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<DIV align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=595170820-19122006>Folks:</SPAN></FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=595170820-19122006></SPAN></FONT> </DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=595170820-19122006>eQuest (as did its predecessor DOE-2.1) use three basic
curves to define chiller performance:</SPAN></FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=595170820-19122006></SPAN></FONT> </DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=595170820-19122006><STRONG>1) EIR-FT</STRONG></DIV>
<DIV align=left>
<P class=MsoBodyText>Takes the U-name of a curve that adjusts the electric input
ratio as a function of the leaving chilled water temperature and the condenser
temperature. This curve should be normalized to 1.0 at the ARI point
(RATED-CHW-T, RATED-COND-T, etc.). </P>
<H5>2) EIR-FPLR</H5>
<P class=MsoBodyText>Takes the U-name of a curve that adjusts the electric input
ratio as a function of</P>
<P class=MsoListNumber
style="MARGIN-LEFT: 18pt; tab-stops: 36.0pt"> <U>The
part load ratio (PLR)</U> – The PLR is defined as the ratio of the hourly
load to the hourly capacity; Load / Cap<SUB>hour</SUB></P>
<P class=MsoListNumber
style="MARGIN-LEFT: 18pt; tab-stops: 36.0pt"> <U>The
evaporator/condenser dT</U> - The temperature differential between the
condenser and leaving chilled-water. The meaning of the condenser
temperature varies according to condenser type. </P></SPAN></FONT></DIV>
<DIV align=left>
<H5><FONT face=Arial><FONT color=#0000ff><SPAN class=595170820-19122006>3)
</SPAN>CAPACITY-FT</FONT></FONT></H5>
<P class=MsoBodyText><FONT face=Arial color=#0000ff size=2>Takes the U-name of a
curve that adjusts the capacity of the chiller as a function of the leaving
evaporator water temperature and the condenser temperature. This curve should be
normalized to 1.0 at the rated conditions (RATED-CHW-T, RATED-COND-T,
etc.).</FONT></P>
<P class=MsoBodyText><SPAN class=595170820-19122006><FONT face=Arial
color=#0000ff size=2>MY understanding is the the EIR-FPLR was always to be the
part load curve based on a constant condenser water entering temperature (say
85°F) and that the program would use the other two curves to modify this based
on other chilled and condenser water conditions.</FONT></SPAN></P>
<P class=MsoBodyText><SPAN class=595170820-19122006><FONT face=Arial
color=#0000ff size=2>NOW I see a new equation (new to me) in eQuest that I
can apparently put in the ARI curve of a chiller (based on ARI prescribed
condenser water relief) and the program will accept that.</FONT></SPAN></P>
<P class=MsoBodyText><SPAN class=595170820-19122006><FONT face=Arial
color=#0000ff size=2>Is this anyone else's
understanding?</FONT></SPAN></P></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>John R. Aulbach, PE,
CEM</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2><EM>Project
Manager</EM></FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>Nexant, Inc.</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>100 North Barranca, Suite
820</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>West Covina, CA 91791
USA</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>Phone:
626-430-9054</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>Fax:
626-430-9060</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>email: </FONT><A
title=mailto:jaulbach@nexant.com href="mailto:jaulbach@nexant.com"><FONT
face=Arial size=2>jaulbach@nexant.com</FONT></A></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV></DIV></DIV><PRE> </PRE><PRE>
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