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Matthias,<br>
I think the answer would depend a lot on the complexity of the
HVAC systems and on the level of detail to which you would need to
model them. The most comprehensive building models that I have done
are for LEED projects (proposed building, proposed mechanical
system, baseline (comparison) building, baseline (comparison) HVAC
system, and lots of report writing). These projects can range from
70 to 200 hours of time with most coming in around 100 to 150.
Again, though, that is modeling two buildings. To model just the one
proposed building, I think you would probably be in the range of 50
to 150 hours.<br>
<br>
Some other thoughts for you, though (which I realize you didn't
request... ;-) ). Every model, every building simulation tool that
is out there is some simplification of a real process. The more
assumptions the model developer builds into the model, the simpler
the model is to implement but the less flexible it becomes. The
fewer assumptions that the developer builds in, the more flexible
the tool but the more complexity there is involved with implementing
a system model. I have found it helpful to think of building energy
modeling tools on a sliding scale where on one end are tools that
are relatively quick to use, which have a LOT of built-in
assumptions and which are therefore not very flexible. One the other
end are tools that are very flexible in terms of what you can model
but which are more time consuming to use. TRNSYS is definitely on
the "flexible but complex" end of that scale - intentionally so. If
you are trying to model a building that has some unusual features
(radiant floors, natural ventilation, double skin facades, complex
HVAC systems, etc.) in it then TRNSYS is a good tool to use, even
though it will require more hours to implement the model. If the
building has nothing but conventional envelope and systems then
there is no advantage to TRNSYS (or other tools like it); you will
spend an unnecessarily long time implementing the model. On the
other hand, it may be quick to implement a model in another software
but if the building has features that cannot be modeled by the other
software, you need to change to another, more comprehensive or
flexible tool.<br>
<br>
Best,<br>
David<br>
<br>
<div class="moz-cite-prefix"><br>
<br>
<br>
On 12/12/2012 09:30, Matthias Maier wrote:<br>
</div>
<blockquote
cite="mid:CAAoqN5ZUEzTQP-U9zihTAzphmSr9Y=kqxyeQOrm-_GkgP9ki=Q@mail.gmail.com"
type="cite">Hi TRNSYS-users,<br>
<br>
<div>I am studying electrical engineering at the Technical
University of Munich and currently I am writing my bachelor´s
thesis at the Institute for Energy Economy and Application
Technology. My subject is the comparison and assessment of
various building simulation programs. Background of this thesis
is the development of an automatized demand side management for
commercial buildings, in case of the emergence of a dynamic
electricity tariff in Germany. Therefor a whole thermal
simulation of the building and it´s HVAC systems would be
necessary.<br>
</div>
<br>
One of my tasks is to estimate the costs for the implementation of
a building including its HVAC systems. For this reason I selected
an example building to estimate the costs for (added in the
attachment). Support referred me to this user service. I would be
very grateful if anyone could tell me how long it takes to
implement this example building including its HVAC to TRNSYS and
perform a high-resolution simulation (minute-basis) for a
eperienced user.
<div>
<br>
</div>
<div>Thank you for your attention.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Matthias Maier</div>
<br>
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<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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