<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.2900.3157" name=GENERATOR></HEAD>
<BODY>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>I am trying to
sift through how eQuest calculates a chiller's end electrical usage and I am
stuck on the fraction of hour the chiller operates. </FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>The DOE-2
engineers manual says it is calculated as follows:</FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>FRAC = PL /
RMIN,</FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>where PL is the
average part load ratio over the hour, calculated as:</FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>PL = ALOAD /
CAP,</FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>where ALOAD is the
assigned hourly load and CAP is the corrected operating
capacity.</FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>RMIN is the part
load ratio of rated load at which the chiller can operate
continuously.</FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008></SPAN> </DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>I have used
some of the calculated values in the hourly report and cannot verify
how eQuest is calculating this FRAC amount.</FONT></SPAN></DIV>
<DIV><SPAN class=403153415-16102008></SPAN> </DIV>
<DIV><SPAN class=403153415-16102008><FONT face=Verdana size=2>Does anyone have
some insight?</FONT> </SPAN></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: Verdana">Thanks,</SPAN></P>
<P class=MsoNormal><B><SPAN style="FONT-SIZE: 8pt; FONT-FAMILY: Verdana">Aaron
Etzkorn, EIT</SPAN></B><BR><SPAN
style="FONT-SIZE: 8pt; COLOR: black; FONT-FAMILY: Verdana">Engineer
I<BR><BR></SPAN><B><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: Verdana">TAC<BR></SPAN></B><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: Verdana">16011 College Blvd, Suite
212<BR>Lenexa, KS 66219</SPAN><BR><BR><SPAN
style="FONT-SIZE: 8pt; COLOR: black; FONT-FAMILY: Verdana">Direct: +1
(913) 469-0203 <BR>Fax: +1 (913)
469-0206<BR>Mobile: +1 (913) 620-3291<BR>Email:<SPAN
style="mso-tab-count: 1"> </SPAN></SPAN><U><SPAN
style="FONT-SIZE: 8pt; COLOR: blue; FONT-FAMILY: Verdana"><A
title=mailto:Aaron.Etzkorn@tac.com
href="mailto:Aaron.Etzkorn@tac.com">Aaron.Etzkorn@tac.com</A><BR></SPAN></U><SPAN
style="FONT-SIZE: 8pt; COLOR: black; FONT-FAMILY: Verdana">Web:<SPAN
style="mso-tab-count: 1"> </SPAN></SPAN><U><SPAN
style="FONT-SIZE: 8pt; COLOR: blue; FONT-FAMILY: Verdana"><A
title=http://www.tac.com/
href="http://www.tac.com/">www.tac.com</A><BR><BR></SPAN></U><SPAN
style="FONT-SIZE: 8pt; COLOR: black; FONT-FAMILY: Verdana">Notice: This email
message, together with any attachments, contains information of TAC, which may
be confidential, proprietary, copyrighted and/or legally privileged. This email
is intended solely for the use of the individual or entity named on the message.
If you are not the intended recipient, and have received this message in error,
please immediately return by email and then delete it.</SPAN> </P>
<P class=MsoNormal><?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p> </o:p></P>
<P class=MsoNormal><SPAN lang=EN-GB
style="FONT-SIZE: 18pt; COLOR: #1b7d0e; FONT-FAMILY: Webdings; mso-ansi-language: EN-GB">P</SPAN><SPAN
class=GramE><SPAN lang=EN-GB
style="FONT-SIZE: 18pt; COLOR: #1b7d0e; FONT-FAMILY: Arial; mso-ansi-language: EN-GB"> </SPAN><SPAN
lang=EN-GB
style="FONT-SIZE: 7.5pt; COLOR: #002cfe; FONT-FAMILY: Arial; mso-ansi-language: EN-GB">
</SPAN><SPAN lang=EN-GB
style="FONT-SIZE: 7.5pt; COLOR: #1b7d0e; FONT-FAMILY: Arial; mso-ansi-language: EN-GB">Please</SPAN></SPAN><SPAN
lang=EN-GB
style="FONT-SIZE: 7.5pt; COLOR: #1b7d0e; FONT-FAMILY: Arial; mso-ansi-language: EN-GB">
consider the environment before printing this e-mail. Thank
you.</SPAN></P></DIV>
<DIV> </DIV></BODY></HTML>