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Comparison of Concepts: Classic Jet Propulsion, Turbo-Electric Propulsion and Turbo-Hydraulic Propulsion

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Comparison of Concepts: Classic Jet Propulsion, Turbo-Electric Propulsion and Turbo-Hydraulic Propulsion ( comparison-concepts-classic-jet-propulsion-turbo-electric-pr )

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92 III. Research Context The target to reduce carbon emissions while maintaining the drastic growth in air transport in- creases the need of improving the existing propulsion systems. With a regular increase in oil price, the operating costs for airlines tend to go up and airlines take the effort to reduce them. Extensive research into advanced propulsion technologies and advanced aircraft configura- tions can lead to fuel savings, cost reductions and less environmental impact. A sustainable aviation transport system is the final goal. This thesis is a continuation to the work of Prof. Scholz who has worked on the evaluation of electric and hybrid propulsion, aircraft design and simple turbofan models for aircraft design optimization. This thesis is one in a string of student contributions to evaluate new propulsion concepts in aircraft design. Figure 6 Different hybrid and turbo-electric engine concepts (NAS 2016) The turbo-electric concept (Figure 1) seems to lead the discussion about new electric propul- sion concepts for passenger aircraft. This is due to the fact that batteries would be too heavy for any reasonable range of passenger aircraft – now and in the future. After all, the specific energy (measured in Wh/kg) of kerosene is orders of magnitude higher than that of batteries and hydraulic accumulators.

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