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<TITLE>Major disagreement on Chiller Performance Curves in DOE-2.1E and DOE-2.2</TITLE>
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<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>
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<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>
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<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>
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