[TRNSYS-users] WALL TRANSFERFUNCTION CALCULATIONS &TIMEBASE

David BRADLEY d.bradley at tess-inc.com
Thu Feb 17 13:15:51 PST 2011


Wang,
  you have the thickness of your brick layer set to zero:

WALL WALL001
  LAYERS   = BRICK
  THICKNESS= 0
  ABS-FRONT= 0.6   : ABS-BACK= 0.6
  EPS-FRONT= 0.9   : EPS-BACK= 0.9
  HFRONT   = 11 : HBACK= 64

open the wall type manager and set a thickness for the brick. It is 
still does not find the transfer function coefficients you may need to 
*/decrease/* the timebase. Increasing the time base helps if you have 
high mass, thick walls. Decreasing helps if you have lightweight low 
mass walls.
David


On 2/17/2011 11:21, 王洋 wrote:
> Dear all,
>
> I met this error:
>
>
>           ***** WALL TRANSFERFUNCTION CALCULATIONS *****
>
>  UNABLE TO FIND A ROOT AFTER INDICATION THAT A ROOT EXISTED
>
>  CHECK THE WALL TYPE AFTER THE LAST CALCULATED WALL
>  OFTEN THE WALL CAPACITY IS TO SMALL TO CALCULATE A TRANSFER FUNCTION !
>
>  CHECK ALSO YOUR TIMEBASE !
>
>
>
> Attached is INF file, Please check it!
>
>
> And I make the timebase larger, but it still doesn't work.
>
> Many thanks!
>
> Br.
>
> wang
>
>
>
> 2011/2/16 <trnsys-users-request at cae.wisc.edu 
> <mailto:trnsys-users-request at cae.wisc.edu>>
>
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>     Today's Topics:
>
>       1. length and witdh from the collector area (Sancho,Fernando)
>       2. Re: g95 compiler (Francois Badinier)
>
>
>     ---------- 已转发邮件 ----------
>     From: "Sancho,Fernando" <fsancho at sonnenwaermeag.de
>     <mailto:fsancho at sonnenwaermeag.de>>
>     To: <trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>>
>     Date: Wed, 16 Feb 2011 11:48:55 +0100
>     Subject: [TRNSYS-users] length and witdh from the collector area
>
>     Hello TRNSYS-users,
>
>     I’m making simulations with plastic collector. Many from the
>     commercial models can be resized, so it’s almost free how to
>     configurate the collector area. I would like to find  an optimal
>     distribution, dependent of course on Radiation, temperatures etc…,
>     basically how long and width for a minimum output temperature of
>      the fluid. Or just what is the best for a certain situation
>     10m*30m or 30m*10m ?.
>
>     I ´ve already done my calculations with Excel and know that longer
>     means higher output temperature but lower energy gain… but with
>     trnsys  it’s difficult to face the problem ,
>
>     do I take a standard unit and probe around different series und
>     parallel distributions L?
>
>     Do type 553 and 559 in TESS TRn17 do that; difference width and
>     length (I didn’t find it in the general pdf… and have just
>     occasionally access to TRNSYS17)?
>
>     Any advice or experience?
>
>     So Thanks a lot!!!!!
>
>     Mit freundlichen Grüßen
>
>     Fernando Sancho Márquez
>
>     PHÖNIX SonnenWärme AG
>
>     ____________________________________________
>     PHÖNIX Sonnenwärme AG
>     Ostendstr. 1
>
>     D-12459 Berlin
>
>
>
>     ---------- 已转发邮件 ----------
>     From: "Francois Badinier" <francois.badinier at icax.co.uk
>     <mailto:francois.badinier at icax.co.uk>>
>     To: <mabadie at univ-lr.fr <mailto:mabadie at univ-lr.fr>>,
>     <trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>>
>     Date: Wed, 16 Feb 2011 15:02:13 -0000
>     Subject: Re: [TRNSYS-users] g95 compiler
>     Marc
>
>     If you still want to use g95, an alternative is to define T0,
>     Tfinal and
>     Timestep as parameters in our new component. The only drawback is
>     that you
>     have to be careful to change those values whenever you change them
>     in the
>     simulation studio.
>
>     Regards,
>
>     François Badinier
>     Development Engineer
>     ICAX Ltd
>     1 Berry Street
>     London EC1M 5PS
>     francois.badinier at icax.co.uk <mailto:francois.badinier at icax.co.uk>
>     www.icax.co.uk <http://www.icax.co.uk>
>
>
>
>     -----Original Message-----
>     From: trnsys-users-bounces at cae.wisc.edu
>     <mailto:trnsys-users-bounces at cae.wisc.edu>
>     [mailto:trnsys-users-bounces at cae.wisc.edu
>     <mailto:trnsys-users-bounces at cae.wisc.edu>] On Behalf Of
>     mabadie at univ-lr.fr <mailto:mabadie at univ-lr.fr>
>     Sent: 14 February 2011 11:57
>     To: trnsys-users at cae.wisc.edu <mailto:trnsys-users at cae.wisc.edu>
>     Subject: Re: [TRNSYS-users] g95 compiler
>
>     Danny and David,
>
>     I actually successfully used the G95 compiler with TRNSYS 16 to create
>     new components. However, i was not able to properly used TRNSYS
>     variables (such as getSimulationTime()) in my TYPES. The only solution
>     i found was to stop using this compiler and buying Intel Fortran v11.
>
>     I hope you will find a way to fix that problem as it is nice to have
>     the choice of a free/light fortran compiler.
>
>     Best,
>
>     -- Marc O. Abadie
>
>
>     David BRADLEY <d.bradley at tess-inc.com
>     <mailto:d.bradley at tess-inc.com>> a écrit :
>
>     > Danny,
>     >   getSimulationTime is a function that is defined in the data module
>     > called "TrnsysFunctions." When compiling an external Type in either
>     > the Compaq or the Intel compilers, I have to make sure that the
>     > compiler is set to look for data modules (sometimes called MOD
>     > files) in the ..\Trnsys17\Compilers\IVF111\Debug\ directory or else
>     > copy them to some other place where they can be found by the
>     > compiler. My understanding is that this tells the compiler "don't
>     > worry, even though I haven't defined this function called
>     > getSimulationTime() in my external Type242.dll, you'll find that
>     > function during run-time because my dll will be called by a dll in
>     > which the function is defined"
>     >
>     >   I don't know how the G95 compiler handles settings for where to
>     > look for *.mod files but this is not specific to Trnsys17, there
>     > were a number of TrnsysFunctions called by Types in Trnsys16 as
>     > well. We have just expanded their use in Trnsys17.
>     > best,
>     >  David
>     >
>     >
>     > On 2/11/2011 11:12, Danny Jonas wrote:
>     >>
>     >> Dear TRNSYS users,
>     >>
>     >> I have use the directions in the document, but after starting the
>     >> batch file to compile my own type I've received the following
>     >> message:
>     >>
>     >> "In file Type201.for:72
>     >>
>     >>                Time=getSimulationTime<>
>     >>
>     >> Error: Function 'getsimulationtime' at <1> has no implicit type"
>     >>
>     >> could the error be associated with using TRNSYS17?
>     >>
>     >> Using the example (type242), I can build the type242.dll.
>     >>
>     >> I'm now trying to use C++, till now it works fine. But I still
>     >> don't understand why it doesn't work with the batch file as fortran
>     >> code....
>     >>
>     >> Thanks a lot,
>     >>
>     >> Best Regards,
>     >>
>     >> Danny
>     >>
>     >> -----Ursprüngliche Nachricht-----
>     >>
>     >> Von: Daniel Bergey [mailto:daniel at buildingscience.com
>     <mailto:daniel at buildingscience.com>]
>     >>
>     >> Gesendet: Mittwoch, 9. Februar 2011 21:14
>     >>
>     >> An: Danny Jonas
>     >>
>     >> Betreff: Re: [TRNSYS-users] g95 compiler
>     >>
>     >> I have successfully compiled a couple of components using
>     >> directions in the attached document.  I don't recall the URL whence
>     >> I downloaded it originally.  Sorry about the doc format; let me
>     >> know if I should convert it.
>     >>
>     >> Daniel
>     >>
>     >> On Fri, Feb 04, 2011 at 01:33:49PM +0100, Danny Jonas wrote:
>     >>
>     >>>    Dear TRNSYS users,
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    I want to use the free g95 compiler to create my own components
>     >>> in TRNSYS.
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    I have found the following message in the TRNSYS-users
>     Archives:
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     [1]http://mailman.cae.wisc.edu/pipermail/trnsys-users/2008/003957.html
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    with the following link:
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    [2]http://software.cstb.fr/main/articles.asp?langue=us
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    But this page no longer exists.
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    Can someone send a link where I can download this example?
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    Thanks in advance,
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>    Danny
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>>
>     >>
>     >>> References
>     >>
>     >>>
>     >>
>     >>>    Visible links
>     >>
>     >>>    1.
>     http://mailman.cae.wisc.edu/pipermail/trnsys-users/2008/003957.html
>     >>
>     >>>    2. http://software.cstb.fr/main/articles.asp?langue=us
>     >>
>     >>> _______________________________________________
>     >>
>     >>> TRNSYS-users mailing list
>     >>
>     >>> TRNSYS-users at cae.wisc.edu <mailto:TRNSYS-users at cae.wisc.edu>
>     <mailto:TRNSYS-users at cae.wisc.edu <mailto:TRNSYS-users at cae.wisc.edu>>
>     >>
>     >>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>     >>
>     >>
>     >> _______________________________________________
>     >> TRNSYS-users mailing list
>     >> TRNSYS-users at cae.wisc.edu <mailto:TRNSYS-users at cae.wisc.edu>
>     >> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>     >
>     > --
>     > ***************************
>     > 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 <mailto:d.bradley at tess-inc.com>
>     >
>     > http://www.tess-inc.com
>     > http://www.trnsys.com
>     >
>     >
>
>
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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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