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SYNERGIES AND TRADE-OFFS IN HYBRID PROPULSION SYSTEMS THROUGH PHYSICS-BASED ELECTRICAL COMPONENT MODELLING
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
Aristotle University of Thessaloniki, Thessaloniki, Greece.
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
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2023 (English)In: Proc. ASME Turbo Expo, American Society of Mechanical Engineers (ASME) , 2023, Vol. 1Conference paper, Published paper (Refereed)
Abstract [en]

Hybrid-electric propulsion is recognized as one of the enabling technologies for reducing aviation’s environmental impact. In this work a serial/parallel hybrid configuration of a 19-passenger commuter aircraft is investigated. Two underwing-mounted turboprop engines are connected to electrical branches via generators. One rear fuselage-mounted electrically driven ducted fan is coupled with an electric motor and respective electrical branch. A battery system completes the selected architecture. Consistency in modelling accuracy of propulsion systems is aimed for by development of an integrated framework. A multi-point synthesis scheme for the gas turbine and electric fan is combined with physics-based analytical modelling for electrical components. Influence of turbomachinery and electrical power system design points on the integrated power system is examined. An opposing trend between electrical and conventional powertrain mass is driven by electric fan design power. Power system efficiency improvements in the order of 2% favor high-power electric fan designs. A trade-off in electrical power system mass and performance arises from oversizing of electrical components for load manipulation. Branch efficiency improvements of up to 3% imply potential to achieve battery mass reduction due to fewer transmission losses in mission-significant segments. A threshold system voltage of 1kV, yielding 32% mass reduction of electrical branches and performance improvements of 1-2%, is defined. Above the indicated threshold, benefits are limited, and system design complexity increases unfavorably. This work sets the foundation for interpreting mission-level electrification outcomes that are driven by interactions on the integrated power system. Areas of conflicting interests and synergistic opportunities are highlighted for optimal conceptual design of hybrid powertrains.

Place, publisher, year, edition, pages
American Society of Mechanical Engineers (ASME) , 2023. Vol. 1
Keywords [en]
Conceptual design, Economic and social effects, Efficiency, Electric loads, Environmental impact, Environmental technology, Machine design, Systems analysis, Efficiency improvement, Electric fans, Electrical components, Electrical power system, Fan designs, Integrated Power Systems, Mass reduction, Performance, Physics-based, Trade off, Electric power transmission
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-64858DOI: 10.1015/gt2023-102211ISI: 001215540100019Scopus ID: 2-s2.0-85177470762ISBN: 9780791886939 (print)OAI: oai:DiVA.org:mdh-64858DiVA, id: diva2:1815482
Conference
Proceedings of the ASME Turbo Expo, Boston, MA, June 26-30, 2023
Available from: 2023-11-29 Created: 2023-11-29 Last updated: 2024-06-05Bibliographically approved

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Bermperis, DimitiosKavvalos, MavroudisVouros, StavrosKyprianidis, Konstantinos

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