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<p>Nick,</p>
<p>I'm glad that Erik took the first shot in answering your
question, as I was leery to say too much because I haven't
followed the development of DOE-2.2 much at all and might be
giving you outdated impressions from DOE-2.1E. However, your
question seems to ask a generic question of why the design
capacities in the verification reports (SV-A, PV-A, etc.) differ
from the peak loads in the simulation reports (SS-H, PS-H,
etc.). Design capacities are either input by the user or
calculated using design day conditions which are worse-case
conditions, i.e., weather conditions at the 0.4% criteria and the
building at full operations for all zones (this is for cooling;
for heating the building is assumed to be completely off except
for the HVAC). I apologize if that's all well known, in which
case take this as an extended hello prior to meeting in KC!<br>
</p>
<p>Joe<br>
</p>
<div class="moz-cite-prefix">On 6/13/2019 11:08 AM, Erik Kolderup
via Equest-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOKega6jwZMqku_XUuBEwDXB3Nv9XF2uFG6N2HNaBhnRdbt_Ow@mail.gmail.com">
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<div class="gmail_default" style="font-size:small">Hi, Nick. </div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I think that
the capacity of the cooling loop will be based on the sum of
the capacities of cooling coils connected to the loop,
assuming the sizing option for the loop is "secondary" rather
than "primary". If you look at the SV-A report and sum up
capacity of all the cooling coils, does that get you to 13
MBtu/hr? If you want the loop sized based on chiller size,
then the sizing option for the loop should be "primary". </div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">-Erik</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr"><b>Erik Kolderup, PE, LEED AP</b>
<div><a href="mailto:erik@kolderupconsulting.com"
target="_blank" moz-do-not-send="true">erik@kolderupconsulting.com</a><span
style="color:rgb(153,153,153)"> | 415.531.5198 | </span><a
href="http://www.kolderupconsulting.com"
target="_blank" moz-do-not-send="true">www.kolderupconsulting.com</a><span
style="color:rgb(153,153,153)"> </span><br>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Jun 13, 2019 at 11:02
AM Nicholas Caton via Equest-users <<a
href="mailto:equest-users@lists.onebuilding.org"
moz-do-not-send="true">equest-users@lists.onebuilding.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div class="gmail-m_-3304755082402223738WordSection1">
<p class="MsoNormal">Hi everyone,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Can anyone help me assert or correct
my understanding on something? This is from a model
built in v3.65, b7175, doe2.2 engine (with intent to
upconvert the project to doe2.3 before I’m done).</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Report PV-A lists the capacity for
each heating/cooling loop. Here I’m cropping to just
the loops, and highlighting what I’m used to thinking of
as the “peak” coincident capacity requirement for a
chilled water loop – 13.909 MMBtu/hr (that’s millions):</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="margin-left:0.5in"><img
style="width: 9.6354in; height: 4in;"
id="gmail-m_-3304755082402223738Picture_x0020_3"
src="cid:part4.35AF194A.1BCB6933@whiteboxtechnologies.com"
class="" width="925" height="384"></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">The following reports PS-H go into
more detail on each item listed in PV-A. Here is the
report for the same “Chilled Water Loop,” with a coule
more highlights:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="margin-left:0.5in"><img
style="width: 8.802in; height: 9.3541in;"
id="gmail-m_-3304755082402223738Picture_x0020_7"
src="cid:part5.BD1B342E.B7DF68B7@whiteboxtechnologies.com"
class="" width="845" height="898"></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Immediately, I note that <b><span
style="color:red">13.909 MMBtu/hr</span></b><span
style="color:red"> (1,159 tons)
</span>aligns with PV-A, however I do not see that
number matching (intuitively) any of the other figures
or sums provided on this sheet. The figure
<span style="background:yellow">5,625.126 kBtu/hr (469
tons)</span> aligns with my expectations for peak load
on the loop, where nominal capacity of the associated
chillers on this loop are in the same ballpark (one is
444 tons and one is 210 tons on paper & @ design
conditions, and I’m told they commonly do not need to
engage the smaller chiller during the dead of summer).</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Can anyone help me reconcile the
differences between what’s reported as “Cooling
Capacity” in PV-A, in relation to the annual peak loads
indicated for the same loop in the PS-H report?
</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks!</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">~Nick</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span
style="font-family:Arial,sans-serif;color:rgb(58,122,70)"><img
style="width: 7.5625in; height: 0.0937in;"
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alt="cid:image005.png@01D515A3.47EDD880" class=""
width="726" height="9"></span></p>
<p class="MsoNormal"><b><span
style="font-family:Arial,sans-serif;color:rgb(58,122,70)">Nick
Caton, P.E., BEMP</span></b><span
style="color:rgb(58,122,70)"></span></p>
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