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Integrated optimal design of a hybrid-electric aircraft powertrain

Pettes-Duler, Matthieu. Integrated optimal design of a hybrid-electric aircraft powertrain. PhD, Génie Electrique, Institut National Polytechnique de Toulouse, 2021

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In 2019, transportation was the fastest growing sector, contributing to environmental degradation. Finding sustainable solutions that pollute less is a key element in solving this problem, particularly for the aviation sector, which accounts for around 2% of global CO2 emissions. With the advent of Covid-19, air traffic seems to have come to a fairly permanent halt, but this pandemic reinforces the need to move towards a "cleaner sky" and respect for the environment, which is the objective of the Clean Sky2 program (H2020 EU), the context in which the HASTECS project and our thesis are set. The main objective of HASTECS (Hybrid Aircraft Academic reSearch on Thermal and Electrical Components and Systems) is to couple thermal and electrical studies within the hybrid electric propulsion chain of a regional aircraft, by integrating the environmental constraints (in particular partial discharges) specific to the aviation sector. The aim is to identify the most promising technologies and breakthroughs and to develop the tools that will significantly increase the compactness and efficiency of the electrical processes within the hybrid propulsion chain. In our case, only series hybrid electric architecture was studied in this project, as it leads to a high dimensioning power maximizing the technological constraints on the chain. The technological targets set in HASTECS, considered under two horizons (2025 then 2035), are the following: Electric motor + cooling system Specific power : 5kW/kg - 10kW/kg Cruise efficiency : 96% - 98.5% Maximal design point efficiency : 94.5% - 97% Power electronics + cooling system Specific power : 15kW/kg - 25kW/kg Cruise efficiency : 98% - 99.5% Maximal design point efficiency : 96.5% - 99% In the framework of this project, our thesis aims at the design by optimization of the complete propulsion chain integrating in particular the models resulting from the technological developments of the major components (power electronics, wiring and distribution architecture, actuation) while considering, from a simplified energy management, the hybridization of a main (thermal) and auxiliary (electrical) source. A first objective of our thesis concerned the development of an environment model. Once these conditions are set, the system integration consists in building a suite of scale models whose granularity allows the global (systemic) evaluation of the energy yields and masses of each component up to the complete propulsion chain. The propulsion system is designed via an iterative process estimating, according to the design choices, the mass

Item Type:PhD Thesis
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Laboratory name:
Research Director:
Roboam, Xavier and Sareni, Bruno
Deposited On:01 Oct 2021 12:19

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