[TRNSYS-users] TImebase / Timestep

[Enertech]

Dear TRNSYS Users,

I’m back to the TRNSYS List.

First of all, I would like to send a message of hope for PhD Students using 
TRNSYS : These last years I worked a lot with TRNSYS to simulate SDHW 
systems for my PhD Thesis. I finished this research work two months ago and 
I found a job thanks to TRNSYS !! In fact, Engineering Offices (in France) 
need more and more to work with dynamic simulation. TRNSYS is, of course, 
the reference ! So cheer up ! I know very well that TRNSYS is a difficult 
software to use but it can help you for your career


I’m currently working on building simulation. So I’m using TRNSYS 16 and 
TRNBUILD. I have to say this new version is very userfriendly. But, as a 
new user, I’ve got some questions.

My first question concerns the TIMEBASE and the TIMESTEP. I’ve got heavy 
walls in my building (50 cm of brick), so I’m using TIMEBASE = 2 h. My zone 
is in contact with outside and with 2 “non warming zones” (I don’t exactly 
know the english term for the french term : local non chauffé). These 2 
zones present temperatures depending on my first zone temperature and the 
outside temperature. I’ve got some convergence problems in my simulation 
with an one hour TIMESTEP. That’s why I decided to use 0.5 hour TIMESTEP 
then it works OK. Are TIMEBASE=2h and TIMESTEP=0.5h compatible ? My 
simulation results seem OK but I want to be sure


Thank you.

Christophe Plantier.
B.E.T. Enertech.
===========================
ENERTECH
F-26160 FELINES SUR RIMANDOULE
tel-fax : 04 75 90 18 54
Email : sidler at club-internet.fr
Web  : http://perso.club-internet.fr/sidler
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