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Lorenzo, et al.<br>
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.<br>
Kind regards,<br>
David<br><br>
At 05:16 3/16/2006, Lorenzo Zamboni wrote:<br>
<blockquote type=cite class=cite cite="">
<font face="Times New Roman, Times" size=4 color="#666666">Dear all,<br>
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.<br><br>
cordially,<br>
Lorenzo<br>
</font><font color="#666666"><br>
</font><pre>--
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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:
<a href="mailto:lorenzo.zamboni@gmail.com">lorenzo.zamboni@gmail.com</a>
<a href="mailto:lorenzo.zamboni@katamail.com">
lorenzo.zamboni@katamail.com</a>
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