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<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff size=2>You
are pretty limited in what you can do here.</FONT></SPAN></DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff size=2>The
Lake/Well condenser water option is only for heat pumps and not for water cooled
chillers.</FONT></SPAN></DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff size=2>The
obvious problem with using a cooling tower and simply setting the fan energy to
zero is you don't get to take advantage of the improved chiller performance as a
result of using colder condenser water. </FONT></SPAN></DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff size=2>One
work around might be: </FONT></SPAN></DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff
size=2>Assuming the lake/well is going to supply a pretty constant condenser
water temperature, say 55-60F. You could try setting up a condenser loop
that always supplies water at a constant temperature say 85F using a
cooling tower with fan energy set to zero. To capture the improved
performance of the chiller modify the chiller performance curves so that the
performance at 85F matches the expected performance with the lake/well water at
55F-60F. </FONT></SPAN></DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=205483717-30112006><FONT face=Arial color=#0000ff size=2>This
approach should give you a reasonable answer if you calibrate it
correctly.</FONT></SPAN></DIV><!-- Converted from text/rtf format -->
<P><SPAN lang=en-us><FONT face="Swis721 Blk BT" size=2>Michael Tillou,
PE</FONT></SPAN> <BR><SPAN lang=en-us><FONT face="Swis721 Blk BT" size=1>ETC
Group, Inc - Energy Engineering for a Sustainable Future</FONT></SPAN> <BR></P>
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<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
bldg-sim@gard.com [mailto:bldg-sim@gard.com] <B>On Behalf Of </B>Jaya
Mukhopadhyay<BR><B>Sent:</B> Wednesday, November 29, 2006 5:59
PM<BR><B>To:</B> bldg-sim@gard.com<BR><B>Subject:</B> [bldg-sim] Using Sea /
Lake Water as Condenser Water<BR><BR></FONT></DIV>
<DIV>We are proposing a system which uses sea water as
condenser water thus eliminating the use of a cooling tower. I am trying to
model this system in eQuest. </DIV>
<DIV>The following are the errors which I get on running the
program:</DIV>
<DIV>1) The program throws up an error asking for a primary cooling equipment
when I simply run the 'Lake Water' option for the condenser water loop.</DIV>
<DIV> 2) The program does not accept the 'Lake water' option for the
condenser water loop when run along with a cooling tower the program. I
receive an incompatibility message.</DIV>
<DIV>Is there a way I can model such an arrangement? </DIV>
<DIV>If not!</DIV>
<DIV>Is there a way in which I can trick the program to simulate such an
arrangement?</DIV>
<DIV>Any help and/or advice would be greatly appreciated.</DIV>
<DIV>Thank you</DIV>
<DIV>Jaya Mukhopadhyay</DIV>
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