AW: AW: [TRNSYS-users] Prebid problem

[Susanna Medel]

Hi Vincent,
I think that the message means that there is a problem with the wall after
wall type PORTE. Look in your prebid file under wall type manager which is
the wall after PORTE and then try to find a possible error there. I get this
error sometimes when the thickness from one of the layers to small was (well
I solved my error changing the thickness from some layers!). Another thing
that I would do is to change the timebase of my project. You will find it
under outputs.

Hope it helps and good luck!

Best regards,
Susanna Medel

-----Ursprungliche Nachricht-----
Von: trnsys-users-admin at engr.wisc.edu
[mailto:trnsys-users-admin at engr.wisc.edu]Im Auftrag von Vincent
CORNILLON
Gesendet: Freitag, 16. Juli 2004 16:29
An: trnsys-users at engr.wisc.edu
Betreff: Re: AW: [TRNSYS-users] Prebid problem


that helps me thank you but II still have this error message:

"Error creating wall transfer function coefficients: unable to find a root
after indication that a root exists. Maybe timebase is too small"

my inf file's end is:

             ---------- WALL TYPE PORTE               ----------

       THERMAL CONDUCTANCE, U=    10.44000 kJ/h m2K; k-Wert=     1.94240
W/m2K

                        TRANSFERFUNCTION COEFFICIENTS
   K            A              B              C              D

   0       4.3750859E+01    2.9536054E-01    4.3750859E+01    1.0000000E+00
   1      -4.9582367E+01    3.0792321E+00   -4.9582367E+01   -5.4767590E-01
   2       1.1190504E+01    1.5945760E+00    1.1190504E+01    2.8816673E-02
   3      -3.3672790E-01    5.3423010E-02   -3.3672790E-01   -4.4913417E-05
   4       3.7246134E-04    4.9167750E-05    3.7246134E-04
  SUM      5.0226408E+00    5.0226408E+00    5.0226408E+00    4.8109586E-01

 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 !


Do you or anyone have an idea of what I can do to avoid this error?

Thank you for your help

Vincent Cornillon


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