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.
Some tips for success on using the forum:
- Follow the Forum Rules posted in Forum Administration.
- There are categories for different types of topics and questions. Post your topic or question into the proper category.
- Before posting a topic or question search the existing topics (and the TRNSYS Users listserv archive or Post archive) to see if a similar topic or question has already been answered.
- Use a descriptive topic name. Don’t use attention getting subjects, they don’t get attention and only annoy people.
- State the version of TRNSYS and which add-ons your are using.
- Include enough specific details for your topic of question to be answered. Just posting “Why am I getting an error?” without describing the specific error and what you are trying to do when you get the error will not receive a response that fixes your issue.
- Remember when people help you, they are doing you a favor. Be patient, help people out by posting good descriptions of what you need help with, and be polite even if a response does not solve your issue.
- Moderators may edit your post for clarity or move your topic to a more appropriate category.
Last seen: May 25, 2026
Hi Ken, I will walk you through my troubleshooting process: I ran the example 'SDHW' using TRNSYS version 18.05.0001 and confirmed that EtaColl_d ...
Hi Ken, Try Type 150 - Delayed Inputs. You should find it in the standard TRNSYS Controllers library.
Ali, The rock bed storage model is more similar to a tank model than it is to a ground storage model. As such, it does not have boundary conditions ...
unfortunately no one can tell if a simulation is 'right' or 'wrong' based on a picture of the connections. Equation and variable definitions, file loc...
Hello Damian, Trial and error can be a valuable part of the TRNSYS learning experience! That said, there are a couple of guidelines you can use to f...
Hello Toni, I think your .dck file got corrupted somehow. If you look on line 4601 (about a dozen lines below the line **BEGIN type888.ddck), you'll...
@tonicalabrese It might help to copy and paste the .dck or .log file as a comment or as a reply on this post. I have seen other users do that, in orde...
Pages 4-393 and 4-394 of the Mathematical Reference volume of the documentation (in the Documentation folder of your main TRNSYS directory) cover the ...
@ken There are two variations on a tubular integrated collector storage (ICS) model in the TESS Solar Component Library. You can read about the TESS c...
@ken There are horizontal storage tanks in the TESS Storage Tank Component Library. You can read about the TESS component library packages and downloa...
@yuri_h The model is available for purchase as an individual component of the TESS libraries. Contact your TRNSYS distributor to order it as an indivi...
@alexa What does your equation block look like? I'm expecting it to look something like the following, where "Windspeed" is the value connected from y...
@alexa It also looks like you're trying to use Type15 to read 'turbina.txt'. Type15-2 is only for reading weather data files in the TMY-2 format, a ve...
Ah! Now we're getting somewhere! The errors are all telling you that there's something wrong in your "Equa" equation block, specifically with th...