. If there are unmet heating hours during the
summer, do you have the tstat setpoints set back to say 55F so that heating
doesn't come on?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>All of the above involve schedules. Keep in mind that
the schedules must be identical in both the proposed and budget
buildings.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=531300117-22102007><FONT face=Arial
color=#0000ff size=2>I hope this helps and best of luck to
you.</FONT></SPAN></DIV></DIV>
<DIV> </DIV>
<DIV align=left><FONT size=2>Sheila Sagerer</FONT></DIV>
<DIV align=left><FONT size=2>Energy Engineer, EIT, LEED AP</FONT></DIV>
<DIV align=left><FONT size=2>Energy Opportunities, Inc, a 7group
company</FONT></DIV>
<DIV align=left><FONT size=2>Phone: 717-880-9069</FONT></DIV>
<DIV align=left><FONT size=2>Fax: 717-291-9497</FONT></DIV>
<DIV align=left><FONT size=2>www.sevengroup.com</FONT></DIV>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com] <B>On Behalf Of </B>Kevin Kyte<BR><B>Sent:</B>
Monday, October 22, 2007 10:30 AM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Meeting umnet hours -
Equest<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>Dear All,<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I would like some guidance concerning methodologies for
systematically meeting unmet hour requirements as indicated in ASHRAE 90.1-2004
Appendix G3.1.2.2. When all building systems are believed to be correctly
entered and unmet hours are out of range. I know I can make certain
changes to this model to obtain less than 300 unmet hours. Is there any
unspoken hierarchy of steps to input changes? Or is it all just
guesswork? Is there anything that is a no-no and should not be
changed? Specifically, I have a project in which the building energy
management system allows cooling when the temperature is above 55<SPAN
style="FONT-SIZE: 13pt; FONT-FAMILY: 'Arial','sans-serif'">°</SPAN>F leading to
several thousand unmet hours for this heating dominated building with unusually
high insulation and solar transmittance values and way oversized existing
equipment. If I making cooling available year round then gone, all
better. Of course there is that graph that shows how cooling in the winter
is over half the cooling in used in summertime. Or should I go through
each zone and systematically change occupancies, equipment wattages,
outside airflows, bogus baseboard heating (anything else I can fit in here) and
then do several hundred iterations of simulations until someday I may finally
have under 300 unmet hours for this … standard. Do I even need to meet
this 300 hours, for LEED purposes I would have to, correct?<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Yours thoughts, PLEASE?<SPAN
style="FONT-SIZE: 8.5pt; FONT-FAMILY: 'MS Shell Dlg','sans-serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P></DIV><PRE>
==================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE><PRE>
===========================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BODY></HTML>