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<DIV> </DIV>
<DIV style="FONT: 10pt arial">----- Original Message -----
<DIV style="BACKGROUND: #e4e4e4; font-color: black"><B>From:</B> <A
title=panderson@jpengineer.com href="mailto:panderson@jpengineer.com">W. Peter
Anderson</A> </DIV>
<DIV><B>To:</B> <A title=bbishop@PathfinderEngineers.com
href="mailto:bbishop@PathfinderEngineers.com">Bishop, Bill</A> </DIV>
<DIV><B>Sent:</B> Monday, May 19, 2008 2:48 PM</DIV>
<DIV><B>Subject:</B> Re: [Bldg-sim] Scroll Chiller</DIV></DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Thanks Bill, that is correct. Scrolls
(reciprocating, screw) ARE positive displacment compressors.
<BR></FONT></DIV>
<DIV><FONT face=Arial size=2>As I was writting I had a sense I typed this
incorrectly. But I knew what I meant and did not read what I
wrote.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If anyone cares to learn more, read ASHRAE
Handbook Chapter S34 for details.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Peter</DIV></FONT>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bbishop@PathfinderEngineers.com
href="mailto:bbishop@PathfinderEngineers.com">Bishop, Bill</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=panderson@jpengineer.com
href="mailto:panderson@jpengineer.com">W. Peter Anderson</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, May 19, 2008 2:19 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: [Bldg-sim] Scroll
Chiller</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Did you mean to say
that centrifugal chillers do <I><SPAN
style="FONT-STYLE: italic">not</SPAN></I> have positive displacement
compressors?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><B><FONT face="Franklin Gothic Medium" color=black
size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Franklin Gothic Medium'">William
Bishop</SPAN></FONT></B><B><FONT face="Franklin Gothic Medium Cond"
color=black size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Franklin Gothic Medium Cond'">,
EIT, LEED<SUP>®</SUP> AP</SPAN></FONT></B><B><FONT
face="Franklin Gothic Medium Cond" color=#003300 size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: #003300; FONT-FAMILY: 'Franklin Gothic Medium Cond'">
</SPAN></FONT></B><B><FONT face="Franklin Gothic Medium Cond" color=green
size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: 'Franklin Gothic Medium Cond'">|</SPAN></FONT></B><B><FONT
face="Franklin Gothic Medium Cond" color=#003300 size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: #003300; FONT-FAMILY: 'Franklin Gothic Medium Cond'">
</SPAN></FONT></B><B><FONT face="Franklin Gothic Medium Cond" color=black
size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Franklin Gothic Medium Cond'">Pathfinder
Engineers LLP<o:p></o:p></SPAN></FONT></B></P>
<P class=MsoNormal><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial">Mechanical
Engineer<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=#003300 size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: #003300; FONT-FAMILY: Arial"><BR></SPAN></FONT><st1:address
w:st="on"><st1:Street w:st="on"><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial">3300 Monroe Ave.,
Suite 306</SPAN></FONT></st1:Street><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial"> <BR><st1:City
w:st="on">Rochester</st1:City>, <st1:State w:st="on">NY</st1:State>
<st1:PostalCode
w:st="on">14618</st1:PostalCode></SPAN></FONT></st1:address><B><FONT
face="Franklin Gothic Medium" color=#003300 size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: #003300; FONT-FAMILY: 'Franklin Gothic Medium'"><o:p></o:p></SPAN></FONT></B></P>
<P class=MsoNormal><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial">TEL (585)
218-0730 Ext. 114<BR>FAX (585) 218-0737 <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial"><A
href="mailto:bbishop@pathfinderengineers.com">bbishop@pathfinderengineers.com</A><o:p></o:p></SPAN></FONT></P>
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style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"><A
href="http://www.pathfinderengineers.com">www.pathfinderengineers.com</A></SPAN></FONT><FONT
face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P>
<P><FONT face=Webdings color=green size=5><SPAN
style="FONT-SIZE: 18pt; COLOR: green; FONT-FAMILY: Webdings">P</SPAN></FONT><FONT
face=Arial color=navy><SPAN style="COLOR: navy; FONT-FAMILY: Arial">
</SPAN></FONT><FONT face=Arial color=green size=1><SPAN
style="FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: Arial">Please consider the
environment before printing this email</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
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<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>W. Peter
Anderson<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, May
19, 2008 1:39 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Eric
Youngson; bldg-sim@lists.onebuilding.org<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [Bldg-sim] Scroll
Chiller</SPAN></FONT><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT face=Calibri size=2><SPAN
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Not having looked too closely at
the options, I would suggest not centrifugal. </SPAN></FONT><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Centrifugals are almost
always water cooled, have modulating capabilites from10% to 100% capacity, and
generally dont go below 200 tons capacity. They are positive displacment
compressors and will follow the "fan laws", meaning there is a cubic
relationship between energy used and cooling capacity (tons). Similar to
a centrifugal pump and fan.</SPAN></FONT><FONT face="Times New Roman"
size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Scrolls are (until the very near
future) air cooled and on/off control. They are staged. You wont
see them over about 150 tons total chiller size. Part load
capacity is pretty constant, in terms of kW/ton. There are usually
multiple stages. At 50% load, half the compressors (therefore power
requirement) is used.</SPAN></FONT><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Generally speaking, scroll IPLVs
run about 1.1 kW/ton</SPAN></FONT><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">water cooled centrifguals operate
at around .50 kW/ton. But cooling towers need to be added, as well as
condenser water pumps. </SPAN></FONT><FONT face="Times New Roman"
size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Lots of variables to
consider. </SPAN></FONT><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hope this was
helpful.</SPAN></FONT><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">W. Peter Anderson, P.E<BR>JP
Engineering<BR><st1:Street w:st="on"><st1:address w:st="on">41 Mechanic
Street</st1:address></st1:Street><BR><st1:place w:st="on"><st1:City
w:st="on">Windsor</st1:City>, <st1:State w:st="on">CT</st1:State>
<st1:PostalCode w:st="on">06095</st1:PostalCode></st1:place><BR>Ph:
860/688-5223<BR>Fax: 860/688-5269</SPAN></FONT><FONT face="Times New Roman"
size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"> <o:p></o:p></SPAN></FONT></P></DIV>
<BLOCKQUOTE
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt 3.75pt; BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: medium none">
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">----- Original Message -----
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV style="font-color: black">
<P class=MsoNormal style="BACKGROUND: #e4e4e4"><B><FONT face=Arial
size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">From:</SPAN></FONT></B><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> <A
title=ericy@pae-engineers.com href="mailto:ericy@pae-engineers.com">Eric
Youngson</A> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><B><FONT face=Arial size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">To:</SPAN></FONT></B><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> <A
title=bldg-sim@lists.onebuilding.org
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</A>
<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><B><FONT face=Arial size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Sent:</SPAN></FONT></B><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> Monday,
May 19, 2008 12:47 PM<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><B><FONT face=Arial size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Subject:</SPAN></FONT></B><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
[Bldg-sim] Scroll Chiller<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p> </o:p></SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT face=Calibri size=2><SPAN
style="FONT-SIZE: 11pt">SIM List,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri size=2><SPAN
style="FONT-SIZE: 11pt">
I need to model a scroll chiller (. Does anyone have an opinion on which
eQUEST chiller is a reasonable choice for this? I was thinking that
centrifugal would be the closest but this is simply based on mechanical
operation. I would like to choose the closest model based on
performance.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri size=2><SPAN
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face="Times New Roman"
size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'"><o:p> </o:p></SPAN></FONT></P>
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size=2><SPAN style="FONT-SIZE: 11pt"><A
href="http://www.pae-engineers.com/"><FONT face="Times New Roman"
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<P class=MsoNormal style="mso-element: frame"><FONT face=Verdana
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<st1:place w:st="on">Main</st1:place><BR>503.542.0567
Direct<BR>503.226.2930 Fax<BR>ericy@pae-engineers.com
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Third Avenue</SPAN></FONT></st1:address></st1:Street><FONT
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<st1:address w:st="on"><st1:Street w:st="on">Suite</st1:Street>
300</st1:address><BR><st1:place w:st="on"><st1:City
w:st="on">Portland</st1:City>, <st1:State w:st="on">OR</st1:State>
<st1:PostalCode
w:st="on">97204-2426</st1:PostalCode></st1:place><BR>www.pae-engineers.com</SPAN></FONT><FONT
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