Re: [TRNSYS-users] LITTLE ADVICE ON TYPE 60+TYPE 2

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

Lorenzo, et al.
  The Powell's method solver is included in TRNSYS primarily for
systems that have no capacitance in them (PV directly coupled to a
resistive load for example). It's use is almost never warranted when you
have a system that includes capacitance such as one with a thermal
storage tank in it. If you are having trouble with instability and
controllers, I would go to a good bit of effort to discover the cause of
the problem using the successive substitution method before trying to use
the Powell's method solver.
Kind regards,
 David

At 05:16 3/16/2006, Lorenzo Zamboni wrote:
> Dear all,
>     I would like to give a little advice on the use of
> type 2 (controller) with type 60 (storage tank). The new version of type
> 2 is supposed to be solved using Powell's method, however, up to me, the
> simulation is not working properly due to convergence problems (also
> bringing plenty of time). On the other hand using the old version of type
> 2 would remove that unwanted behaviour. I hope this comment could
> help.
>
> cordially,
> Lorenzo
>
> -- 
> ||||||||||||||||||||||||||||||||||||||||||||
> Lorenzo Zamboni
> - Ing - PhD - 
>
> UNIVERSITA' DI PADOVA
> Dipartimento  di Tecnica e Gestione
> dei sistemi industriali [DTG]
>
> UNIVERSITY OF PADOVA
> Department of industrial management 
> and engineering
>  
> stradella S.Nicola, 3
> 36100 VICENZA - ITALY
> phone: +39 0444 99 87 78
> mobile: +39 349 73 06 450
> e-mail:
> lorenzo.zamboni@gmail.com
>        
>
> lorenzo.zamboni@katamail.com
>  
> ||||||||||||||||||||||||||||||||||||||||||||
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> TRNSYS-users mailing list
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