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<DIV><SPAN class=340042919-15102003>The easy way to settle that is to create a
spreadsheet that uses the coefficients. You can get them from the .bdl
file if you enter DIAGNOSTIC COMMENTS .. right before your chiller
instructions. Interestingly enough, that's what I was doing this
morning. I have attached my spreadsheet. Please excuse that it is
not ready for distribution. Just something I was playing
with.</SPAN></DIV>
<DIV><SPAN class=340042919-15102003></SPAN> </DIV>
<DIV><SPAN class=340042919-15102003>The coefficients are for DOE-2.2 and do
include upgrades since the mid '70s that DOE-2.1E uses. The VFD
coefficients are new.</SPAN></DIV>
<DIV><SPAN class=340042919-15102003></SPAN> </DIV>
<DIV><SPAN class=340042919-15102003>
<DIV><SPAN class=340042919-15102003>As you can see, kW/ton does change with
temperatures.</SPAN></DIV>
<DIV><SPAN class=340042919-15102003></SPAN> </DIV>If you want FIXED
condenser water temperature and chilled water temperature (the default), do not
turn on the resets. Condenser water (and maybe chilled water) will still
drift with what the equipment can do.</SPAN></DIV>
<DIV><SPAN class=340042919-15102003></SPAN> </DIV>
<DIV><SPAN class=340042919-15102003>Mike</SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> postman@gard.com
[mailto:postman@gard.com]<B>On Behalf Of </B>Aulbach, John<BR><B>Sent:</B>
Wednesday, October 15, 2003 1:23 PM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Major disagreement on Chiller
Performance Curves in DOE-2.1E and DOE-2.2<BR><BR></FONT></DIV>
<P><FONT size=2>I am having a "friendly" disagreement with a colleague on what
chiller curves to ask for from a manufacturer to input into DOE-2 (could be
either 2.1E or 2.2). We both agree that the infamous ARI point for a 100% load
should be input. But the curves are where we disagree.</FONT></P>
<P><FONT size=2>Is the Default DOE-2 curve for % Power versus % Tons the ARI
curve with the allowable reduction in condenser water temperature, or is it
based on the FIXED 85°F entering condenser water and FIXED 44°F leaving
chilled water ALL the way down the curve?</FONT></P>
<P><FONT size=2>Therefore, when I am given a chiller with a variable speed
drive installed, what parameters should I ask for in such a Power/Tons to be
FIXED ???</FONT></P><BR><BR><BR><BR>
<P><FONT size=2>John R. Aulbach, PE, CEM</FONT> <BR><FONT size=2>Project
Engineer</FONT> <BR><FONT size=2>Sempra Energy Solutions</FONT> <BR><FONT
size=2>555 West Fifth Street</FONT> <BR><FONT size=2>Mail Location 27F3</FONT>
<BR><FONT size=2>Los Angeles, CA 90013</FONT> <BR><FONT size=2>Tel: (213)
244-8551 Cell (213) 219-4875</FONT> <BR><FONT size=2> </FONT> </P>
<P><FONT size=2>"Sempra Energy Solutions is not the same company as SDG&E/
SoCalGas, the Utilities. Sempra Energy Solutions is not regulated by the
California Public Utilities Commission, and you do not have to buy Sempra
Energy Solutions products or services to continue to receive quality regulated
service from the Utilities." </FONT></P><PRE>
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