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Today's Topics:
1. Re: Questions about Type 194 and Type 665
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---------- 已转发邮件 ----------
From: "lvguangzhao" <lvguangzhao@126.com>
To: "David BRADLEY" <d.bradley@tess-inc.com>
Date: Sun, 27 Mar 2011 16:51:10 +0800
Subject: Re: [TRNSYS-users] Questions about Type 194 and Type 665
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!2011-03-27-----------------------------------------
Guangzhao Lv
发件人： David BRADLEY发送时间： 2011-03-15 05:05:06收件人： lvguangzhao抄送： trnsys-users主题： Re: [TRNSYS-users] Questions about Type 194 and Type 665Guangzhao
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.
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.
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.
Kind regards,
David
On 3/14/2011 08:21, lvguangzhao wrote:Hello,David,I urgently want to get your help.Following are the parameters I missed.Temperature coefficient of short circuit current = 0.0010 [1/k]Temperature coefficient of open circuit voltage = -0.0038 [v/k]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.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.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?Best regards!2011-03-13
Guangzhao Lv
发件人： David BRADLEY发送时间： 2011-03-09 03:24:00收件人： lvguangzhao抄送： trnsys-users主题： Re: [TRNSYS-users] Questions about Type 194 and Type 665Guangzhao,
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.
Kind regards,
David
On 3/8/2011 05:21, lvguangzhao wrote: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.Number of cells in series within a module = 36Open circuit voltage at reference conditions = 21.5 VShort ciecuit current at reference conditions = 7.55 ampMax. power voltage at reference conditions = 17.5 VMax. power current at reference conditions = 6.86 ampModule area = 0.92m2I also have tryed to change some parameters in EXAMPLE.VAR in the folder of Type194 ,but I didn't know what to correct.Thank you in advance !2011-03-08
Guangzhao Lv
发件人： David BRADLEY发送时间： 2011-03-02 23:04:11收件人： lvguangzhao抄送： trnsys-users主题： Re: [TRNSYS-users] Questions about Type 194 and Type 665Guangzhao,
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.
Kind regards,
David
On 3/1/2011 00:47, lvguangzhao wrote:Hello, I have two questions to ask.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?2. A convertible frequency air source heat pump is needed in my model but I can't find one in TRNSYS. Is Type 665 Ok?2011-03-01
_______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://mailman.cae.wisc.edu/listinfo/trnsys-usersGuangzhao Lv-- *************************** 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 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com-- *************************** 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 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com-- *************************** 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 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com
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