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The part of the wall that has the window needs to be defined as an
EXTERNAL wall. The part of the wall that has the solar collectors on it
is a BOUNDARY wall. As for the solar collectors themselves, there
aren't any such models in the standard library. The model to which I
was referring is Type563, a building integrated PVT (photovoltaics and
thermal) collector. You'll need to review the mathematical description
carefully in order to do it correctly but if you set the parameters so
that the PV efficiency is 0, the device is simply a thermal building
integrated collector that calculates the back-side surface temperature
that needs to be passed to the BOUNDARY wall.<br>
Kind regards,<br>
David<br>
<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:a8304506@graduate.hku.hk">a8304506@graduate.hku.hk</a> wrote:
<blockquote cite="mid:1234946977.499bcba1732e1@imp3.webmail.hku.hk"
type="cite">
<pre wrap="">Hello, David.
Thank you for your reply, but I find two problems. The first one is that for a
BOUNDARY wall, no window can be added. The second one is that I can't find any
suitable proformas for the solar collectors which have the input and output
variables as mentioned. Do you have other suggestions?
Best Regards
LEE, Chun Kwong
Research assistant
Division of Building Science and Technology
City University of Hong Kong
Quoting David Bradley <a class="moz-txt-link-rfc2396E" href="mailto:bradley@tess-inc.com"><bradley@tess-inc.com></a>:
</pre>
<blockquote type="cite">
<pre wrap="">Chun Kwong,
If you have solar collectors that are truly integrated with the facade
of your building then you will need to define the building wall on which
the collectors are mounted as a BOUNDARY wall with a user defined
outside surface temperature and you will need to define a Type56 output
for either the inside surface temperature or for the energy transfered
out through the outside surface of that wall (QCOMO); which output you
need depends on your collector model. You then need a collector model
that takes either the energy conducted through its back side or the
inside surface temp of the wall and which calculates the temperature of
the interface between the wall and the collector. I believe that there
are some models like that in the TESS Green Building Library.
Kind regards,
david
<a class="moz-txt-link-abbreviated" href="mailto:a8304506@graduate.hku.hk">a8304506@graduate.hku.hk</a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hello, Trnsys users.
I want to simulate a solar cooling system with the solar collectors mounted
</pre>
</blockquote>
<pre wrap="">on
</pre>
<blockquote type="cite">
<pre wrap="">the external wall of a building. I suppose that I add an active layer on
</pre>
</blockquote>
<pre wrap="">the
</pre>
<blockquote type="cite">
<pre wrap="">external of the wall with an input equivalent heat transfer coefficient for
</pre>
</blockquote>
<pre wrap="">the
</pre>
<blockquote type="cite">
<pre wrap="">solar collectors. However, I don't konw how I can output that value from
</pre>
</blockquote>
<pre wrap="">the
</pre>
<blockquote type="cite">
<pre wrap="">solar collector models (say Type71, Type73). Can anyone advise how I can
</pre>
</blockquote>
<pre wrap="">make
</pre>
<blockquote type="cite">
<pre wrap="">it? Thank you!
Best Regards
LEE, Chun Kwong
Research assistant
Division of Building Science and Technology
City University of Hong Kong
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***********************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY 22 N. Carroll Street - Suite 370
Partner Madison, WI 53703
USA
P: +1.608.274.2577
F: +1.608.278.1475
E-mail: <a class="moz-txt-link-abbreviated" href="mailto:bradley@tess-inc.com">bradley@tess-inc.com</a>
Web Pages: <a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a> and <a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a>
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