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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Appeasing the GBCI reviewers is always about proper
documentation. They shouldn’t have to go thru every zone/system in your
.inp file to make sure there is a corresponding system. Hell, it’s hard
enough for us to do that (without being able to open up eQuest).<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'>Comment #1: Plain and simply state: The baseline building has
been configured so that each thermal zone has a corresponding system, and the
thermal zones for the baseline building match the proposed building. (and you
just need to make sure this is the case – if you have an unconditioned
zone attached to a system, you might want to say that the unconditioned zone
has no impact on the system, but eQuest requires each zone to have an
associated system and thus you have to have it share a system with a
conditioned zone).<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'>Comment #2: Like Chris said, make a spreadsheet, and use it for
every project. The small amount of time it takes to program excel to determine
if the CFM is > or < than 20,000 CFM and automatically use the correct
formula will pay for itself quickly.<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'>Comment #3: Plain and simply state: eQuest’s autosize
routine is based on the 20 degree delta T that we have entered for each system
(show a screenshot of that eQuest tab to help back this up, and circle in
red). Therefore, although it is autosized, the CFM is correctly configured
based on this 20 degree delta T, and thus specific entry of CFM quantities in
the system tabs is not required.<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><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif";
color:teal'>GHT Limited<br>
</span></b><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'><ns0:PersonName><span
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style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>, PE,
LEED AP<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
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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
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Chris Jones<br>
<b>Sent:</b> Thursday, April 01, 2010 12:28 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] LEED Comments for EAC1 - Optimize Energy Performance<o:p></o:p></span></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The first comment seems like the reviewer isn't carefully
reviewing the submission. It is fairly simple to check the proposed sim
file and the Budget case sim file to see if each zone in the proposed case is
modelled as a single zone system in the Budget case. I have seen this
comment before and I am not sure what additional documentation the review might
want to make it "clearer".<br>
<br>
Comment 2: I always setup a spreadsheet showing my calculation of total fan
power for the proposed case and the Budget case. <br>
<br>
Comment 3: The 20°F differential is the difference between the room set point
and the supply air temperature. Re Autosizing supply air flows: I always
autosize the Baseline air flows based on the 20°F supply air to room air
temperature difference (G3.1.2.8). I set the heat sizing ratio to 1.25
and the cool sizing ratio to 1.15 as per G3.1.2.2. Never had a problem
with this approach. I suppose you could do a sizing run with those sizing
ratios then explicitly enter the resulting supply air flows, heating and
cooling capacities but it would amount to almost the same results. <br>
<br>
At 02:56 AM 4/1/2010, Ashraf Khan wrote:<o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt'>Hello,<br>
<br>
I received some comments from USGBC regarding my project initial review, in
Credit EAC1 – Optimize Energy Performance. Please advise me how I can
solve below mentioned comments in the review submission,<br>
<o:p></o:p></span></p>
<ol start=1 type=1>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l2 level1 lfo1'><span style='font-size:10.0pt'>It is unclear
whether one Baseline Constant Volume system was modeled per thermal zone
in the Baseline Case as required. Please verify that one system was
modeled per zone, and that the Baseline System efficiency for each zone
was modeled consistently with the capacity for the Baseline System serving
that zone. <i>(please guide me how to solve this comment)</i></span> <o:p></o:p></li>
</ol>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
<ol start=1 type=1>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l0 level1 lfo2'><span style='font-size:10.0pt'>Section G3.1.2.9 describes
calculation used to determine the fan power in the baseline building.
Please list the total fan volume, capacities, and fan power for the
Baseline and Proposed system. <i>(As my system doesn’t have any
Return fan, so i am dividing the ASHRAE total Fan power by 70% supply, 20%
return, 10% exhaust based on my understanding. Please guide me if any
changes required)</i></span> <o:p></o:p></li>
</ol>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
<ol start=1 type=1>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l1 level1 lfo3'><span style='font-size:10.0pt'>Based on
supporting document, supply fan volumes of some of the zones in the
baseline design appear to be modeled as “AUTOSIZED”. For the
baseline design the fan supply volumes should be calculated based on the
system capacity and a temperature differential of 20°F, as set forth in
Section G3.1.2.8.<i>(Please guide me Where can we enter the temperature
diff, is in Cooling Coil or any other ways.)</i> <o:p></o:p></span></li>
</ol>
<p class=MsoNormal><span style='font-size:10.0pt'> <br>
Thanks & Regards,<br>
Khan<br>
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<p style='margin-bottom:12.0pt'><br>
Chris Jones<br>
14 Oneida Avenue<br>
Toronto, ON M5J 2E3.<br>
Tel. 416-203-7465<br>
Fax. 416-946-1005<o:p></o:p></p>
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