Modelling of a Hybrid-Electric Light Aircraft

Frosina, Emma; Caputo, C.; Marinaro, Gianluca; Senatore, Adolfo; Pascarella, Ciro; Lorenzo, Giuseppe Di

doi:10.1016/j.egypro.2017.08.315

Cited by 18 publications

(17 citation statements)

References 4 publications

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“…Various electric aircraft designs have been investigated [6,[45][46][47][48][49][50], either dealing with the conversion of existing fuel-powered aircrafts to all-electric or hybrid aircrafts, or with the development of totally new aircraft designs. However, many electric aircraft designs rely on substituting the fuel-powered propulsion system by an electrical one using, for example, (heavy) conventional batteries.…”

Section: General and Aerospace-specific Potentials Of Structural Enermentioning

confidence: 99%

Multifunctional Composites for Future Energy Storage in Aerospace Structures

et al. 2018

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Multifunctionalization of fiber-reinforced composites, especially by adding energy storage capabilities, is a promising approach to realize lightweight structural energy storages for future transport vehicles. Compared to conventional energy storage systems, energy density can be increased by reducing parasitic masses of non-energy-storing components and by benefitting from the composite meso-and microarchitectures. In this paper, the most relevant existing approaches towards multifunctional energy storages are reviewed and subdivided into five groups by distinguishing their degree of integration and their scale of multifunctionalization. By introducing a modified range equation for battery-powered electric aircrafts, possible range extensions enabled by multifunctionalization are estimated. Furthermore, general and aerospace specific potentials of multifunctional energy storages are discussed. Representing an intermediate degree of structural integration, experimental results for a multifunctional energy-storing glass fiber-reinforced composite based on the ceramic electrolyte Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 are presented. Cyclic voltammetry tests are used to characterize the double-layer behavior combined with galvanostatic charge-discharge measurements for capacitance calculation. The capacitance is observed to be unchanged after 1500 charge-discharge cycles revealing a promising potential for future applications. Furthermore, the mechanical properties are assessed by means of four-point bending and tensile tests. Additionally, the influence of mechanical loads on the electrical properties is also investigated, demonstrating the storage stability of the composites.

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Section: General and Aerospace-specific Potentials Of Structural Enermentioning

confidence: 99%

Multifunctional Composites for Future Energy Storage in Aerospace Structures

et al. 2018

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“…The calculations with Engine_3 have been made (Figure 17) in the only case of minimum fuel consumption mode in cruise phase (Figure 18), avoiding a wide increase of TIT temperature, not acceptable for turbine blades. As is possible to observe, the degree of hybridization for energy, defined in (6), is equal to 30% higher than the value obtained with Engine2_SFCmin, equal to 2.3%. This implies a natural reduction of CO2 and NOx emissions, as underlined in Table 5.…”

Section: Configuration With Engine_3mentioning

confidence: 64%

“…In contrast, this hybrid configuration requires an energy significantly higher from the electric system and, consequently, an excessive weight of the batteries on board that makes this configuration not acceptable in the current aircraft arrangement. As is possible to observe, the degree of hybridization for energy, defined in (6), is equal to 30% higher than the value obtained with Engine2_SFCmin, equal to 2.3%. This implies a natural reduction of CO 2 and NO x emissions, as underlined in Table 5.…”

Section: Configuration With Engine_3mentioning

confidence: 64%

“…The optimization problems (4)- (6) have been solved using a random search method. This choice is due to the fact that two of the three independent variables must be integer numbers.…”

Section: Solutions Of the Optimization Problemmentioning

confidence: 99%

“…This research is placed in a scientific context that is increasingly of interest in the last years. In fact, many companies and researchers in the scientific community are investigating new configurations of hybrid propulsion for aircraft [5,6]. In the paper [7], the authors examine the state-of-the-art of hybrid electric propulsion system modeling, and suggest new methodologies for sizing such advanced concepts.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Investigation of a Turboprop Hybrid Electric Propulsion System

et al. 2018

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Hybrid electric propulsion in the aviation field is becoming an effective alternative propulsion technology with potential advantages, including fuel savings, lower pollution, and reduced noise emission. On the one hand, the aeroengine manufacturers are working to improve fuel consumption and reduce pollutant emissions with new combustion systems; on the other hand, much attention is given to reducing the weight of the batteries increasing the energy density. Hybrid electric propulsion systems (HEPS) can take advantage of the synergy between two technologies by utilizing both internal combustion engines (ICEs) and electric motors (EMs) together, each operating at their respective optimum conditions. In the present work, some numerical investigations were carried out by using a zero-dimensional code able to simulate the flight mission of a turboprop aircraft, comparing fuel consumption and pollutant emissions of the original engine with other two smaller gas turbines working in hybrid configuration. An algorithm has been implemented to calculate the weight of the batteries for the different configurations examined, evaluating the feasibility of the hybrid propulsion system in terms of number of non-revenue passengers.

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Investigation of exergetic and exergo‐sustainability metrics for high by‐pass turbofan engine at different power settings

Aygün

2021

Env Prog and Sustain Energy

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This paper investigates influences of several throttle settings on several exergetic and exergo-sustainability parameters by employing thermodynamic principles for high by-pass turbofan engine as named PW4000 engine. First, energy efficiency of the PW4000 is found to vary between 9.77% and 37.69% due to rising from 5544 RPM to 9169 RPM. Considering exergetic results on component basis, rising power setting leads to increase exergy efficiency of the components. Also, the combustor of PW4000 belongs to lowest exergy efficiency throughout 19 RPMs. Namely, exergy efficiency of the combustor increases from 69.14% to 86.31% whereas that of LPT raises from 92.01% to 93.25% owing to the increase in RPM. Considering sustainability parameters for whole engine, exergy efficiency of PW4000 varies from 9.13% to 35.26% whereas its exergetic sustainability index increases from 0.276 to 1.238 throughout RPM values. Furthermore, environmental effect factor of PW4000 decreases from 3.26 to 0.807 due to rising RPM value. According to these results, it is revealed that there are generally nonlinear relationship between thermodynamic parameters and power settings. To measure exergetic metrics of turbofan engines for different running points can allow researchers to find optimum RPM value of the engine in terms of thermodynamic sustainability.

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Modelling of a Hybrid-Electric Light Aircraft

Cited by 18 publications

References 4 publications

Multifunctional Composites for Future Energy Storage in Aerospace Structures

Multifunctional Composites for Future Energy Storage in Aerospace Structures

Modeling and Investigation of a Turboprop Hybrid Electric Propulsion System

Investigation of exergetic and exergo‐sustainability metrics for high by‐pass turbofan engine at different power settings

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