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[TRNSYS-users] zone thermal time constant


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@cae.wisc.edu>
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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@gmail.com>
To: trnsys-users@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@cae.wisc.edu>
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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@h3c-energies.fr>
To: trnsys-users@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@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

-----------------------------------------------------------------------------------

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@transsolar.com>
To: "julia.feste" <julia.feste@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@transsolar.com

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@whitepavilion.com.cn]
Gesendet: Mittwoch, 3. November 2010 06:46
An: trnsys-users@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@cae.wisc.edu
[trnsys-users-request@cae.wisc.edu]
Sent: Wednesday, November 03, 2010 1:04 AM
To: trnsys-users@cae.wisc.edu
Subject: TRNSYS-users Digest, Vol 71, Issue 4

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---------- 已转发邮件 ----------
From: "Emiliano Casati - 3ME" <E.I.M.Casati@tudelft.nl>
To: <trnsys-users@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@tess-inc.com>
To: "Thibaut VITTE" <thibaut.vitte@h3c-energies.fr>, trnsys-users@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@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@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







     -----------------------------------------------------------------------------------
     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.






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