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
@tm-abir-ahsan and @meiling_J The TRNSYS built-in compiler (TypeStudio) doesn't provide guidance on writing TRNSYS code; it only compiles Fortran co...
Ken, 1) If you want to use Type 41 to do this, I would first build the eight daily profiles you want (weekday winter, weekend winter, weekday spring...
@tm-abir-ahsan If you open the wizard for Type 548b (when you open the proforma, it's the magic wand icon in the lower left) and navigate to the Boreh...
Ah, I see the problem. What I would try next is changing the conditional to check if the outlet temperature > inlet temperature by some nominal amo...
Fprime_function is the function Type 1 calls to calculate the collector efficiency factor from the given efficiency equation coefficients. The functio...
I wouldn't recommend trying to call a Type from within another Type. It sounds like you can make all the connections you described externally - just m...
@meiling_J There's no built-in TRNSYS subroutine for simultaneous solution of multiple differential equations. There might be something in Intel's Mat...
@tm-abir-ahsan If your concrete floor is a massive surface (which it should be by default), then no, you do not need to add the concrete floor capacit...
@ken 1) It sounds like you want to create a variable in an equation block, which you can then use in multiple places in your project. In Simulatio...
@meiling_j Where is your initial value for tbar coming from? It is used on lines 2, 3, and 6 of your code, but it isn't defined until the second to la...
@meiling_j I noticed on line 1 you're using slot 2 in the dynamic storage array to read in ai, but on line 5 you're setting af to slot 1 of the dynami...
Ah, that helps! 'updateReportValue' is not a valid Simulation Summary Report (SSR) command. Only 'updateReportMinMax' and 'updateReportIntegral' may...
@meiling_j Can you include the source code from your Type as part of your post? (Edit the post -> Click on the "<>"symbol in the tool bar -&...
@hilcontroller I used 64-bit TRNSYS, version 18.04.0000.
Hello, You didn't indicate which version of TRNSYS or the TESS libraries you are using? All of the tank models were updated with TESSLibs18, and Typ...