### Problems and Challenges

- Special components necessary:
- cylinder model = volume with a mechanical flange
- compressor uses constant c
_{p}
- instead use constant entropy with c
_{p}(T)
- needs inversion of nonlinear function

- turbine using water (TFS-Lib turbine only uses ideal gas)

- Parameter Tuning:
- reverse logic
- p, T,
given
- compressor, turbine and heater parameters needed

- arbitrary guess values → "Failed to solve nonlinear system"
- solution methods
- use turbine equations to compute ω or τ manually
- start with smaller state changes
- use known state values as initial values

- model runs at least for a short time
- → apply parameter changes and monitor results
- → final values can be reached

- more details in
- "Implementing Thermodynamic Cyclic Processes
Using the DLR Thermofluid Stream Library",

SNE 33/4 (2023), 175-182.