Re: WALL TIMEBASE and timesteps

[Michaël Kummert <kummert@xxxxxxxxxxxxx>]

on 2003-12-10 07:56, Tomas Persson wrote:
> Hi!
> I have also had some problems with increasing temperatures up to several 
> hundred Celcius inside type 56 (self-heating!?). It looks like if there 
> is a large deck-file with a hundred different components, type 56 should 
> be placed in the beginning of the deck-file, to avoid "self-heating"
>
> I have also had self-heating, when I used type 2 (on-off controler) with 
> the "new control strategy". Check that you don´t use the "new control 
> strategy" if you have the on-off controler in your deck-file.
The "Type2 and New Control Strategy" problem might be an explanation of 
the problem: in TRNSYS releases older than 15.3.00, there is no check 
that the mode used for Type 2 corresponds to the selected solver. And it 
is true that using a solver and a Type 2 mode that do not match each 
other can lead to very strange results (including inexplicable 
temperature increase of Type 56).
TRNSYS 15.3.00 now gives an error message and stops the simulation.

Just to make sure there is no misunderstanding, Type 2 works fine with 
both solvers, you just have to make sure you use the corresponding mode.

Kind regards,

Michaël Kummert


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Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
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