[TRNSYS-users] [SPAM] - HELP: Error creating the wall transfer coefficients - E-Mail in Betreffzeile gefunden

[Nikolai Artmann]

Thanks, I found the 'problem wall'. It was a double glazing with an air
layer. After changing the construction also the error with PREBID was
solved.

 

Regards, Nikolai 

 

 

Nikolai Artmann

3-Plan Haustechnik AG, Winterthur
Telefon  052 / 234 70 66
Telefax  052 / 234 70 60
e-Mail: nikolai.artmann at 3-plan.ch <mailto:nikolai.artmann at 3-plan.ch> 

 

________________________________

Von: Marshall L Sweet/sweetml/O/VCU [mailto:sweetml at vcu.edu] 
Gesendet: Donnerstag, 16. Juli 2009 17:08
An: trnsys-users at cae.wisc.edu
Betreff: Re: [TRNSYS-users] [SPAM] - HELP: Error creating the wall
transfer coefficients - E-Mail in Betreffzeile gefunden

 

I have figured out a partial solution.  The wall that is causing the
error is never listed in the INF file.  Thus look to see what walls a
transfer coefficient were found.  Whatever wall is not in the INF file
but is used in your type 56 is the 'problem' wall.  I removed the
'problem' wall completely and used a different but similar wall.  I also
noticed that if the problem wall had a low capacity, and had a boundary
condition then that error would occur.

And yes, the error regarding the wrong version of PREBID is related to
this error.

Let me know of any solutions you come up with.

Thanks,
Marshall

-----"Nikolai Artmann" wrote: -----

	To: "Marshall L Sweet/sweetml/O/VCU" <sweetml at vcu.edu>,
<trnsys-users at cae.wisc.edu>
	From: "Nikolai Artmann" <nikolai.artmann at 3-plan.ch>
	Date: 07/16/2009 04:13AM
	Subject: AW: [SPAM] - [TRNSYS-users] HELP: Error creating the
wall transfer coefficients - E-Mail in Betreffzeile gefunden
	
	
	

	Hello Marshall 

	  

	I am getting the same error message. Have you found a solution
for this? 

	  

	Also, there are no inputs or outputs to/from Type 56. 

	  

	When I try to update the building variable list, I get the
following message: 

	  

	This INF file seems to be created with a wrong version of
PREBID. 

	  

	Is this related to the problem with the wall transfer
coefficients? 

	Thanks, Nikolai 

	  

	  

	Nikolai Artmann 

	3-Plan Haustechnik AG, Winterthur 
	Telefon  052 / 234 70 66 
	Telefax  052 / 234 70 60 
	e-Mail: nikolai.artmann at 3-plan.ch
<mailto:nikolai.artmann at 3-plan.ch> 

	  

	
________________________________


	Von: Marshall L Sweet/sweetml/O/VCU [mailto:sweetml at vcu.edu] 
	Gesendet: Dienstag, 14. Juli 2009 18:11 
	An: trnsys-users at cae.wisc.edu 
	Betreff: [SPAM] - [TRNSYS-users] HELP: Error creating the wall
transfer coefficients - E-Mail in Betreffzeile gefunden 

	  

	TRNSYS Users, 
	
	I am using TRNBuild to create a type 56 building model.  When I
save the building I get the following error message: 
	
	Error creating the wall transfer coefficients: 
	Unable to find a root after indication that a root exists. 
	Maybe the timebase is too small. 
	Please check the INF file for further information. 
	
	Upon checking the INF file the error is occurring at the end of
the file reading: 
	
	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 ! 
	
	The wall type after the last calculated wall is a ceiling
consisting of two layers (wall_board and R-13 insulation).  I have used
this exact same wall type in other models and it has worked fine.  The
coefficients (A, B, C, and D) of the transfer function for this specific
wall type are identical in both models.  The timebase is also the same.
The capacity is different but I have increased the capacity and I am
still getting the same error. 
	
	What is going on here?  Where exactly is the capacity?  What is
meant by "unable to find a root after indication that a root existed?" 
	
	Thanks in advance, 
	
	Marshall 

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