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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'>I have personally never seen fan power
equal the total of cooling and heating power, except in certain climate zones
where an economizer can run often or when the exhaust/ventilation fan power,
not associated with cooling/heating, is high.<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'>Not sure if you are stilling looking for help
here. <span style='mso-spacerun:yes'> </span><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'>What does your fan schedule look like?<span
style='mso-spacerun:yes'> </span>Is your fan set to run 24 hrs?<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'>What climate zone are you in? <span
style='mso-spacerun:yes'> </span>What are your space cooling and heating temperature
set-points?<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 style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>M. Shields<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 06, 2011
3:22 PM<br>
<b><span style='font-weight:bold'>To:</span></b>
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] 90.1
Supply Fan Energy</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'>Hi all,<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'>I am in the process of breaking out the fan energy
from my HVAC system per ASHRAE 2004 G3.1.2.1, following G3.1.2.9. The
amount of energy coming from my fans seems massive and I’m not sure if
that is typical, or if I’ve messed something up. I started by
setting the temperature difference of 20 degrees between supply and desired
temp (55/75 cooling and 90/70 for heating) and specified 62.1-2004 ventilation
for outside air. I then ran equest and used the SV-A reports to get
supply CFM for each system. From that number I then used Table G3.1.2.9
to get BHP for each system, which I then converted to kW using the formula in
ASHRAE. I then took that number and divided by CFM to get kw/CFM and
entered this number on the system->fan tab. When I go to the SV-A
report the system kW is exactly what I calculated it to be, but the energy
required for my ventilation fans is about the same as my heating and cooling
load combined, which seems outrageous. <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'>Is this typical? Have I entered it In the wrong way?
I would think fan consumption would typically be a fraction of the actually
heating and cooling energy. Thanks for any thoughts.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Book Antiqua"><span
style='font-size:10.0pt;font-family:"Book Antiqua"'>____________________________<br>
Michael Shields<br>
Facility Strategies Group, LLC<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Book Antiqua"><span
style='font-size:10.0pt;font-family:"Book Antiqua"'>1012 Market Street, Suite
307<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Book Antiqua"><span
style='font-size:10.0pt;font-family:"Book Antiqua"'>Fort Mill, SC 29708<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Book Antiqua"><span
style='font-size:10.0pt;font-family:"Book Antiqua"'>Phone: 803-493-4507<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Book Antiqua"><span
style='font-size:10.0pt;font-family:"Book Antiqua"'>Fax: 803-548-2511<br>
Email: <a href="mailto:mshields@fstrategies.com">mshields@fstrategies.com</a><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Calibri><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
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