[TRNSYS-users] TRNSYS-users Digest, Vol 77, Issue 60

Tue May 17 12:49:22 PDT 2011

Dear ALL:
I spent one whole day to draw the building in the google sketchup in order
to create the IDF file. but i can not input to the simulation studio when i
use the trnsys muti-zone option. If any one can tell the reason, i really
appreciate it.I really don't wanna waste another whole day to redo it !
Thank you so much much!!
And the IDF file is attached.
waiting for your reply!

And by the way, i found a err for the newest version of simulation studio.
when i input the trnsys 3d using the IDF, i found the capacitance is set 0
automatically while the old version 17.000007 works well.

Best Regards!

Jiang

On Tue, May 17, 2011 at 11:20 AM, <trnsys-users-request at cae.wisc.edu> wrote:

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> Today's Topics:
>
>   1. Re: thermosyphon sdwh (keilholz, werner)
>   2. email (Adwit Kashyap)
>   3. query regarding runtime error (Adwit Kashyap)
>   4. Re: Error: generating shading/insolation matrix (Marion Hiller)
>   5. Type553 collector performance question (Nicholas LaHam)
>   6. Validated (unglazed, or any other...) collector type (Philip Horn)
>
>
> ---------- Forwarded message ----------
> From: "keilholz, werner" <werner.keilholz at cstb.fr>
> To: "Enmisagh at aol.com" <Enmisagh at aol.com>, "trnsys-users at cae.wisc.edu" <
> trnsys-users at cae.wisc.edu>
> Date: Tue, 17 May 2011 08:59:37 +0000
> Subject: Re: [TRNSYS-users] thermosyphon sdwh
>
> Grüss Gott to the people in Munich ! Do you know there’s TRNSYS facebook
> group, as well as a LinkedIn group?
>
> You could meet there an set up a local event.
>
>
>
> *De :* trnsys-users-bounces at cae.wisc.edu [mailto:
> trnsys-users-bounces at cae.wisc.edu] *De la part de* Enmisagh at aol.com
> *Envoyé :* dimanche 15 mai 2011 15:56
> *À :* trnsys-users at cae.wisc.edu
> *Objet :* [TRNSYS-users] thermosyphon sdwh
>
>
>
> hi all
>
> i want to model a thermosiphon sdwh . in this model the outlet temperature
> is 55 c . if I want to use auxiliary heater , how can I set outlet
> temperature?
>
>
> ---------- Forwarded message ----------
> From: Adwit Kashyap <kashyap.adwit235 at gmail.com>
> To: trnsys-users at cae.wisc.edu
> Date: Tue, 17 May 2011 14:56:22 +0530
> Subject: [TRNSYS-users] email
> kashyap.adwit235 at gmail.com
>
> ---------- Forwarded message ----------
> From: Adwit Kashyap <kashyap.adwit235 at gmail.com>
> To: trnsys-users at engr.wisc.edu
> Date: Tue, 17 May 2011 15:24:02 +0530
> Subject: [TRNSYS-users] query regarding runtime error
> hi. i am a fairly new user. i made a simple solar pv project using types
> 109-user for weather data, 94-a pv array, 65-d online plotter without file,
> an equation and a system printer. the time period was from 0 to 8670 hours.
> on running the simulation, it shows zero simulation time and the output
> file shows only one row of values, all zeroes.
>
> also, when i save it in C:>Program Files (x86)>Trnsys>MyProjects, it is not
> visible in the folder, but is visible when u use the File>Open option in
> Trnsys Studio and go to the location.
> i tried saving the project in a different drive and then it got saved.
>
>
> ---------- Forwarded message ----------
> From: "Marion Hiller" <hiller at transsolar.com>
> To: "joke.d" <joke.d at vkgroup.be>
> Date: Tue, 17 May 2011 13:26:54 +0200
> Subject: Re: [TRNSYS-users] Error: generating shading/insolation matrix
> Joke,
>
> the error message is due to too surface numbers > 999. The surface
> number can't be written in the log file (artsmetiers7_shd.log) and ***
> are written instead.
>
> *** Notice at time        :         0.000000
>  Orientation of wall   SURF=***: azimuth angle= 180.00°, slope=  90.00°
>  Orientation of wall   SURF=***: azimuth angle=   0.00°, slope=   0.00°
>
> In order to see why the surface numbers are so high (starting with
> 3993 instead of 1) I need to need the original *.idf and check the
> import function.
>
> With what version of TRNSYS17 are you working? I have in mind that we
> fixed such a bug created by the import.
>
> Kind regards,
>
> Marion
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: Joke De Beuckelaer [mailto:joke.d at vkgroup.be]
> Gesendet: Donnerstag, 12. Mai 2011 08:58
> An: duffy at tess-inc.com; trnsys-users at cae.wisc.edu
> Betreff: Re: [TRNSYS-users] Error: generating shading/insolation matrix
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>
>
>
>
>
> ---------- Forwarded message ----------
> From: Nicholas LaHam <ndlaham at gmail.com>
> To: trnsys-users at cae.wisc.edu
> Date: Tue, 17 May 2011 12:01:56 -0400
> Subject: [TRNSYS-users] Type553 collector performance question
> Hey all,
>
> I have a question about the Type553 Unglazed collector and how it's
> performance interacts when changing flowrates in two different scenarios. I
> was wondering if someone could help explain the trend in a practical way for
> me so I can explain it to my colleague.
>
> First off, when just running a constant flowrate and
> constant incoming temperature as the inputs to the collector, I can see that
> increasing that flowrate increases the useful energy out of the collector.
> This makes sense and is intuitive.
>
> Now when I use a loop instead for the same collector, (say with a pump
> operating at 1 GPM just as a starting point), and a perfect heat exchanger
> with the same incoming water temp now on the load side of the HX, I see a
> different trend I'm having trouble explaining to my colleague.
>
> What is happening is that the useful energy increases like the first
> scenario, but only up to the flowrate that is on the load side of the HX.
> *ex. So if I have 5 GPM on my load side, I see an increase in performance
> up to 5 gpm on my collector side, and then the performance begins to drop
> after increasing it any further.*
>
> Another way to say it is that whenever my flowrate of the collector array
> is greater then my load I have weakened performance. It seems that a 1:1
> flow ratio on each side of the HX is the optimal method (assuming same
> specific heats).
>
> Can anyway explain in a conceptual manner why there is this decrease only
> when using the HX? I was thinking that because the load side of the HX is
> the limiting flow (the one that isn't changing) then because the collector
> flow is higher, that not all the heat from the collector can be transfered,
> leaving the outlet of the HX on the collector side hotter than if the flows
> were balanced. Thus in turn lowering the efficiency and available energy to
> be collected the next time it passes through the collector.
>
> I can actually see the source side temp coming out of the HX hotter than
> the incoming water when the collector flow is higher, but my colleague still
> thinks the energy should not drop. He believes that when increasing the flow
> up to a very large number over many trials, the useful energy will always
> rise up until it levels off asymptotically, whereas in my case, it is doing
> more of a bell curve and dropping off after it becomes higher than the load
> flowrate.
>
> Thanks for any help.
> Nick LaHam
>
>
> ---------- Forwarded message ----------
> From: Philip Horn <phorn at fraunhofer.org>
> To: "trnsys-users at cae.wisc.edu" <trnsys-users at cae.wisc.edu>
> Date: Tue, 17 May 2011 12:23:20 -0400
> Subject: [TRNSYS-users] Validated (unglazed, or any other...) collector
> type
>
> Dear All,
>
>
>
> I am searching for a experimentally validated unglazed collector setting in
> TRNSYS (with values of Inputs, Parameters, assumptions, etc.).
>
>
>
> I am currently working on an unglazed polymer PVT collector with
> rectangular flow channels (so NOT a fin-type collector.
>
>
>
> I would like to compare my attempts with similar systems. As there are
> probably no “really similar” systems available, any validated solar
> collector model will be helpful.
>
>
>
> Ideally with long term measurements validation.
>
>
>
> Can someone comment on the accuracy of the default values for the collector
> types, e.g. is it a good enough reference to simply use a TRNSYS type out of
> the box?
>
>
>
> Would  some standard decks from IEA tasks work (I think they exist, right?)
> for my purpose?
>
>
>
> I am currently reading about *Type 132*, but till now I could not find any
> download link (and it should be openly available if I understood correctly).
>
>
> Can anyone help on that?
>
>
>
> I am not sure about the validity of my potential results, as I do not have
> a prototype yet, so I try to judge how I could somewhat validate by
> comparison.
>
>
>
> Your help is highly appreciated!!
>
>
>
> Best from freezing Boston,
>
> Philip
>
>
>
>
>
>
>
> _______________________________________________
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> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>
>
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