Dear all,<br><br> I have some questions about TRNSYS as follows:<br><br>1. What's the range of the error(difference) between the Ideal Heating's QHEAT after running in TRNSYS and the actual heating's QHEAT? i.e. What's Max. and Min. error(difference) range?<br>
<br>2. What's the range of the error(difference) between the temperature sensor in TRNSYS? What's the precision(accuracy) of the temperature in TRNSYS? Or how does the temperature sensor measure the temperature Tair, Top etc.? <br>
<br>3. Whether does the TRNSYS calculate Transfer function coefficients based on ASHRAE's methods such as Transfer function method or other methods? What's the range of the error(difference) between this TRNSYS' method(Transfer function method) and the actual situation?<br>
<br>The reason that I ask some about errors is I think my some simulation results are so different from the actual situation etc.<br><br>Many thanks!<br>Br.<br><br>wang<br><br><br>
<div class="gmail_quote">在 2011年3月28日 下午6:51，王洋 <span dir="ltr"><<a href="mailto:wanghongyang1767@gmail.com">wanghongyang1767@gmail.com</a>></span>写道：<br>
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<div class="gmail_quote">2011/3/27 <span dir="ltr"><<a href="mailto:trnsys-users-request@cae.wisc.edu" target="_blank">trnsys-users-request@cae.wisc.edu</a>></span><br>
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<br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of TRNSYS-users digest..."<br><br>Today's Topics:<br><br> 1. Re: Questions about Type 194 and Type 665<br> (=?utf-8?B?bHZndWFuZ3poYW8=?=)<br>
<br><br>---------- 已转发邮件 ----------<br>From: "lvguangzhao" <<a href="mailto:lvguangzhao@126.com" target="_blank">lvguangzhao@126.com</a>><br>To: "David BRADLEY" <<a href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>><br>
Date: Sun, 27 Mar 2011 16:51:10 +0800<br>Subject: Re: [TRNSYS-users] Questions about Type 194 and Type 665<br>
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<div><font color="#000080" size="2" face="Verdana">Hello David, thank you for your help! Now I encounter a new problem. Current to load not current to battery exsits when the heat pump is not in operation. Though the irradiance during that time is low, but I think the battery bank should be charged when it's not fully charged. Thank you in advance! </font></div>
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<div><font color="#c0c0c0" size="2" face="Verdana">2011-03-27 </font></div>
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<div>-----------------------------------------<br>Guangzhao Lv<br></div></div></span></font></div>
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<div><font size="2" face="Verdana"><b>发件人：</b> David BRADLEY </font></div>
<div><font size="2" face="Verdana"><b>发送时间：</b> 2011-03-15 05:05:06 </font></div>
<div><font size="2" face="Verdana"><b>收件人：</b> lvguangzhao </font></div>
<div><font size="2" face="Verdana"><b>抄送：</b> trnsys-users </font></div>
<div><font size="2" face="Verdana"><b>主题：</b> Re: [TRNSYS-users] Questions about Type 194 and Type 665 </font></div>
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<div><font size="2" face="Verdana"><font size="2" face="Verdana">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:
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<div><font color="#000080" size="2" face="Verdana">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>
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<div><font color="#c0c0c0" size="2" face="Verdana">2011-03-13 </font></div><font color="#000080" size="2" face="Verdana">
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<div>Guangzhao Lv</div></div></span></font></div>
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<div><font size="2" face="Verdana"><b>发件人：</b> David BRADLEY </font></div>
<div><font size="2" face="Verdana"><b>发送时间：</b> 2011-03-09 03:24:00 </font></div>
<div><font size="2" face="Verdana"><b>收件人：</b> lvguangzhao </font></div>
<div><font size="2" face="Verdana"><b>抄送：</b> trnsys-users </font></div>
<div><font size="2" face="Verdana"><b>主题：</b> Re: [TRNSYS-users] Questions about Type 194 and Type 665 </font></div>
<div></div>
<div><font size="2" face="Verdana">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" size="2" face="Verdana">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>
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<div><font color="#c0c0c0" size="2" face="Verdana">2011-03-08 </font></div><font color="#000080" size="2" face="Verdana">
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<div>Guangzhao Lv<br></div></div></span></font></div>
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<div><font size="2" face="Verdana"><b>发件人：</b> David BRADLEY </font></div>
<div><font size="2" face="Verdana"><b>发送时间：</b> 2011-03-02 23:04:11 </font></div>
<div><font size="2" face="Verdana"><b>收件人：</b> lvguangzhao </font></div>
<div><font size="2" face="Verdana"><b>抄送：</b> trnsys-users </font></div>
<div><font size="2" face="Verdana"><b>主题：</b> Re: [TRNSYS-users] Questions about Type 194 and Type 665 </font></div>
<div><font size="2" face="Verdana">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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<div><font size="2" face="Verdana">Hello, I have two questions to ask.</font></div>
<div><font size="2" face="Verdana">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" size="2" face="Verdana">2011-03-01 </font></div><font size="2" face="Verdana">
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<div>Guangzhao Lv<br></div></div></span></font></div></font><pre><fieldset></fieldset>
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David BRADLEY
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22 North Carroll Street - suite 370
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P:+1.608.274.2577
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***************************
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 href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>
<a href="http://www.tess-inc.com/" target="_blank">http://www.tess-inc.com</a>
<a href="http://www.trnsys.com/" target="_blank">http://www.trnsys.com</a></pre></font></div></blockquote><br><pre 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 href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>
<a href="http://www.tess-inc.com/" target="_blank">http://www.tess-inc.com</a>
<a href="http://www.trnsys.com/" target="_blank">http://www.trnsys.com</a></pre></font></div></div><br>_______________________________________________<br>TRNSYS-users mailing list<br><a href="mailto:TRNSYS-users@cae.wisc.edu" target="_blank">TRNSYS-users@cae.wisc.edu</a><br>
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