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: Sep 15, 2026
@chushunzhou I think you may just have to click on the name of the NTYPE that you have selected in the list in the lower left hand side of the windo...
@gasperbrunskole Gašper, any of the tank models that have mentioned been mentioned in this thread will work for your application. Type158 would be a...
@mastah You are correct that both the Base Toolkit and the HPC Toolkit are required.
@rodrigo There are a few radiator components available in the TESS HVAC library. I would try Type1231 and I would put one in each room that the syste...
@rodrigo yes, that is the correct procedure. If printing/scanning is a pain, you can just send an email with the pertinent information to techsupport@...
@mastah as a side note, we are working on updating the TRNSYS coding so that future versions will be compatible with the IFX compiler.
@gehadrabee24 It sounds as though you changed the Type534 proforma so as to redesignate one or more derivatives as parameters. There are two ways to r...
@srhayri additionally, you can treat the layer as though it were only resistive rather than having thermal mass. You can then account for the thermal...
Type1531 and 957 are both TESS components. You can contact the developer by emailing techsupport@tess-inc.com. Type1531 was written for Trnsys v18....
@gehadrabee24 I am not sure I understand your question. To set the initial temperature of the tank you open the tank model's proforma, switch to the "...
@danalee Dana, there are two ways that TRACE can be used. The simple way is to select the component whose inputs outputs, and parameters you want t...
@alish this is one of the stranger errors I have run into. My colleagues and I have run the project on a few different computers using exactly the ve...
@danalee The error would suggest that TRNSYS is sending a set of inputs to your *.m code that Matlab cannot solve. You might try adding a TRACE to you...
@alish Ali, it was probably me who suggested that over at techsupport! I'm sorry it didn't solve the problem. Are you just dragging out a Type33 (c or...
@soufiane_ze I am not aware of any freely available components. The TESS component is available at