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: Jun 18, 2025
If you apply some algebra to the equations you specified, they can be solved directly: m_ia = m_ar(0.009 - Woa)/(Wia-Woa) and m_oa = m_ar - m_ia T...
Unfortunately, TRNSYS 18 is not compatible with the IFX compiler. There is some coding that is no longer supported in IFX and there is no work-around ...
I can set the initial temperature for Type534 to -120 with no errors. You should send your project file and all files needed to run your project to yo...
If you want to change the initial temperature of the tank, double click on the component in your project. The proforma should open with a series of ta...
Since you can change the initial temperatures in the derivative tab it will make no difference if it is a parameter instead. The default initial tempe...
I still do not understand how this relates to needing to change initial temperature from being a derivative. That value is only used at the start of t...
Can you explain the reasoning for not wanting it as a derivative? They are just as easy to specify as parameters.
Any wall that you have entered into your building model whether it is a boundary wall or an internal wall, that mass is already included in the model....
This error indicates that your wall is too massive for the transfer functions to be correctly calculated. You can increase the timebase of the buildin...
With the Type 534-noHX model, the initial tank temperatures are set using the derivatives tab of the component proforma. There is no need to modify th...
@wsdols Please send us the tpf file so we can see why it is creating such a dck file.
The snippet you included is from a TRNSED file (*.trd) and not a deck file (*.dck). The extra comments in the file are there to define the user interf...
There was a bug in the CoolProp interface where the pressure was passed with the incorrect units. This was corrected in version 18.06.0000. You should...
In this case you will need to reach out to your TRNSYS distributor and they can manually return the license. You will need to provide the user name an...