Welcome to the TRNSYS Users Forum.
The forum is a place where people can interact and have discussions about different topics involving the use of the TRNSYS software package. Here you can post topics for discussion or questions on using TRNSYS and get advice from other users or TRNSYS experts. This forum is not intended for detailed technical support. Users should contact their distributor’s hotline for such assistance.
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Last seen: May 25, 2026
@tobiaaas, I think that might be a typo in the 10-Examples.pdf that suggests inverter mode 0 pairs with battery mode 1. I don't think there's a c...
Hello @tobiaaas, I am not sure why the battery doesn't discharge in your simulation. Have you looked at the example WindDieselPV.tpf (in the Example...
Hello @shamsoddinghiami, 1) You can use either Type 997 or Type 999. Type 999 will run slower, but allows you to have multiple instances of Type...
Hello @juche, Sounds like you want Type 1505, Event Counter, which is part of the TESS Controllers library of components. The output of Type 1505 wi...
Sam, There was a bug in an older version of TRNSYS that caused Type 49 to error, even when there was only one instance of the Type in the simulation...
@the-mechanix Thank you for the extra clarification! It helps a lot to know what changed in the project immediately before the error occurred. Can you...
@manaya_ Your English is very good! I think I understand the question you are asking, but if not, please let me know! I assume you are trying to s...
@ken What we typically do when we tune parameters to match measured data is calculate a cost function at each time step in an equation block, for exam...
I can't say for sure from the information given, but if you haven't edited the .dck file directly my guess is you're using a specified-format version ...
@gehadrabee24 You can read about writing and compiling your own TRNSYS Type in the ProgrammersGuide.pdf, which is in the Documentation folder of your ...
@ken Sorry, I didn't mean to imply that the thermosiphon pump had been available in the past - to the best of my knowledge it's never been part of the...
@ken I think David is suggesting that, in the Fortran code, the value f is calculated first as either 64/Re or 0.032, then it is further modified by t...
@mohammad-alrbai For a very simple/basic steam generator model, you could just insert something in an equation block like: mdot_steam = efficienc...
@ken We've modeled these systems in the past using a flat-plate collector from the TESS library (Type 1346 or similar, depending on the parameters pro...