Conclusion

As demonstrated in this tutorial, Modelon Impact is well suited to solving flow balancing problems in steady-state using the built-in Physics-based Solver (PbS). The system model demonstrated makes numerous simplifications and assumptions, with the focus being on solving the flow balancing problem. Multi-run experiments were used to perform sensitivity analyses on certain design parameters in the TMS including design flow rates and pump pressure. In practice, there are many other factors to be taken into consideration when designing a TMS in an aircraft (in particular, those with a hybrid-electric propulsion system). As there exists a strong dependency between the TMS and EPS system designs and more advanced models should be considered in practice for the design which considers a range of other aspects such as:

• Coupled system models of the EPS and the TMS for dimensioning - see Electrification Library for more detailed modelling of electrical components.
• Heat transfer interfacing between the electrical components and the coolant, (i.e. cold plates).
• Thermal inertia of electrical components in the system.
• Weight constraints of the aircraft and weight contributions encountered from dimensioning of the TMS and EPS.  

This example is also outlined in a paper with more information found under the conference paper by Coic et. al (2022) "Solving Flow Balancing Problems for Hybrid-Electric Aircraft Cooling Systems" submitted to the Asian Modelica Conference