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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Jonathan,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I also recommend using a good load
calculation program for calculating the loads. Elite CHVAC seems to meet
the criteria well and not be so complicated that errors get introduced merely
from confusion. Load calculation programs are designed for a different purpose
than energy modeling programs. The design intent is to estimate the load
on the building at specific weather and internal conditions and be reasonably
close to the worst case load at those given conditions for the purpose of selecting
equipment. An energy modeling program is designed to give results that
match the energy consumption of the building and thus is more focused on a
dynamic situation. They might use TMY weather data that doesn’t
match the % load exceedance that would be the goal of a load calculation (the
ASHRAE 97-1/2% and 2-1/2% conditions for example). Often the program is
tweaked to get the result to match existing utility bills, or to model a system
that it was not programmed to handle. There are a lot of dynamic
variables that cannot be precisely defined, such as occupancy patterns, mass
influence, lighting and equipment loads and schedules, and so on. The
energy modeling programs thus need to be more complicated, and therefore are
more susceptible to errors from confusion, lack of systems understanding and
experience regarding inputs, or programming errors not yet fixed. When
drawings are imported from a CAD program, there is even more potential for
input error as the black box tries to put that into the appropriate format for
a load calculation.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I would certainly be great to have
programs that we have more confidence in to perform both energy and load calculations.
I’m hopeful that soon that will happen. We sure could make good use
of tools like that.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=navy face="Monotype Corsiva"><span
style='font-size:12.0pt;font-family:"Monotype Corsiva";color:navy'>Michael
Haughey, P.E., LEED AP<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Monotype Corsiva"><span
style='font-size:12.0pt;font-family:"Monotype Corsiva";color:navy'>Silvertip
Integrated Engineering Consultants</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Monotype Corsiva"><span
style='font-size:12.0pt;font-family:"Monotype Corsiva";color:navy'>303-650-1080</span></font><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Monotype Corsiva"><span
style='font-size:12.0pt;font-family:"Monotype Corsiva";color:navy'>mhaughey@earthlink.net</span></font><o:p></o:p></p>
</div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b><span style='font-weight:bold'>On Behalf Of </span></b>W. Peter Anderson<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, January 25, 2008
2:52 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Jonathan Curtin;
bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] Load Calcs
with Energy Simulation Software</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Jonathan-</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Greetings. I have a little experience in CHVAC and
slightly more in eQuest, and here is my $0.02 worth.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If your objective is sizing equipment, developing detailed
zone loads for system and equipment sizing, CHVAC is, in my opion the much
better way to go. I found it easy to set up zones, create
systems, and the output is very well oraganized in terms of providing the
design engineer with the information they need.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>To try and do the same thing in eQuest is much more
difficult and time consuming than CHAVC. Furthermore, the program inputs
outputs are focused on energy use. The system sizing information is not
as easy to locate and discern as in CHVAC.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Again, bare in mind I am new to both these programs.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This forum (Bldg-sim) will get you many other worthy
opinions, I hope mine helps.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards and good luck.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>W. Peter Anderson, P.E<br>
JP Engineering<br>
<st1:Street w:st="on"><st1:address w:st="on">41 Mechanic Street</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Windsor</st1:City>, <st1:State w:st="on">CT</st1:State>
<st1:PostalCode w:st="on">06095</st1:PostalCode></st1:place><br>
Ph: 860/688-5223<br>
Fax: 860/688-5269</span></font><o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:jcurtin@WylieAssociates.com" title="jcurtin@WylieAssociates.com">Jonathan
Curtin</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:bldg-sim@lists.onebuilding.org"
title="bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Friday, January
25, 2008 4:24 PM<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> [Bldg-sim] Load
Calcs with Energy Simulation Software<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello All,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Would anyone out there like to share experiences or
precautions in using simulation models (particularly eQuest, DOE2.1e,
EnergyPlus) for load calculations? Any advantages/disadvantages, tricks,
or warnings in using these simulation models as opposed
to dedicated load calculation software like Elite's CHVAC? Any studies
comparing the two?</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><b><font size=2 color="#4d4d4d" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#4D4D4D;font-weight:bold'>Jonathan
Curtin EIT, LEED AP</span></font></b><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=4 color="#4d4d4d" face=Arial><span
style='font-size:14.0pt;font-family:Arial;color:#4D4D4D'>W Y
L I E</span></font><font size=4 face=Arial><span style='font-size:
14.0pt;font-family:Arial'> <br>
</span></font><font size=1 color=maroon face=Arial><span style='font-size:8.0pt;
font-family:Arial;color:maroon'>C O N S U L T I N G<br>
E N G I N E E R S<br>
</span></font><font size=1 color=maroon face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:maroon'><br>
</span></font><b><font size=1 color="#4c4c4c" face=Arial><span
style='font-size:8.0pt;font-family:Arial;color:#4C4C4C;font-weight:bold'>6161 <st1:State
w:st="on">Savoy</st1:State>, <st1:address w:st="on"><st1:Street w:st="on">Suite</st1:Street>
700</st1:address> <st1:place w:st="on"><st1:City w:st="on">Houston</st1:City>,
<st1:State w:st="on">Texas</st1:State> <st1:PostalCode w:st="on">77036</st1:PostalCode></st1:place><br>
713.781.2526 713.781.2536 fax<br>
<br>
</span></font></b><font size=1 face=Arial><span style='font-size:7.0pt;
font-family:Arial'><a href="http://www.wylieassociates.com/"
title="http://www.wylieassociates.com/">www.wylieassociates.com</a></span></font><o:p></o:p></p>
</div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>_______________________________________________<br>
Bldg-sim mailing list<br>
Bldg-sim@lists.onebuilding.org<br>
http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org<o:p></o:p></span></font></p>
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