<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1276" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=626522123-01122003><FONT face=Arial color=#0000ff size=2>I've
been looking for info on this subject for some time, with little success. There
seems to be lots of testing of combustion efficiency, but little info on jacket
losses and off cycle stack losses. Which makes it difficult to create accurate
DOE-2 boiler curves. But DOE-2's default curves, and in fact the whole boiler
simulation model, is, in my opinion, not particularly
accurate.</FONT></SPAN></DIV>
<DIV><SPAN class=626522123-01122003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=626522123-01122003><FONT face=Arial color=#0000ff size=2>I'll
be very interested in what you can find out.</FONT></SPAN></DIV>
<P><FONT size=2>Michael Wilson, P.Eng.<BR>Enerficiency Consulting<BR>455
Elphinstone Ave.<BR>Gibsons, BC, V0N 1V1<BR>604-886-9864 phone<BR>604-676-2604
fax (Vancouver local #)<BR>mwilson@enerficiency.ca</FONT> </P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> postman@gard.com
[mailto:postman@gard.com]<B>On Behalf Of </B>Jim Willson<BR><B>Sent:</B>
December 1, 2003 1:41 PM<BR><B>To:</B> BLDG-SIM@gard.com<BR><B>Subject:</B>
[BLDG-SIM] Determination of Boiler System Losses and
Efficiencies<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>TC 4.7 has been approached with a request for an
insight, studies, articles, or other sources that could assist them in
developing tools, intended for gas customer use, to
estimate:</FONT></DIV>
<DIV><FONT face=Arial
size=2> 1. Annual
Fuel Utilization Efficiency or Seasonal Boiler Efficiency</FONT></DIV>
<DIV><FONT face=Arial
size=2> 2. Cycling
losses</FONT></DIV>
<DIV><FONT face=Arial size=2>
3. Fuel savings of lowering the operating steam
pressure </FONT></DIV>
<DIV><FONT face=Arial size=2>
4. Efficiency reduction due to oversized boilers</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>This is an area that doesn't seem to get
discussed much in the building energy arena. I am interested to see what
develops. Please share anything you know.</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></FONT> </DIV>
<DIV><FONT face=Arial size=2>Jim Willson</FONT></DIV>
<DIV><FONT face=Arial size=2>Applications Subcommittee Chair TC
4.7</FONT></DIV><PRE>
==================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BLOCKQUOTE><PRE>
===========================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BODY></HTML>