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<p class=MsoNormal><span style='color:#1F497D'>I’ve usually seen this
metric as chilled water usage at the building vs. chiller energy. This goes in
line with installing a Btu meeting for a campus chilled water system, so you
can define the chilled water energy used at the building, similar to district
steam.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#1F497D'>Mark Nieman, PE, CEM | McKinstry | Sr. Energy Engineer</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'> <br>
</span><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#1F497D'>d 206.832.8152 | m 206.510.4760 | f 206.832.8552</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'> <br>
</span><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#474747'>FOR THE</span><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:#1F497D'> </span></b><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#365F91'>LIFE</span></b><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#474747'> OF YOUR BUILDING</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:#1F497D'> </span><span
style='color:#1F497D'><o:p></o:p></span></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>Sami,
Vikram<br>
<b>Sent:</b> Friday, September 10, 2010 1:23 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] A Question about chilled water usage<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’m looking at utility data for a building on a
college campus that has a central utility plant. They list cooling energy in
ton-hrs and It seems really high for all buildings across the board. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>However – if you assume that ton-hrs is the metered
chilled water usage and not the chiller energy, its not that bad. For example
if the chilled water usage is 1 ton-hrs, that’s 12,000 BTU’s of
cooling energy delivered. However, if whats being measured is chilled water
usage (and not chiller energy), then 1 ton-hr is not the energy consumed by the
chiller – that should be 12,000BTU/COP of the chiller. So if the chiller
COP is 4 – then that’s only 3,000 BTU’s of energy consumed to
deliver that ton-hr.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So – to get to the point – does anyone know if
campuses monitor their chilled water usage (in ton-hrs) as chiller energy or
cooling delivered?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>(I hope this makes snese)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='text-autospace:none'><b><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray'>Vikram Sami</span></b><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:gray'>, LEED AP<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray'>Sustainable Design Analyst<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray'>1382 Peachtree St. NE, Atlanta, GA
30309<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray'>t: 404-443-7462
f: </span><span lang=ES style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:gray'>404.892.5823 </span><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray'> e:
vikram.sami@perkinswill.com </span><a
href="http://www.perkinswill.com/"><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:gray;text-decoration:none'>www.perkinswill.com</span></a><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:gray'><o:p></o:p></span></p>
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style='font-size:9.0pt;font-family:"Arial","sans-serif";color:gray'>Perkins+Will.</span></b><span
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style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#ADD425'>Ideas +
buildings that honor the broader goals of society</span><span style='font-size:
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