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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#0000B4'>To build on what Alan said below, another factor to consider is your
heat load in the space. If you have a lab minimum ventilation requirement of
6ACH, with an equipment heat gain of 10w/ft2 in addition to lights, people and
solar loads (not uncommon) you are likely going to be running the supply air at
close to 11-12 ACH with an all-air system. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#0000B4'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#0000B4'>If your equipment load is lower – let’s say 3w/ft2, then your
likely going to see the same volume of air supplied, and you probably will not
see the fan energy reduction. There is a slight increase in static pressure at
the DOAS to supply the air. The chilled beams themselves shouldn’t have any fan
energy usage. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#0000B4'><o:p> </o:p></span></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto'><b><span style='font-family:
"Garamond","serif"'>Vikram Sami,</span></b><span style='color:#0000B4'> </span><span
style='font-family:"Garamond","serif"'>LEED AP</span><span style='color:#0000B4'>
<br>
</span><span style='font-family:"Garamond","serif"'>Direct Phone 404-253-1466 |
Direct Fax 404-253-1366</span><span style='color:#0000B4'> <o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Jackson,
Alan<br>
<b>Sent:</b> Thursday, November 12, 2009 12:10 PM<br>
<b>To:</b> Jacob Goodman<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Active Chilled Beam savings?<o:p></o:p></span></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Jacob<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'>Myself and many others have modeled these types of systems, both
under eQuest as well as Energyplus. If you aren’t showing fan savings you
may want to verify that in fact you are able to specify smaller HP motors at
the DOAU due to the decrease in overall volume flow rates vs standard air
recirculation systems. If you system design does show a lower HP supply fan at
the unit then there may indeed be a modeling error on the runtime of the fans
or something else. It is not easy to say without more detail. <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 style='margin-bottom:12.0pt;line-height:15.0pt'><span
style='font-size:8.0pt;font-family:"Arial Black","sans-serif";color:#1F497D'>Alan
Jackson, LEED AP<br>
KlingStubbins</span><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><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";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'>
equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Jacob Goodman<br>
<b>Sent:</b> Thursday, November 12, 2009 12:02 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Active Chilled Beam savings?<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Has anyone successfully shown energy savings due to an
Active Chilled Beam airside system, as compared to a series VAV or other
baseline? I haven't been able to model the fan (or any system) energy savings
that several white papers claim.The last sim list discussion of this was in
2006 anything new?<o:p></o:p></p>
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<p class=MsoNormal><br>
<b><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Jacob
Goodman </span></b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#666666'>, LEED AP</span><o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
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