Characterisation of thermal management system specific heat rejection for electric propulsion architectures

Kurzfassung

A thermal management system (TMS) is required to manage the heat loads of aircraft electric powertrain components. The specific heat rejection is used to describe the mass penalty of the TMS. A liquid cooled generic TMS architecture is defined with its components either modelled analytically or based on empirical scaling expressions. The TMS specific heat rejection is evaluated across various input parameters such as the heat flow, the fluid temperatures and the pipe dimensions. As a result trade-off options can be identified to reduced the overall system mass and are used to define design recommendations for TMSs to increase the specific heat rejection.