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I agree with Marcus here. The best that you could do in IES -
practically - would be to utilise a polynomial representing the
performance of the collector. Definitely no detailed analysis of the
collector itself. The same would be true of E+.<br>
<br>
Sounds like you could end up messing around in Trnsys or Matlab -
not something I'd like to do!<br>
<br>
You may want to take a look at Micheal Wetter's work with Modelica
at LBNL. I don't think he's developed any solar collector models but
Modelica is definitely the way to go for general purpose physics
based component modelling. <br>
<br>
Again, it's worth keeping an eye on the development of IDA ICE from
Equa which has the best of both worlds: a friendly user interface
for generating building models and an open interface to the
underlying component models (many of which are written in Modelica).
There's a schematic modelling interface enabling the user to build
stand alone component models as well.<br>
<br>
Thanks for the bibliography reference Marcus.<br>
<br>
Regards<br>
<br>
Chris<br>
<br>
On 28/02/2011 08:33, Marcus wrote:
<blockquote
cite="mid:AANLkTinX91cjnOq2n1Z7oYzSyBFYqKWkCvC745M18u0n@mail.gmail.com"
type="cite">As Lars pointed out, if you are indeed investigating a
concentrating collector (with a reflector), then the problem is
probably more complex than modelling a flat plate collector due to
the importance of radiative transfer. It looks like CoDePro only
models flat plate collectors, but I've never used it. There might
be other tools out there, but if the design is truly custom, you
might need to develop your own computer model in something like
EES (which is exactly what CoDePro is) or Matlab, etc. <br>
<br>
Regardless, the most complete reference for solar collector
modelling is the book "Solar Engineering of Thermal Processes" by
Duffie and Beckman. <br>
<br>
Cheers,<br>
<br>
Marcus<br>
-- <br>
Marcus Jones, LEED AP, M.Sc. <br>
<i>Freelance energy consultant</i><br>
<i>Vienna, Austria</i><br>
<br>
<div class="gmail_quote">On Sun, Feb 27, 2011 at 4:35 PM, Lars O.
Grobe <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:grobe@gmx.net">grobe@gmx.net</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;">Hi!
<div class="im"><br>
<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
For component level modeling challenges like constructing
custom<br>
solar thermal collectors, what sort of simulation tools
would others<br>
recommend to evaluate, i.e. heat transfer through
different types of<br>
enclosure materials into the receiving fluid, or different
reflector<br>
shapes?<br>
</blockquote>
<br>
</div>
Hm, I am curious about replies here. Wouldn't it make sense to
break up the problem? Reflector design mostly would be about
radiative transfer, so optical simulation tools would lead to
an assessment of the irradiance on your absorbing surfaces.
The second step would be to find the heat flow inside the
piping as well as between pipes and surrounding.<br>
<br>
Cheers, Lars.<br>
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<div class="moz-signature">-- <br>
<div>
<p>Chris Yates <span style="color: rgb(79, 98, 40);">C Eng
MCIBSE</span></p>
<p><i style="">Building Physics Consultant<o:p></o:p></i></p>
<p>Tel:<span style=""> </span>+447960731576</p>
<p>Email: <a class="moz-txt-link-abbreviated" href="mailto:chris.malcolm.yates@gmail.com">chris.malcolm.yates@gmail.com</a></p>
<p>Skype: <span class="SpellE">christopher.m.yates</span></p>
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