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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Finding, say, a 500-ton centrifugal chiller with a rated COP of
7.625 (6.1 required by ASHRAE * 1.25) is not going to be an easy task.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I think you should look at finding a chiller whose annual energy
consumption is 25% less than an ASHRAE 90.1 chiller (ie 25% “better”)…that’s a
much more reasonable expectation, given frictionless bearings, VFDs, etc.<o:p></o:p></span></p>
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LEED AP<o:p></o:p></span></b></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>amit
bhansali<br>
<b>Sent:</b> Thursday, March 25, 2010 12:56 PM<br>
<b>To:</b> Kimball, Matthew<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Chiller Efficiency<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal>Well, the baseline COP are measured at standard testing
conditions. So i am not debating the fact the COP would be constant. I just
needed to know that what does increase in 25% efficiency actuallu mean. I
personally thought having a chiller whose kw/ton was lower than that
recommended by ASHRAE 90.1 would be good. Needed to confirm that.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>Thanks for the input<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>On 25 March 2010 11:51, Kimball, Matthew <<a
href="mailto:Matthew.Kimball@jacobs.com">Matthew.Kimball@jacobs.com</a>>
wrote:<o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Maybe you can tell me what the COP of a chiller means then,
given that it varies with load, how do you come up with a single COP for a
chiller? Or is it just the average COP given the operating conditions
that the chiller experiences? Or are you talking about the integrated
part load value? </span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>But yes, however you define the efficiency, (COP, EER, or
Power/Ton), I am geussing that the load removed per unit of input will have to
increase by 25%.</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Matthew Kimball</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<div class=MsoNormal align=center style='text-align:center'>
<hr size=2 width="100%" align=center>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> <a
href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>amit bhansali<br>
<b>Sent:</b> Thursday, March 25, 2010 11:49 AM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] Chiller Efficiency</span><o:p></o:p></p>
<div>
<div>
<div>
<p class=MsoNormal><br>
Hi Bldg-Sim Community,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>I had a confusion that you all might be help out.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>When someone says that they want a chiller with 25% more
efficiency than the baseline dictated by ASHRAE 90.1, does it mean the COP
should be 25% greater?<br>
-- <br>
Thanks<br>
<br>
Sincerely,<br>
Amit Bhansali, M.S. , EIT<br>
Command Commissioning, LLC<br>
8410, Sterling St<br>
Irving, TX 75063 <br>
<br>
<a href="http://www.command-cx.com/">www.command-cx.com</a><br>
<br>
Please do not print this e-mail unless necessary<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><br>
<br>
<br>
-- <br>
Thanks<br>
<br>
Sincerely,<br>
Amit Bhansali, M.S. , EIT<br>
Command Commissioning, LLC<br>
8410, Sterling St<br>
Irving, TX 75063 <br>
<br>
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