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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I have had the same problem when I let EQUEST automatically size
the boiler for me. In my situation, EQUEST drastically oversized the
boiler so it was running at 10% capacity 90% of the time. You can check
to see if you have the same problem by looking at report PS-C to see what part
load range your boiler is operating at. To fix the problem, first I
manually set the capacity of the boiler, which helped a lot, but the program was
still over estimating the energy consumption. Then, I created a custom
performance curve using actual data for my boiler. That solved my
problem.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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"'> Josh Doherty
[mailto:jdoherty@dcengineering.net] <br>
<b>Sent:</b> Tuesday, June 16, 2009 10:14 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] High boiler energy use compared to HW loop
demand<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
have a situation where my boiler energy use (= 950 MBtu) is extremely high
compared to the hot water loop demand = 550 MBtu. The modeled efficiency
of the boiler is 80%...which should result in an estimated 690 MBtu of boiler
energy use. Any ideas what could be going on here? Thanks.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><strong>Josh Doherty</strong><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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