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<p class=MsoNormal><span style='color:#1F497D'>Thanks Jeff, that’s I good point.
I appreciate your summary of the differences between those report types.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>In my particular case the “major”
differences I’ve encountered between LOAD and SYSTEM were much larger than what’s
reasonable for ventilation/exhaust/economizer.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Any thoughts?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>SP Henry-“the tired
troubleshooter”<o:p></o:p></span></p>
<p class=MsoNormal><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"'> Jeff Haberl
[mailto:jhaberl@tamu.edu] <br>
<b>Sent:</b> Tuesday, March 24, 2009 7:36 PM<br>
<b>To:</b> Sean Henry; 'bldg-sim@lists.onebuilding.org'<br>
<b>Subject:</b> Re: [Bldg-sim] DOE2 peak loads and equipment sizing<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Whoa!<br>
<br>
Hugh differences by design!<br>
<br>
LOADS reports are just that...space heating and cooling loads plus assigned
electric loads, which includes occupants, schedules, etc. All at constant
thermostat temps for each SPACE. <br>
<br>
SYSTEM loads are the loads on the air-side systems, which are system dependent,
and include ventilation loads, exhaust fans, thermostats, economizers, etc. <br>
<br>
PLANT adds yet another layer of equipment, etc.<br>
<br>
Therefore, values from SYSTEMS or PLANT are best used for sizing depending on
system type. <br>
<br>
Jeff <br>
BB 8=! 8=) :=) 8=) ;=) 8=) 8=( 8=) :=') 8=) 8=) 8=? BB <br>
<br>
Jeff S. Haberl, Ph.D., P.E., FASHRAE...................jhaberl@esl.tamu.edu <br>
<br>
Professor......................................................Office Ph:
979-845-6507 <br>
<br>
Department of Architecture.......................Lab Ph: 979-845-6065 <br>
<br>
Energy Systems Laboratory.......................FAX: 979-862-2457 <br>
<br>
Texas A&M University..............................77843-3581 <br>
<br>
College Station, Texas, USA.......................URL: www-esl.tamu.edu <br>
<br>
BB 8=/ 8=) :=) 8=) ;=) 8=) 8=() 8=) 8=? 8=) 8=) 8= BB </span><o:p></o:p></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 <br>
<b>To</b>: bldg-sim@lists.onebuilding.org <br>
<b>Sent</b>: Tue Mar 24 18:12:48 2009<br>
<b>Subject</b>: [Bldg-sim] DOE2 peak loads and equipment sizing </span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal>Dear Bldg-Sim users,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>In DOE2 , have any users come across major differences
between building peak cooling loads (in the LS-D reports) and the maximum
cooling loads listed in the SS-D reports?<o:p></o:p></p>
<p class=MsoNormal>I’m troubleshooting equipment sizing in a DOE2 model and I’m
trying nail down some reasonable explanations for the disparities in the loads.
<o:p></o:p></p>
<p class=MsoNormal>I would appreciate any words of wisdom.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>SP Henry<o:p></o:p></p>
<p class=MsoNormal>Glumac<o:p></o:p></p>
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