Joule-Brayton Process with Dry Air

• Using a more realistic medium:
  • Dry Air = ideal gas with non-constant heat capacity c_p(T)
    • defined in MSL media library as DryAirNasa
  • simply changing medium → model doesn't run
    • inversion of h(T) with Dekker-Brent has wrong start interval
• Problems with DryAirNasa:
  • function for isentropic enthalpy uses constant c_p approximation
    • provide better computation directly using constant entropy
  • compressor characteristics in ThermoDLR uses constant c_p
    • change that as well
  • inversion still gets wrong start interval
    • problem: mass flow is zero initially
    • use given mass flow as start value → model runs
• Finetuning:
  • large deviations from expected results
  • use procedure from Joule example above, including simple test models
  • internal inversions make model less stable
    
    • fix: define ω instead of τ for compressor
  • then closing circle and standard finetuning work