Re: [TRNSYS-users] What is the TOLERANCE meaning?

[David Bradley <bradley@tess-inc.com>]

Logan, 
  
  The TOLERANCES statement is a control statement used to specify
the error tolerances to be used during a TRNSYS simulation. The statement
has the form:

TOLERANCES  eD  eA
or
TOLERANCES  -zD  -zA

where

eD

      

is a relative (and
zD is an absolute) error tolerance controlling the integration
error.
eA

      

is a relative (and
zA is an absolute) error tolerance controlling the convergence of input
and output variables.

Example:

        

The error tolerances eD and eA are both to be set to one-tenth of one
percent.  The TOLERANCES statement is then

TOLERANCES  .001  .001

The tolerances for the new equation solver (SOLVER=1) are considered
differently.  The mean standard deviation for all of the equations
is calculated and must be less than the specified tolerances to reach
convergence.
Regards,
  David

At 09:37 PM 2/27/2005, Logan Wong wrote:
> Dear All,
>  
> I would like to know the definition of the "Tolerance
> Convergence" in Global Infos. Because I loss the TRNSYS manual
> (Volume I). Is it a percentage no?
> When I changed this value from 0.001(define) to 0.4, my data output has a
> lot of difference.
>  
> Thanks.
> Logan
>
>
> ²á¤Ñ«Ç¡B¦¬­µ¾÷¡BGames µ¥¦h¶µ¥\¯à
> ¥þ·s Yahoo! Messenger
> http://messenger.yahoo.com.hk
>  
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users@engr.wisc.edu
> https://www.cae.wisc.edu/mailman/listinfo/trnsys-users

****************************************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley@tess-inc.com
Web Pages:  http://www.tess-inc.com     and      http://www.trnsys.com

"Providing software solutions for today's energy engineering projects"
****************************************************************************************