[TRNSYS-users] tank and glycol.

[Sancho,Fernando]

 Dear Trnsys-users,

Im using Type 60 as a Tank  and have a convergence problem with the solar heat exchanger just when I use glycol in it. 

error non convergences for Hx 1. Final UAHx value = 345.adjfhadgfg

That is a reported problem in the list, the solutions indicated were normally  about "adding pipes in the solar loops", to be sure that   in a certain time step  a portion of fluid is not going in and out the pump or similar problems. Or decresing  the internal time steps of the tank.
I tried a wide rate of values for both variables  but it didn´t work. And that happens just not always in the same time step, it depends on the limit of my simulation, i find that strange as well. 
So i´m getting into the "physics behind" during the weekend, but ...hat anyone any advice?

And, about the same situation , with water in der solar loop everything runs with no problems...but can someone explains to me how  deals TRNSYS with a freezed fluid in the collector?

Thanks a lot!!! Enjoy the weekend
(David, thank you, I added my new type succesfully after testing)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20101112/bfa2b626/attachment-0001.htm>