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Nope, not that I know of. Before this kind of summaries is
implemented in EPlus, I think scripting is the way to get faster
results. SQLite is really a powerful result analysis tool. What you
describe below can be implemented relatively easily with some SQL
statements.<br>
<br>
We have been trying to come up with a better way to communicate this
kind of output to the client. I will share the results to this list
once we finalize how to do this in EPlus.<br>
<br>
Thanks,<br>
<br>
Ery<br>
<br>
On 03/04/2011 05:04 PM, Karen Walkerman wrote:
<blockquote
cite="mid:AANLkTinEzWe+sayhTDQHj5Vn80wB768JC2m6icLCO4Yy@mail.gmail.com"
type="cite">
<div>Thanks Ery.<br>
</div>
<div><br>
</div>
<div>It helps. It's just slow. What I love about LS-C is that
it's fast. Do you know of a way to get a grouped report for all
walls within a particular zone. So instead of having hourly
output for every wall in a space, you would have one for each:
exterior walls, interior walls, etc? This would make reviewing
these outputs much faster!</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Karen</div>
<br>
<div class="gmail_quote">On Fri, Mar 4, 2011 at 6:52 PM, Ery
Djunaedy <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ery.mailinglist@gmail.com">ery.mailinglist@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">
<div>Hi Karen,</div>
<div> </div>
<div>Same here, I always use LS-C when I use eQuest. Just
adding the ventilaton load, then you will have the peak
load. Its always fun to compare this number with what the
mechanical engineer has.</div>
<div> </div>
<div>I said earlier, in EnergyPlus it is not nicely formated
like LS-C. It does not mean you cannot have it. You can
force EPlus to show the numbers. The internal gains are
the easy ones, the windows are also relatively easy, the
last pieces are the opaque "conduction" and the
ventilation load. Which is not difficult.<br>
<br>
The problem is what peak to report? You will have the peak
of the total gains, which will happen at a different
timestep then the peak of the cooling load. And these two,
in turn is different with the zone sizing report.<br>
<br>
I personally use the zone sizing reports as the peak
loads, and I will get all the details by running the
designday run with schedules consistent with the design
day schedule.<br>
<br>
Hope this helps,<br>
<font color="#888888"> <br>
Ery<br>
<br>
</font></div>
<div>
<div class="h5">
<div class="gmail_quote">On Fri, Mar 4, 2011 at 12:00
PM, Karen Walkerman <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:kwalkerman@gmail.com" target="_blank">kwalkerman@gmail.com</a>></span>
wrote:<br>
<blockquote style="border-left: 1px solid rgb(204,
204, 204); margin: 0px 0px 0px 0.8ex; padding-left:
1ex;" class="gmail_quote">
<div>Hi Ery,<br>
</div>
<div><br>
</div>
<div>Thanks for this explanation. I have been
struggling with this topic as well as I do more
modeling in Energy Plus. However, there is one
thing that you did not address above. While
DOE2's LS-C report may not match exactly to what
systems are seeing as far as loads, it does give
an easily readable report which allows you to
check your inputs. I review it quite often as a
quality control check for my models. It also
allows me to target energy saving measures, and
helps me explain to clients why certain changes
might make sense for their building. For example,
one client might be interested in increasing roof
insulation, but if they have a multi-story
building with a relatively small roof, and lots of
wall area, it makes more sense for them to reduce
thermal bridging in their wall construction.
Having a model-generated report makes this
process much faster for me.</div>
<div><br>
</div>
<div>Do you have any suggestions with regards to
Energy Plus of ways to achieve the above goals
with the currently available reports?</div>
<div><br>
</div>
<div>Thanks.</div>
<div><br>
</div>
<div>--</div>
<div>Karen</div>
<font color="#888888"><br>
</font>
<div class="gmail_quote">
<div>
<div>On Fri, Mar 4, 2011 at 12:26 PM, Ery
Djunaedy <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:ery.mailinglist@gmail.com"
target="_blank">ery.mailinglist@gmail.com</a>></span>
wrote:<br>
</div>
</div>
<blockquote style="border-left: 1px solid rgb(204,
204, 204); margin: 0px 0px 0px 0.8ex;
padding-left: 1ex;" class="gmail_quote">
<div>
<div>
<div text="#000000" bgcolor="#ffffff">Sandeep,<br>
<br>
This is what I call a legacy topic from
the DOE2 era. You better search the posts
in EnergyPlus support mailing list. Search
for "cooling load component", and you will
find an interesting discussion.<br>
<br>
In summary, you will not find a cooling
load component report in EnergyPlus nicely
formatted a-la LS-C report in eQuest/DOE2.<br>
<br>
If you try to match the total gains v.s.
the cooling load for every time step, then
you will be in for a long ride. Take the
solar radiation gain, for example. The
GAIN for a particular time step is not
necessarily converted into cooling LOAD at
the next time step. If your building is
thermally massive, then the delay plays an
important role and it could be hours
before the solar radiation GAIN becomes an
actual LOAD as seen by the thermostat. Do
not forget about this, if you try to match
the cooling load report with the total
gains.<br>
<br>
If you are talking about peak cooling
load, then you will need to focus on the
zone sizing report. Calculating the gains
component is easy because the schedule is
always 100% on. You just need to quantify
the ventilation load.<br>
<br>
Please note that the report suggested by
Paul below is the convection report. I
imagine that you would expect a conduction
report? EnergyPlus zones technically
cannot see conduction through opaque
surfaces, in the sense of A*U*DeltaT. They
can only see convection and radiation. In
fact, if you try to match A*U*DeltaT for
external wall with this report (Surface
Int Convection Heat Rate) then you will
have a hard time explaining. If you keep
this in mind, the differences can be
easily explained.<br>
<br>
Cheeers,<br>
<font color="#888888"><br>
Ery</font>
<div><br>
<br>
On 03/04/2011 07:07 AM, Paul Raftery
wrote:
<blockquote type="cite">
<div>Hi Sandeep,</div>
<div><br>
</div>
<div>A full list of the available
output variables are given in the
.rdd file (it is one of the files
output from the simulation). Simply
copy the relevant line from that
file into your .idf (or .imf) file,
rerun the simulation, and the new
variable(s) will be output to the
.csv and .eso files.</div>
<div><br>
</div>
<div>e.g. Adding this line to the
input file will give you the
convective heat gain from all
interior surfaces in your model.</div>
<div>Output:Variable,*,Surface Int
Convection Heat Rate,hourly; !- Zone
Average [W]</div>
<div><br>
</div>
<div>Regards,</div>
<div>Paul</div>
<br>
<div class="gmail_quote">On 4 March
2011 13:50, Sandeep Kachhawa <span
dir="ltr"><<a
moz-do-not-send="true"
href="mailto:sandeep.kachhawa@gmail.com"
target="_blank">sandeep.kachhawa@gmail.com</a>></span>
wrote:<br>
<blockquote style="border-left: 1px
solid rgb(204, 204, 204); margin:
0pt 0pt 0pt 0.8ex; padding-left:
1ex;" class="gmail_quote">
<div>Dear All</div>
<div> </div>
<div>Can we get the individual
break-up of cooling load in <b>EnergyPlus</b>?
Internal loads (People,
Equipment & Lighting),
Infiltration loads and Window
gains are available but the <b>gians
from Walls and Roof is
missing. </b>Surely EnergyPlus
does calculate all the above
loads to size the Cooling
Equipment but there is no such
specific output.</div>
<div> </div>
<div>Regards</div>
<div>Sandeep Kachhawa</div>
<br>
</blockquote>
</div>
</blockquote>
<br>
</div>
</div>
<br>
</div>
</div>
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