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Re: [TRNSYS-users] Type 533



Stefania,
In addition to Matt's reply, the energy balance error output is the amount of energy that is not accounted for by the other terms of the energy balance (energy due to liquid flow into the tank, energy due to liquid flow out of the tank, thermal losses, miscelaneous gains, flue losses, etc.) Sometimes when all of the terms of the energy balance have been summed, there is a tiny bit left over. This is referred to as the energy balance error. It should be nearly zero. If it is not, then you may need to adjust your simulation time step or tolerances. If there is an energy balance error, this does not stop the simulation.
Kind regards,
David


stefania.agosta@dttn.it wrote:
Hallo,

I am trying to use type 533 (TESS Vertical TS tank) and I had to manage
with different problems:

1.
The default Type (the one you select from the direct access) seems to
contain 2 energy balance errors: try to click on the INFORMATION button of
the Type, then VARIABLES, then ALL: you can see
Parameter 30: Tank energy balance error
Parameter 38: HX energy balance error
(the input file is: .\Tess Models\PlugIns\Example_534.dat )
It happens that probably  these errors generate an error while trying to
run the simulation.

2.
Changing some parameters of the plugin data, this message appears:
"Problem writing the output data, please check the entered file name".

3.
So I tryed to rename and relocate this input file in the same directory of
the studio file, I select this new file from the EXTERNAL FILE tab, but
then the program gives me three error messages when I try to open the
plugin:
 "not able to find the data file input: please reselect the file using the
browse button"+"entered value greater than maximum"+"runtime error:
invalid property value"

Could someone give me some advice on how to manage this type 533. I found
out that others had some problem dealing with it but I could not find any
solution to my problems.

Best regards

Stefania Agosta
Student, University of Trento



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Thermal Energy System Specialists (TESS), LLC David BRADLEY 22 N. Carroll Street - Suite 370 Partner Madison, WI 53703 USA P: +1.608.274.2577 F: +1.608.278.1475 E-mail: bradley@tess-inc.com Web Pages: http://www.tess-inc.com and http://www.trnsys.com

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