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<font face="Verdana" size="2">Guangzhao,<br>
Those PF parameters proved difficult to solve but here are the
recommended values that you can use for the Type194 parameters.<br>
</font><br>
R_sh_ref=34.64 [ohm]<br>
a_ref=0.451 [V]<br>
I_L_ref=7.63 [A]<br>
I_o_ref=1.444E-20 [A]<br>
R_s_ref=0.346 [ohm]<br>
<br>
Kind regards,<br>
David<br>
<br>
<br>
On 3/14/2011 16:02, David BRADLEY wrote:
<blockquote cite="mid:4D7E8252.3090108@tess-inc.com" type="cite">
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<font face="Verdana" size="2">Guangzhao<br>
</font>My apologies for the delay, I am still working on
trying to get the parameters for your PV module generated. While
Type194 is the preferred model, you could use Type94 for the time
being. <br>
<br>
As for the mode parameter in Type194, you don't need to worry
about it. For a time, we were adding an extra "mode" parameter to
all new Types that we wrote just in case we needed it in the
future so that we wouldn't run into backwards compatibility
problems. Type194 only has one mode.<br>
<br>
Lastly, the voltage of your PV array and the voltage of your
battery bank typically need to match each other. A battery charge
controller can handle some differences but the idea is usually
that you want your DC PV array to run at a voltage that is a bit
higher than the battery bank voltage so that it can be used to
charge the batteries without a step-down voltage converter. The
number of cells within a PV module obviously can't be changed.
However, the number of modules that you connect in series and
parallel can be. Your PV array will run at multiples of about
17.5V, which is about normal for charging a 12V battery system I
would think. If you have PVs in series, you would need to also
have batteries in series as well.<br>
Kind regards,<br>
David<br>
<br>
On 3/14/2011 08:21, lvguangzhao wrote:
<blockquote cite="mid:201103142121060207523@126.com" type="cite">
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<div><font color="#000080" face="Verdana" size="2">
<div><font color="#000080" face="Verdana" size="2">
<div><font color="#000080" face="Verdana" size="2">Hello,David,I
urgently want to get your help.</font></div>
<div><font color="#000080">Following are the parameters
I missed. </font></div>
<div><font color="#000080">Temperature coefficient of
short circuit current = 0.0010 [1/k]</font></div>
<div><font color="#000080">Temperature coefficient of
open circuit voltage = -0.0038 [v/k]</font></div>
<div><font color="#000080">It's a mono-silicon based
panel. All of the parameters I sent to you are from
the product manual. The test result of open circuit
voltage also matches that value. </font></div>
<div><font color="#000080">I also want to know which
type I should use, type194 or type194b? The
parameters of Type194b's seem can be changed. But a
message " Only mode 1 has been implemented, mode 2
was created for future updates" is showed in mode
card. I'm not sure whether it has been implemented
now.</font></div>
<div>I have another question about the capacity of a
battery bank. The capacity of a battery bank will not
vary with the number of cells in series. So if it
means that the cell capacity should vary with the
number of cells in series?</div>
<div><font color="#000080">Best regards!</font></div>
</font></div>
</font></div>
<div> </div>
<div> </div>
<div><font color="#c0c0c0" face="Verdana" size="2">2011-03-13 </font></div>
<font color="#000080" face="Verdana" size="2">
<hr style="width: 100px;" align="left" color="#b5c4df"
size="1"> </font>
<div><font color="#c0c0c0" face="Verdana" size="2"><span>
<div>
<div>Guangzhao Lv</div>
</div>
</span></font></div>
<hr color="#b5c4df" size="1">
<div><font face="Verdana" size="2"><strong>发件人：</strong> David
BRADLEY </font></div>
<div><font face="Verdana" size="2"><strong>发送时间：</strong>
2011-03-09 03:24:00 </font></div>
<div><font face="Verdana" size="2"><strong>收件人：</strong>
lvguangzhao </font></div>
<div><font face="Verdana" size="2"><strong>抄送：</strong>
trnsys-users </font></div>
<div><font face="Verdana" size="2"><strong>主题：</strong> Re:
[TRNSYS-users] Questions about Type 194 and Type 665 </font></div>
<div> </div>
<div><font face="Verdana" size="2">Guangzhao,<br>
I also need to know the temperature coefficient of short
circuit current and the temperature coefficient of open
circuit voltage. Both of these should be listed on the
manufacturer's data sheet. Also, is this a silicon-based
panel or some other material? The reason I ask is that
silicon cells typically run at about 0.5V per cell so 36 in
series would have an open cell voltage more like 18V than
21.5V. Its not impossible of course.<br>
Kind regards,<br>
David<br>
<br>
<br>
On 3/8/2011 05:21, lvguangzhao wrote:
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<div><font color="#000080" face="Verdana" size="2">Hello,
David, thank you very much for your
reply.Attached are my project.Following are the
parameters that I am trying to enter into the EES.</font></div>
<div>Number of cells in series within a module = 36</div>
<div>Open circuit voltage at reference conditions =
21.5 V</div>
<div>Short ciecuit current at reference conditions
= 7.55 amp</div>
<div>Max. power voltage at reference conditions = 17.5
V</div>
<div>Max. power current at reference conditions = 6.86
amp</div>
<div>Module area = 0.92m2</div>
<div>I also have tryed to change some parameters in
EXAMPLE.VAR in the folder of Type194 ,but I didn't
know what to correct.</div>
<div>Thank you in advance !</div>
</font></div>
<div> </div>
<div> </div>
<div><font color="#c0c0c0" face="Verdana" size="2">2011-03-08
</font></div>
<font color="#000080" face="Verdana" size="2">
<hr style="width: 100px;" align="left" color="#b5c4df"
size="1"> </font>
<div><font color="#c0c0c0" face="Verdana" size="2"><span>
<div>
<div>Guangzhao Lv<br>
</div>
</div>
</span></font></div>
<hr color="#b5c4df" size="1">
<div><font face="Verdana" size="2"><strong>发件人：</strong>
David BRADLEY </font></div>
<div><font face="Verdana" size="2"><strong>发送时间：</strong>
2011-03-02 23:04:11 </font></div>
<div><font face="Verdana" size="2"><strong>收件人：</strong>
lvguangzhao </font></div>
<div><font face="Verdana" size="2"><strong>抄送：</strong>
trnsys-users </font></div>
<div><font face="Verdana" size="2"><strong>主题：</strong>
Re: [TRNSYS-users] Questions about Type 194 and Type
665 </font></div>
<div><font face="Verdana" size="2">Guangzhao,<br>
Could you please send me an email containing the
parameters that you are entering into the EES plugin
for Type194? I have run into some similar problems in
the past and may be able to help solve this one. It
sounds from what you describe as though the problem is
in launching the plugin, not actually in having the
plugin solve so perhaps you only need to send me the
Trnsys Studio project that causes the error.<br>
Kind regards,<br>
David<br>
<br>
<br>
On 3/1/2011 00:47, lvguangzhao wrote:
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type="cite">
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rel="stylesheet">
<div><font face="Verdana" size="2">Hello, I have two
questions to ask.</font></div>
<div><font face="Verdana" size="2">1. I
encountered a problem when I was trying to
change the parameters of Type 194 using EES.
A error "Missing user function or improper
format for Call statement" was showed after I
clicked on the icon on the parameter card.
What's wrong with it? </font></div>
<div>2. A convertible frequency air source heat
pump is needed in my model but I can't find one in
TRNSYS. <font style="background-color: rgb(183,
232, 189);">Is Type 665 Ok? </font></div>
<div align="left"><font color="#c0c0c0"
face="Verdana" size="2">2011-03-01 </font></div>
<font face="Verdana" size="2">
<hr style="width: 122px; height: 2px;"
align="left" size="2">
<div><font color="#c0c0c0" face="Verdana" size="2"><span>
<div>
<div>Guangzhao Lv<br>
</div>
</div>
</span></font></div>
</font>
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***************************
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Principal
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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 moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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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 moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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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>
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