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<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></FONT></DIV>
<DIV> </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
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