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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Steve,<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Glad to hear this, as this will be a good feature for eQuest.
In the past when we’ve performed analysis on condensing boilers, we used
performance data from Aerco’s website, such as: <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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a href="http://www.aerco.com/products/benchmark3-specs.shtml">http://www.aerco.com/products/benchmark3-specs.shtml</a><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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>There is a link at the top for the efficiency curves that take
into account return temperature and part load. You should check with
Aerco regarding using the data, but I’m sure you guys could work out a
deal with them and other boiler manufacturers, similar to what you guys did
with ClimateMaster, to enable us to use custom curves for specific boilers.<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>It would be nice to have the capability to directly simulate the
condensing boilers in eQuest. It would save us a bunch of additional
steps that we currently use. The current method we use for simulating
condensing boilers is to first pull all hourly heating load and temperature
data into a spreadsheet. Then, we calculate the efficiency for each hour
based on the load and temp conditions, and the Aerco performance curves.
Then, we use all of those calcs to calculate the annual average efficiency, and
then we enter that number into eQuest along with a custom PLR curve and zero
standby and start-up times. The custom PLR curve is a “y = m*x + B”
type where m = 1 and B = 0 so that the effects of part load are eliminated,
since my annual average efficiency number already takes this into account.
I believe this is similar to what Marlin showed us in a training
class about 2 years ago.<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>We usually come up with annual average efficiencies of about 90
to 91 %, which seem reasonable. Higher efficiencies are available in
theory, but they bump up against the fact that there is usually not much
heating load when you can get away with the lower temperatures required for the
higher efficiencies. Therefore, the really high efficiencies (when
present) don’t have much of an effect on the annual average number.<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hope this helps!<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>One question; if you guys are in the process of adding a few
bells and whistles to the eQuest program, would you mind if we (eQuest-users) submitted
additional “wish lists” items via this forum?<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks!<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Regards,<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>James<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><i><span style='font-size:10.0pt;color:#00B050'>James
A. Hess, PE, CEM</span></i></b><span style='color:#00B050'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>Energy
Engineering Team Leader</span><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>TME, Inc.</span><span
style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>5800 Evergreen
Drive</span><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>Little Rock,
AR 72205</span><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.5pt;color:#1F497D'>ph 501-666-6776</span><span
style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.5pt;color:#1F497D'>fax
501-663-8888<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.5pt;color:#1F497D'>cell
501-351-4667</span><span style='font-size:7.5pt;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><u><span style='font-size:7.5pt;color:blue'><a
href="mailto:email@tmecorp.com">jhess@tmecorp.com</a></span></u><u><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></u></p>
<p class=MsoNormal><u><span style='font-size:7.5pt;color:blue'><a
href="http://www.tmecorp.com/">www.tmecorp.com</a><o:p></o:p></span></u></p>
</div>
<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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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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"'>
equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Steven Gates<br>
<b>Sent:</b> Tuesday, June 24, 2008 7:32 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Spam:[Equest-users] eQUEST condensing boiler<o:p></o:p></span></p>
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</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
eQUEST development team is in the process of implementing a condensing boiler.
We are looking for performance data, both for the effect of entering
temperature on fuel consumption, as well as the impact of part load operating
conditions on fuel consumption. If you have information you are willing
to share, please contact me.<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><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>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><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Steve
Gates<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>(916)
638-1203<o:p></o:p></span></p>
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