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<span style="color:#1F497D" lang="EN-US">Benjamin,<br>
It is not really possible to explain what is going on without
seeing the project. Please send the *.tpf file as well as any
other files that are needed in order to run the project. Please
include a clear indication of specific times during the simulation
at which you see the behavior occurring. Please send the files
directly to me and please do not copy them to the entire mailing
list.<br>
regards,<br>
David<br>
<br>
</span><br>
<div class="moz-cite-prefix">On 09/07/2015 00:53, Benjamin Stobbe
wrote:<br>
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<p class="MsoNormal"><span lang="EN-US">Hey everybody,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’m designing my own
hybrid pv system, but the thermal side of the story I come
across some problems<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I had a question yeah I
want to understand the total model sorry for the many
questions. I was looking into component type563 to usefull
gain and it is a bit strange because it looks like you need
a minimum PV power to get some energy gain. Because below
990 kj/hr there is no usefull gain and then suddenly above
this 990 kj/hr you have 4560 kj/hr. My panel is 4 by 5 but
how can you explain this. Another thing in the summer there
is no direct sunlight on the panels because it are facades
and the sun in Hong Kong is high in the summer. According to
the model there is then also no PV power, but there is still
diffuse radiance on the panel and this will heat the panel
also up so why no PV Power. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">I
decided to look also into other components so I choose the
Type50b and compared the output with type563 but they give
different outputs I assured the size of the panels is the
same but the output of 50b is much higher than of typ563 in
type50b you can choose more parameters then in type563 but I
al kept them standard. Also when I try to calculate the
efficiency it does not make sence<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">I
looked into the working of controller 2b with their dead
bands and looked up the working in the mathematical
reference but I checked with logged data and the controller
is not working like the formulas make you expect to do. The
controller goes for example already on even the difference
is lower than the upper band length or goes off when the
temperature difference is still bigger than 2 and this
should not be happening according to the calculations<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">I
hope to hear from you soon. Thanks in advance.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Best
regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Benjamin
Stobbe<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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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>
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