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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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Hello everyone,
My name is Henrique, and I'm currently working on my master's thesis using TRNSYS.
I'm facing a challenge with solving a system of two equations within the simulation. Initially, I attempted to use MATLAB to solve it, but after several unsuccessful attempts to establish a connection between MATLAB and TRNSYS, I spoke with my thesis mentor and he suggested there might be a simpler way to handle the equations directly in TRNSYS.
The system of equations is as follows:
In this case, m_ar, Woa, and Wia are known values provided as inputs.
I’d appreciate any suggestions on how to solve this directly within TRNSYS or using a simple method. Thanks in advance for your help!
Best regards,
Henrique
Henrique, the TRNSYS equation solver isn't clever enough to be able to solve equations simultaneously. You will need to handle that by writing a new Type for TRNSYS. The Matlab route should work if you are familiar with coding already in Matlab; you might reach out to your distributor for help in getting TRNSYS and Matlab to communicate. Another alternative is a component that calls Python or of course you can write a Type in Fortran using the built-in TypeStudio compiler and the existing source code as a guide.
~david
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
These equations can be entered into an equation block and solved during the simulation.
