Initial Assessment of a Fuel Cell—Gas Turbine Hybrid Propulsion Concept

Seitz, Arne; Nickl, Markus; Troeltsch, Florian; Ebner, Kathrin

doi:10.3390/aerospace9020068

Cited by 16 publications

(8 citation statements)

References 66 publications

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“…New possibilities for the practical use of a multi-flow ejector are also considered with regard to the rotational movement of its individual parts [3][4][5]. A turbomachine [80] was considered an analog. This machine uses an option of the Segner turbine.…”

Section: Development Of Schematic Arrangement For Promising Hybrid Tu...mentioning

confidence: 99%

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Designing Mesh Turbomachinery with the Development of Euler’s Ideas and Investigating Flow Distribution Characteristics

Sazonov

Mokhov²,

Gryaznova³

et al. 2022

Civ Eng J

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This research discusses developing an Euler turbine-based hybrid mesh turbomachinery. Within the framework of mechanical engineering science, turbomachinery classification and a novel method for mesh turbomachinery design were considered. In such a turbomachine, large blades are replaced by a set of smaller blades, which are interconnected to form flow channels in a mesh structure. Previous studies (and reasoning within the framework of inductive and deductive logic) showed that the jet mesh control system allows for operation with several flows simultaneously and provides a pulsed flow regime in flow channels. This provides new opportunities for expanding the control range and reducing the thermal load on the turbomachine blades. The novel method for performance evaluation was confirmed by the calculation: the possibility of implementing pulsed cooling of blades periodically washed by a hot working gas flow (at a temperature of 1000°C) and a cold gas flow (at a temperature of 20°C) was shown. The temperature of the blade walls remained 490–525°C. New results of ongoing research are focused on creating multi-mode turbomachinery that operates in complicated conditions, e.g., in offshore gas fields. Gas energy is lost and dissipated in the throttle at the mouth of each high-pressure well. Within the framework of ongoing research, the environmentally friendly net reservoir energy of high-pressure well gas should be rationally used for operating a booster compressor station. Here, the energy consumption from an external power source can be reduced by 50%, according to preliminary estimates. Doi: 10.28991/CEJ-2022-08-11-017 Full Text: PDF

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Section: Development Of Schematic Arrangement For Promising Hybrid Tu...mentioning

confidence: 99%

“…The second engine is designed to fly at supersonic speeds. Research has intensified in the field of using hydrogen fuel [80], and detonation engines [81]. Turbine designs suitable for impulse flow [82] and energy recovery [83,84] have been analyzed.…”

Section: Introductionmentioning

confidence: 99%

Designing Mesh Turbomachinery with the Development of Euler’s Ideas and Investigating Flow Distribution Characteristics

Sazonov

Mokhov²,

Gryaznova³

et al. 2022

Civ Eng J

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“…Extensive work has been done by aerospace companies and academic institutions in the field of hybrid electric propulsion systems in the previous decade, as summarized in [1], [2], [3]. In recent years, the studies have narrowed down and focused on parallel hybrid electric configurations utilizing either lithiumbased batteries [1], [6], [7], [9], [10], [11], [12], [13], [14], [24], aluminum-based batteries [4], [8] or PEM fuel cells [5], [15]. All these technologies have similar uncertainties when integrated into aircraft platforms.…”

Section: Introductionmentioning

confidence: 99%

Integrated Hybrid Engine Cycle Design and Power Management Optimization

Ghelani,

Roumeliotis,

Saias

et al. 2024

Journal of Engineering for Gas Turbines and Power

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An integrated gas turbine cycle design and power management optimization methodology for parallel hybrid electric architectures is shown in this article. The gas turbine cycle design method is extended to both turboprop and turbofan architectures with trade studies performed initially at cycle level. It is shown that the degree of electrification is limited by the surge margin levels of booster for turbofan configuration. An aircraft mission level assessment is then performed using the integrated method initially for an A320 Neo style aircraft case. The results indicate that optimal cycle redesigned hybrid electric propulsion system (HEPS) favor take-off and climb power on-takes while optimal retrofit HEPS favor cruise power on-takes. It is shown that for current battery energy density (250 Wh/Kg), there is no fuel burn benefit. Furthermore, even for optimistic values (750 Wh/kg), the maximum fuel burn benefit for 500 nm mission is 5.5% and 4% for redesigned and retrofit HEPS, respectively. The power management strategies for HEPS configurations also differ based on gas turbine technology with improvement in gas turbine technology showing greater scope for electrification. The method is then extended to ATR 72 style aircraft case, showing greater fuel burn benefits across the flight mission envelope. The power management strategies also change depending on the objective function, and optimum strategies are reported for direct operating cost or fuel burn. Finally, a novel multi-mission approach is shown to highlight the overall fuel burn and direct operating cost benefit across the mission cluster.

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“…Furthermore, to accommodate the tanks holding cryogenic LH2, radical aircraft design changes would be required. Similarly, there would be a need for advanced propulsion concepts based on either hydrogen gas turbines, fuel cells (FCs) or hybrids thereof (Collins and McLarty, 2020;Seitz et al, 2022;McLarty et al, 2013McLarty et al, , 2014aMcLarty et al, , 2014bAzizi and Brouwer, 2018).…”

Section: Introductionmentioning

confidence: 99%

Potentials of prognostics and health management for polymer electrolyte fuel cells in aviation applications

Ebner

Koops

2022

AEAT

Self Cite

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Purpose A reliable and safe operation of fuel cells (FCs) is imperative for their application in aviation, especially within the main powertrain. Moreover, performance and lifetime requirements for technical and economic viability are demanding compared to their stationary or road transportation counterparts, while the operating conditions are considered challenging. Prognostics and health management (PHM) could represent a powerful tool for enhancing reliability, durability and performance by detecting, predicting and/or mitigating relevant degradation and failure mechanisms. Against this backdrop, the authors consider it of high relevance to obtain an understanding of the effectiveness of PHM approaches for polymer electrolyte fuel cells (PEFCs) for future aircraft applications, which represents the aim of this paper. Design/methodology/approach In this study, the authors first discuss application relevant failure modes, review state-of-the-art PHM approaches and, consecutively, assess the potential of FC control strategies for aviation. Aiming for a tangible, comparable metric for this initial assessment, the authors apply a published remaining useful life prediction method to load profiles for a range of aviation-specific applications. Findings The authors’ analysis shows significant potentials for lifetime improvement by (partial) avoidance of high power operation and rapid load change through control strategies. Tapping into these theoretical potentials, however, requires significant developments in the field of PEFC PHM and a focus on aviation specific degradation and performance testing. Originality/value The novelty of this study lies in creating an understanding of the potential of avoiding or preventing certain degradation modes by means of PHM in the PEFC specifically in aviation applications.

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Initial Assessment of a Fuel Cell—Gas Turbine Hybrid Propulsion Concept

Cited by 16 publications

References 66 publications

Designing Mesh Turbomachinery with the Development of Euler’s Ideas and Investigating Flow Distribution Characteristics

Designing Mesh Turbomachinery with the Development of Euler’s Ideas and Investigating Flow Distribution Characteristics

Integrated Hybrid Engine Cycle Design and Power Management Optimization

Potentials of prognostics and health management for polymer electrolyte fuel cells in aviation applications

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