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Santeri,<br>
I would recommend that you run the plugin for Type194 (click on
the magic wand icon in the lower left corner of the parameters tab
of the proforma). The plugin will take the parameters that you can
get from the PV panel manufacturer and will give you back the
various values that the Type requires. I would not recommend
changing those parameters (a, IL, IO, series resistance, etc.)
arbitrarily.<br>
<br>
I would also recommend that you run the PV without the inverter in
order to make sure there isn't a mismatch between the two.<br>
Kind regards,<br>
David<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 9/4/2012 09:48, Santeri Siren wrote:<br>
</div>
<blockquote
cite="mid:CAF-s-bKkVnb9g7KKs1qHqY6-+OQy_vWDuZAi2MEGPVwn7S+nQQ@mail.gmail.com"
type="cite">Dear Trnsys users,<br>
<br>
I am simulating a PV system in Finlands conditions using component
194b. My problem is that system efficiencies are pretty low
(7...8% at summer time). <font><span style="font-size:10pt">By
efficiency I mean produced power at
maximum power point divided by the total radiation of the sun
[W/m2/W/m2]. <br>
<br>
I can affect the efficiency by growing parameter number 20
(IL). If I grow this parameter, my efficiency also grows. I
checked the matematical reference, and it says that IL =
photocurrent. <font><span style="font-size:10pt">However I
have no Idea what kind of values should I give to this
parameter. Does anyone know that should I chande the
default value of this parameter to something else?<br>
<br>
</span></font></span></font><br>
<font><span style="font-size:10pt">Here are the products I used
for parameters:<br>
<br>
PV panels: <a moz-do-not-send="true"
href="https://mail.aalto.fi/owa/redir.aspx?C=8LHY1PC5HU2JpAvOUvOogdFHYkwoXs8ImeeuOqFfiahYYb-xE77mmUM_w1LaswdMN3VtECxKbS8.&URL=http%3a%2f%2fam.suntech-power.com%2fimages%2fstories%2fpdf%2fdatasheets%2fjun2012%2fSTP240_Wde_Poly_35mmFrame.pdf"
target="_blank">
http://am.suntech-power.com/images/stories/pdf/datasheets/jun2012/STP240_Wde_Poly_35mmFrame.pdf</a><br>
<br>
Inverter (sunnyboy 5000TL): <a moz-do-not-send="true"
href="https://mail.aalto.fi/owa/redir.aspx?C=8LHY1PC5HU2JpAvOUvOogdFHYkwoXs8ImeeuOqFfiahYYb-xE77mmUM_w1LaswdMN3VtECxKbS8.&URL=http%3a%2f%2fwww.sma-uk.com%2fen_UK%2fproducts%2fsolar-inverters%2fsunny-boy%2fsunny-boy-3000tl-3600tl-4000tl-5000tl.html"
target="_blank">
http://www.sma-uk.com/en_UK/products/solar-inverters/sunny-boy/sunny-boy-3000tl-3600tl-4000tl-5000tl.html</a><br>
<br>
<br>
Best regards,<br>
<br>
Santeri Siren<br>
</span></font>
<br>
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<br>
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<br>
<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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