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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Restore your default values.<span
style='mso-spacerun:yes'> </span><span class=SpellE>Equest</span> will
use either, static pressure with the airflow quantity and efficiencies to calc
fan power, or KW/CFM and the airflow quantity.<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'>Right click on the static in WG box and click
restore default.<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>Brian Goldsmith<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 07, 2011
10:47 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Jeremy Poling; Carol Gardner;
Paul Diglio<br>
<b><span style='font-weight:bold'>Cc:</span></b>
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] 90.1
Supply Fan Energy</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>I am trying to model a
CAV 90.1 baseline system 4, but it won’t let me input kW/cfm, just static
and efficiency. The default static value is 1.25, but I’m not sure if
that’s correct because I obviously don’t know the external static
of the duct system. I would rather input the kW/cfm. Any advice?<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><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 style='mso-margin-top-alt:auto;margin-bottom:3.0pt;
margin-left:.5in'><b><i><font size=3 color="#333399" face="Times New Roman"><span
style='font-size:12.0pt;color:#333399;letter-spacing:1.2pt;font-weight:bold;
font-style:italic'>Brian Goldsmith</span></font></i></b><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><strong><b style='mso-ansi-font-weight:
normal;mso-bidi-font-weight:normal'><font size=1 color=green face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:green;letter-spacing:
1.0pt;font-weight:normal'><a href="mailto:Brian.Goldsmith@atce.com"
title="blocked::mailto:Brian.Goldsmith@atce.com">Brian.Goldsmith@atce.com</a></span></font></b></strong><span
class=MsoHyperlink><u><font color=blue><o:p></o:p></font></u></span></p>
<p class=MsoNormal style='margin-left:.5in'><strong><b style='mso-ansi-font-weight:
normal;mso-bidi-font-weight:normal'><font size=1 color=green face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:green;letter-spacing:
1.0pt;font-weight:normal'>direct</span></font></b></strong><font size=1
color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:"Gill Sans MT";
color:green;letter-spacing:1.0pt'> 408.487.1217<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><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>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='margin-left:.5in'><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'>
equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Jeremy Poling<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 06, 2011
8:47 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Carol Gardner; Paul Diglio<br>
<b><span style='font-weight:bold'>Cc:</span></b>
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] 90.1
Supply Fan Energy</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div id=idOWAReplyText99268>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Carol,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><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 style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Here's my general thoughts on OA in
the model, for what they're worth. The only problem with using the OA-per
keywords in eQuest is that they are not additive: you can only use
OA-flow-per-area or OA-flow-per-person but not both. Since ASHRAE 62.1-2004
and later prescriptively defines both per-person and per-area requirements in
an additive fashion, eQuest is incapable of self-calculating the amount of OA
required to comply with ASHRAE 62.1. I'm more often in the role of
peer-reviewing models for engineers before they go to the LEED review teams and
this is one thing I find myself too often receiving a response of "this
way should work." The reviewers will compare the OA amounts
specified in EQp1 and EQc2 to the amounts used in the model in EAc1 and will
more often than not kick out a comment if they do not match.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><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 style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>I usually try to minimize the time
for having to respond to comments, especially knowing how many comments
energy models receive. My recommendation to modelers using eQuest is to
always calculate your design CFM values (OA, supply, return, exhaust) outside
of the software using appropriate adjustment factors where necessary or allowed
by codes like ASHRAE 62.1 (elevation, etc.) and then use the direct
specification keywords for zone-level airflows in eQuest. As long as you
have elevation zero'd out you should be able to get eQuest to match the airflow
values you calculated, or else be able to easily identify where the problem is
(system sizing factor >1, etc.). An added benefit is that you do not
have to run the simulation and look at the results to know what CFM values you
have in the model: they are in the input file and can be accessed easily in the
summary tables in the user interface.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><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 style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>It would be great if eQuest was able
to match the ASHRAE 62.1 calcs and even provide an ASHRAE 62.1 summary report
(like some other modeling software can), but I know Hirsch's team was focused
on the baseline compliance engine and the soon-to-come Canadian version, so it
is more than fair to be patient waiting for that feature :) I also know
that some really advanced users have ways to use the customization features in
eQuest to do this already and I encourage them to share/teach...</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><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 style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>In short - the Outside-air-flow
keyword should be the preferred keyword and indeed eQuest overrides all other
OA keywords at the zone level if a value is present for Outside-air-flow.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><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 style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Separately, when you do calculate
CFM values for the model, don't forget that ASHRAE 90.1-2007 allows credit for
pressure drop due to filters ;) Just one more thing to have to worry
about in the model...</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
</div>
<div id=idSignature83948>
<div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><b><font size=1 color=black face=Verdana><span
style='font-size:7.5pt;font-family:Verdana;color:black;font-weight:bold'>Jeremy
R. Poling, PE, LEED AP+BDC</span></font></b><o:p></o:p></p>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><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'>
equest-users-bounces@lists.onebuilding.org on behalf of Carol Gardner<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wed 4/6/2011 7:03 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Paul Diglio<br>
<b><span style='font-weight:bold'>Cc:</span></b> equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] 90.1
Supply Fan Energy</span></font><o:p></o:p></p>
</div>
</div>
</div>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>The reason someone "thinks OA might cause a
problem" is because of the way that someone thinks it was entered. It
sounds like it was entered using outside-air-flow, and I may be wrong because
Michael hasn't really said. Using Outside-Air-Flow overrides any values eQUEST
might otherwise calculate, and I would suggest that might make a difference. If
OA Flow-Per was used instead, that's the one I use, it gives eQUEST the
flexibility to calculate the OA cfm itself. To my mind, that a good use of an
energy model that is not only interactive but uses 8760 hours of weather data. <br>
<br>
Any other thoughts on this?<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On Wed, Apr 6, 2011 at 4:07 PM, Paul Diglio <<a
href="mailto:paul.diglio@sbcglobal.net">paul.diglio@sbcglobal.net</a>>
wrote:<o:p></o:p></span></font></p>
<div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Michael:<br>
<br>
The kW/CFM you used seems reasonable.<br>
<br>
I don't know if you are using a CV or VAV system, but lets assume VAV.
90.1-2007 G3.1.2.9 shows the formula CFMs *.0013+A for baseline BHP. A is
calculated per Section 6.5.3.1.1. Using Table 6.5.3.1.1A VAV, we have the
formula BHP<= CFMs*0013+A. The footnote defines A=sum of
(PD*CFMd/4131). So assuming you have a fully ducted return, the PD is .5
which should be multiplied by (CFMd/4131). If there are various pressure
drops throughout the system we need to estimate the CFM flow at each pressure
drop.<br>
<br>
As an example, let's take a 20,000 CFM VAV system with 18,000 CFM of return air
through a ducted return.<br>
<br>
A = (.5*(18000/4131) = 2.178 <br>
<br>
BHP =20000*.0013+2.178 = 28.17<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'><br>
pFan= 28.17*.746/ Fan Motor Efficiency. Note that since we need kW not
watts per CFM the 746 becomes .746. That is probably the reason you
generated a large kW number. Per Table 10.8 a 30 HP baseline motor needs to be
91% efficient.<br>
<br>
The formula now becomes pFan =28.17*.746/.91 = 23.09 kW. Our kW per CFM
is .0011.<br>
<br>
If I am modeling a proposed project with a defined supply and return CFM, I
would expect that the baseline would be approximately the same. The
CFM/Ft2 required varies greatly between building and systems. In the real
world I see 1.2 or so CFM/Ft2 much, much more than I see .5 CFM/Ft2. Check your
CFM/Ton to see if you are in the ballpark.<br>
<br>
I don't know why someone would think that outside air would cause a
problem. Air is air. Too much outside air would raise energy costs
though.<br>
<br>
Paul Diglio<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
<hr size=1 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='margin-left:.5in'><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'> M.
Shields <<a href="mailto:mshields@fstrategies.com" target="_blank">mshields@fstrategies.com</a>><br>
<b><span style='font-weight:bold'>To:</span></b> Paul Diglio <<a
href="mailto:paul.diglio@sbcglobal.net" target="_blank">paul.diglio@sbcglobal.net</a>>;
Carol Gardner <<a href="mailto:cmg750@gmail.com" target="_blank">cmg750@gmail.com</a>>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'><br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>Sent:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Wed,
April 6, 2011 6:13:53 PM<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Equest-users] 90.1
Supply Fan Energy</span></font><o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 color="#1f497d" face="Times New Roman"><span
style='font-size:11.0pt;color:#1F497D'>I’ll try OA as a per person number
instead of a per space number and see what happens. kW/CFM varied by
space between ~ .0007 and .001, and when I look at the SV-A reports the Fan
Demand (kW) matches what I calculated using 90.1. </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 color="#1f497d" face="Times New Roman"><span
style='font-size:11.0pt;color:#1F497D'>I found G3.1.2.9 could possibly be
interpreted a couple different ways (for example the denominator include X BHP
instead of the whole fraction), but the only one which produced a reasonable
bhp for to me was </span></font><img border=0 width=242 height=25
id="_x0000_i1027" src="cid:image001.gif@01CBF514.646BAB80"><font size=2
color="#1f497d"><span style='font-size:11.0pt;color:#1F497D'>. I guess
this could have been where I messed up but all the other possibilities
generated kW numbers which didn’t make sense (quite large or negative).</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><b><font size=2 face="Times New Roman"><span
style='font-size:10.0pt;font-weight:bold'>From:</span></font></b><font size=2><span
style='font-size:10.0pt'> Paul Diglio [mailto:<a
href="mailto:paul.diglio@sbcglobal.net" target="_blank">paul.diglio@sbcglobal.net</a>]
<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 06, 2011
5:51 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Carol Gardner; M. Shields<br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] 90.1
Supply Fan Energy</span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>Michael:<br>
<br>
Just out of curiosity, what did you calculate for the kW/CFM?<br>
<br>
I have modeled buildings where the ventilation fans use much more energy than
the heating and cooling energy combined.<br>
<br>
Paul Diglio</span></font><o:p></o:p></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'><font
size=2 face="Times New Roman"><span style='font-size:10.0pt'>
<hr size=1 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;
margin-left:.5in'><b><font size=2 face="Times New Roman"><span
style='font-size:10.0pt;font-weight:bold'>From:</span></font></b><font size=2><span
style='font-size:10.0pt'> Carol Gardner <<a href="mailto:cmg750@gmail.com"
target="_blank">cmg750@gmail.com</a>><br>
<b><span style='font-weight:bold'>To:</span></b> M. Shields <<a
href="mailto:mshields@fstrategies.com" target="_blank">mshields@fstrategies.com</a>><br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Sent:</span></b> Wed, April 6, 2011 5:46:30
PM<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] 90.1
Supply Fan Energy<br>
</span></font><br>
Yes, that is correct and obviously there isn't a large number in there. The
default is 0.5 cfm/sf. I really think it's your outdoor air. Try changing it to
cfm/person.<o:p></o:p></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Wed, Apr 6, 2011 at 1:47 PM, M. Shields <<a
href="mailto:mshields@fstrategies.com" target="_blank">mshields@fstrategies.com</a>>
wrote:<o:p></o:p></span></font></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 color="#1f497d" face="Times New Roman"><span
style='font-size:11.0pt;color:#1F497D'>Do you mean under the
Systems->Fans->Flow Parameters Min Flow cfm/ft2? I left this blank
thinking that equest would then size the flow rate based on my design
parameters for supply air temp and zone temp as Appendix G requires, is that
incorrect?</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><b><font size=2 face="Times New Roman"><span
style='font-size:10.0pt;font-weight:bold'>From:</span></font></b><font size=2><span
style='font-size:10.0pt'> Carol Gardner [mailto:<a
href="mailto:cmg750@gmail.com" target="_blank">cmg750@gmail.com</a>] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 06, 2011
4:04 PM</span></font><o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<b><span style='font-weight:bold'>To:</span></b> M. Shields<br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] 90.1 Supply
Fan Energy<o:p></o:p></span></font></p>
</div>
</div>
</div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Under the HVAC systems tab, go to the Air Flow screen and look for the
field labeled cfm/sf. It usually defaults to 0.5 cfm/sf, something I've been
going on about a bit lately on this listserv. A better number is 1 or so,
usually but it depends on building type, exposure, etc. For you, make sure it
is not too large. I suspect, however, that this is not where your problem is. I
suspect you have accidentally entered too much OA. I suggest you go back and
simply put in the Standard 62 cfm/person rate and call it good. I have never
specified it as a cfm rate but that sounds like not such a good idea for energy
modeling. See if that helps.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Wed, Apr 6, 2011 at 12:57 PM, M. Shields <<a
href="mailto:mshields@fstrategies.com" target="_blank">mshields@fstrategies.com</a>>
wrote:<o:p></o:p></span></font></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 color="#1f497d" face="Times New Roman"><span
style='font-size:11.0pt;color:#1F497D'>I looked at the ACH based on the SV-A
system CFM and the volume of the zone and it does seem high (2-5 ACH), but I
let equest calculate the system CFM for me.</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 color="#1f497d" face="Times New Roman"><span
style='font-size:11.0pt;color:#1F497D'>I have one system per zone so I
specified OA in the zone tab as a overall CFM rate based on the 62.1
calculations I did.</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><b><font size=2 face="Times New Roman"><span
style='font-size:10.0pt;font-weight:bold'>From:</span></font></b><font size=2><span
style='font-size:10.0pt'> Carol Gardner [mailto:<a
href="mailto:cmg750@gmail.com" target="_blank">cmg750@gmail.com</a>] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 06, 2011 3:37
PM<br>
<b><span style='font-weight:bold'>To:</span></b> M. Shields<br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] 90.1
Supply Fan Energy</span></font><o:p></o:p></p>
</div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Check your cfm/sf number in your systems, that would definitely cause
this if it's set too high. Also what field are you using for your OA
ventilaton? <br>
<br>
Carol<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Wed, Apr 6, 2011 at 12:22 PM, M. Shields <<a
href="mailto:mshields@fstrategies.com" target="_blank">mshields@fstrategies.com</a>>
wrote:<o:p></o:p></span></font></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi all,<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>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='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>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='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>____________________________<br>
Michael Shields<br>
Facility Strategies Group, LLC</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><st1:Street st="on"><st1:address st="on"><font size=2
face="Times New Roman"><span style='font-size:10.0pt'>1012 Market Street,
Suite 307</span></font></st1:address></st1:Street><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><st1:place st="on"><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Fort Mill, SC </span></font><st1:PostalCode st="on"><font
size=2><span style='font-size:10.0pt'>29708</span></font></st1:PostalCode></st1:place><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>Phone: <a href="" target="_blank" value="+18034934507">803-493-4507</a></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>Fax: <a href="" target="_blank" value="+18035482511">803-548-2511</a><br>
Email: <a href="mailto:mshields@fstrategies.com" target="_blank">mshields@fstrategies.com</a></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
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margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
_______________________________________________<br>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
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<br clear=all>
<br>
-- <br>
Carol Gardner PE<o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
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<br clear=all>
<br>
-- <br>
Carol Gardner PE<o:p></o:p></span></font></p>
</div>
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