[TRNSYS-users] zone thermal time constant
David BRADLEY
d.bradley at tess-inc.com
Wed Nov 3 10:24:52 PDT 2010
Wang,
TRNBuild calculates the coefficients of a transfer function that
describes the way in which energy is transferred through a given wall.
The transfer function is basically an infinite series and each
coefficient is a multiplier on a particular term in the transfer
function (an example of one of the terms is the temperature difference
across the wall). Time is discretized into steps backwards through the
wall's history; the step size is called the time base. For example, if
the time base is 1 hour then coefficient multipliers for each term in
the transfer function will be computed for now, 1 hour ago, 2 hours ago,
3 hours ago etc.
Regards,
David
On 11/3/2010 09:46, 王洋 wrote:
>
> Dear all,
> What's the difference between the time base of transfer function (
> in Outputs of TRNBuild ) and Zone thermal time constant?
> Are they the same? If different, how to calculate the zone thermal
> time constant? based on which parameters?
> Many thanks!
> br.
> wang
>
> 2010/11/3 <trnsys-users-request at cae.wisc.edu
> <mailto:trnsys-users-request at cae.wisc.edu>>
>
> Send TRNSYS-users mailing list submissions to
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>
> Today's Topics:
>
> 1. How to calculate the zone thermal time constant & air volume
> flow of opening (=?GB2312?B?zfXR8w==?=)
>
>
> ---------- 已转发邮件 ----------
> From: 王洋 <wanghongyang1767 at gmail.com
> <mailto:wanghongyang1767 at gmail.com>>
> To: trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
> Date: Wed, 3 Nov 2010 15:29:36 +0100
> Subject: [TRNSYS-users] How to calculate the zone thermal time
> constant & air volume flow of opening
> Dear all,
> 1. How to calculate or find the thermal time constant of zone in
> TRNSYS software?
>
> ---------- WALL TYPE BST_FL_HEAT_W1 ----------
>
> THERMAL CONDUCTANCE, U= 67.80000 kJ/h m2K; U-Wert=
> 4.48235 W/m2K
> (incl. alpha_i=7.7 W/m^2 K and alpha_o=25 W/m^2 K)
>
> TRANSFERFUNCTION COEFFICIENTS
> K A B C D
>
> 0 1.7050117E+02 2.1087019E+01 1.7050117E+02
> 1.0000000E+00
> 1 -1.1800059E+02 3.5808933E+01 -1.1800059E+02
> -1.3683139E-01
> 2 6.0267372E+00 1.6298573E+00 6.0267372E+00
> 4.7362566E-05
> 3 -1.2736107E-03 2.3363784E-04 -1.2736107E-03
> SUM 5.8526043E+01 5.8526043E+01 5.8526043E+01
> 8.6321597E-01
>
> What's meaning of A B C D? Are they Wall's TRANSFERFUNCTION
> COEFFICIENTS? And what is the thermal time constant of the whole
> zone? How to calculate or find the thermal time constant of the
> whole zone in TRNSYS software?
> Need I calculate by myself the whole zone's TRANSFERFUNCTION
> based on all the walls of the zone or others?
> 2. How to calculate or find air volume flow of the window
> opening in TRNFlow software?
> The window opening area (m2)is known. Whether it needs the wind
> speed(m/s) or not?
> Many thanks!
> Br.
> wang
> 2010/11/3 <trnsys-users-request at cae.wisc.edu
> <mailto:trnsys-users-request at cae.wisc.edu>>
>
> Send TRNSYS-users mailing list submissions to
> trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
>
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> or, via email, send a message with subject or body 'help' to
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> <mailto:trnsys-users-request at cae.wisc.edu>
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>
> When replying, please edit your Subject line so it is more
> specific
> than "Re: Contents of TRNSYS-users digest..."
>
> Today's Topics:
>
> 1. Re: GenOpt optimization: problem for the second generation
> after 5 simulations (Thibaut VITTE)
> 2. Re: google sketchup+trnsys3d (hotline)
> 3. input file (Emiliano Casati - 3ME)
> 4. Re: GenOpt optimization: problem for the secondgeneration
> after 5 simulations (Timothy McDowell)
>
>
> ---------- 已转发邮件 ----------
> From: Thibaut VITTE <thibaut.vitte at h3c-energies.fr
> <mailto:thibaut.vitte at h3c-energies.fr>>
> To: trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
> Date: Wed, 03 Nov 2010 11:27:53 +0100
> Subject: Re: [TRNSYS-users] GenOpt optimization: problem for
> the second generation after 5 simulations
> Dear Alexis,
>
> I've had a similar error when I used Genopt. I've had several
> components tracked by a "trace" command that made my list file
> enormous (more than 100Mb) and genopt could'nt handle that
> amount of data.
>
> Just my 2cents.
>
> Thibaut
> --
>
> Le futur maîtrisé
>
>
>
>
> Thibaut VITTE
>
> Docteur - Ingénieur Energies
>
> Mail : thibaut.vitte at h3c-energies.fr
> <mailto:thibaut.vitte at h3c-energies.fr>
>
> -----------------------------
>
> H3C-énergies
>
> 35, chemin du vieux Chêne - 38240 MEYLAN
>
> Tél : 04 76 41 88 66– Fax : 04 76 41 28 94
>
> www.h3c-energies.fr <http://www.h3c-energies.fr/>
>
>
>
> -----------------------------------------------------------------------------------
>
> Afin de contribuer au respect de l'environnement, merci de
> n'imprimer ce message qu'en cas de nécessité.
>
> In order to respect the environment, please don't print this
> e-mail unless you really need to.
>
>
>
> ---------- 已转发邮件 ----------
> From: "hotline" <hotline at transsolar.com
> <mailto:hotline at transsolar.com>>
> To: "julia.feste" <julia.feste at whitepavilion.com.cn
> <mailto:julia.feste at whitepavilion.com.cn>>
> Date: Wed, 3 Nov 2010 11:37:08 +0100
> Subject: Re: [TRNSYS-users] google sketchup+trnsys3d
> Hi,
>
> that's a well known problem that will be fixed in the next
> version.
> Hopefully upcoming within the next weeks.
>
> Regards
> Christian
>
> TRANSSOLAR Software Team
> hotline at transsolar.com <mailto:hotline at transsolar.com>
>
> www.trnsys.de <http://www.trnsys.de/>
> Transsolar KlimaEngineering - Technologien für
> energieeffizientes Bauen
> und Nutzerkomfort in Gebäuden
> Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart /
> Amtsgericht Stuttgart - HRB 23347 / USt-IdNr.: 99073/00911
> Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas
> Auer,
> Dipl.Phys. Stefan Holst, Prof. Volkmar Bleicher
>
> -----Ursprüngliche Nachricht-----
> Von: julia.feste [mailto:julia.feste at whitepavilion.com.cn
> <mailto:julia.feste at whitepavilion.com.cn>]
> Gesendet: Mittwoch, 3. November 2010 06:46
> An: trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
> Betreff: [TRNSYS-users] google sketchup+trnsys3d
>
>
> Hello everybody,
> Thanks for your posts that's always really interesting!
> I come up with a problem using Google Sketchup and TRNSYS3D:
> inside a
> TRNSYS zone, I draft a square, then I want to pull it up at a
> certain
> height, so I write the number then Enter, and this error appears:
>
> <-----Beginning of the error----->
> ERROR:
> NoMethodError
> undefined method `position' for
> #<Sketchup::AttributeDictionary:0xfcb4eb8>
>
> BACKTRACE:
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/sketchup/Sketchup.rb:309:in `polygon_loop'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/sketchup/Sketchup.rb:309:in `each'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/sketchup/Sketchup.rb:309:in `polygon_loop'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/sketchup/Sketchup.rb:321:in `outer_polygon'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/sketchup/Sketchup.rb:326:in `polygon'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/DrawingUtils.rb:27:in
> `detect_base_face'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/DrawingUtils.rb:20:in `each'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/DrawingUtils.rb:20:in
> `detect_base_face'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/BaseSurface.rb:254:in
> `face_polygon'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/BaseSurface.rb:253:in `each'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/BaseSurface.rb:253:in
> `face_polygon'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/Surface.rb:107:in
> `update_input_object'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/BaseSurface.rb:94:in
> `update_input_object'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/interfaces/DrawingInterface.rb:353:in
> `on_change_entity'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/observers/FaceObserver.rb:32:in
> `onChangeEntity'
> C:/Program Files/Google/Google SketchUp
> 8/Plugins/Trnsys3d/lib/AsynchProc.rb:17:in `initialize'
>
> <-----End of the error----->
>
> When I pull it up manual, I don't have any problem, just when
> I write
> the number.
>
> Thanks in advance for your help,
> Julia.
> ________________________________________
> From: trnsys-users-request at cae.wisc.edu
> <mailto:trnsys-users-request at cae.wisc.edu>
> [trnsys-users-request at cae.wisc.edu
> <mailto:trnsys-users-request at cae.wisc.edu>]
> Sent: Wednesday, November 03, 2010 1:04 AM
> To: trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
> Subject: TRNSYS-users Digest, Vol 71, Issue 4
>
> Send TRNSYS-users mailing list submissions to
> trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
>
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> or, via email, send a message with subject or body 'help' to
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> <mailto:trnsys-users-request at cae.wisc.edu>
>
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> <mailto:trnsys-users-owner at cae.wisc.edu>
>
> When replying, please edit your Subject line so it is more
> specific than
> "Re: Contents of TRNSYS-users digest..."
>
> _______________________________________________
> TRNSYS-users mailing list
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> https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users
>
>
>
>
>
>
>
> ---------- 已转发邮件 ----------
> From: "Emiliano Casati - 3ME" <E.I.M.Casati at tudelft.nl
> <mailto:E.I.M.Casati at tudelft.nl>>
> To: <trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>>
> Date: Wed, 3 Nov 2010 13:19:58 +0100
> Subject: [TRNSYS-users] input file
>
> Hi to everybody!
>
> I don’t understand why, for certain projects, I can’t open the
> input file, the message is “the system cannot find the path
> specified”.
>
> Where should I find the input file?
>
> Thanks a lot
>
> ec
>
>
>
> ---------- 已转发邮件 ----------
> From: "Timothy McDowell" <mcdowell at tess-inc.com
> <mailto:mcdowell at tess-inc.com>>
> To: "Thibaut VITTE" <thibaut.vitte at h3c-energies.fr
> <mailto:thibaut.vitte at h3c-energies.fr>>,
> trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
> Date: Wed, 3 Nov 2010 07:23:05 -0500 (CDT)
> Subject: Re: [TRNSYS-users] GenOpt optimization: problem for
> the secondgeneration after 5 simulations
> This type of error in GenOpt is usually caused by an error in
> the TRNSYS
> simulation. You need to check the *.lst file for the TRNSYS
> run to see
> what the TRNSYS error is.
>
> Regards,
>
> Tim
>
>
>
>
>
> ----------------------------------
> Timothy McDowell
> Executive Vice President
> Thermal Energy System Specialists, LLC
> 22 N. Carroll St, Suite 370
> Madison, WI 53703
> Phone: 608-274-2577
> Fax: 608-278-1475
>
> ----- Original Message -----
> From: "Thibaut VITTE" <thibaut.vitte at h3c-energies.fr
> <mailto:thibaut.vitte at h3c-energies.fr>>
> Sent: Wed, November 3, 2010 5:27
> Subject:Re: [TRNSYS-users] GenOpt optimization: problem for the
> secondgeneration after 5 simulations
>
>
>
>
>
>
>
>
>
> Dear Alexis,
>
> I've had a similar error when I used Genopt. I've had several
> components tracked by a "trace" command that made my list file
> enormous (more than 100Mb) and genopt could'nt handle that
> amount of
> data.
>
> Just my 2cents.
>
> Thibaut
> --
>
>
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>
>
>
>
>
>
>
>
>
>
> Le futur maîtrisé
>
>
>
>
>
>
>
> Thibaut VITTE
> Docteur - Ingénieur Energies
> Mail : thibaut.vitte at h3c-energies.fr
> <mailto:thibaut.vitte at h3c-energies.fr>
>
> -----------------------------
> H3C-énergies
> 35, chemin du vieux Chêne - 38240 MEYLAN
> Tél : 04 76 41 88 66 – Fax : 04 76 41 28
> 94
> www.h3c-energies.fr <http://www.h3c-energies.fr/>
>
>
>
>
>
>
>
>
> -----------------------------------------------------------------------------------
> Afin de contribuer au respect de l'environnement,
> merci de n'imprimer ce message qu'en cas de nécessité.
> In order to respect the environment, please don't
> print this e-mail unless you really need to.
>
>
>
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu <mailto:TRNSYS-users at cae.wisc.edu>
> https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users
>
>
> ----- End of original message -----
>
>
>
> _______________________________________________
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>
>
>
> _______________________________________________
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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
d.bradley at tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com
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