Solid Oxide Fuel Cell - Steam Reformation Power System Configuration Options for an All-Electric Commuter Airplane Flight Demonstrator

Stoia, Tina; Balan, Chellappa; Atreya, Shailesh; O’Neil, Patrick H.

doi:10.2514/6.2018-3358

Cited by 8 publications

(5 citation statements)

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“…For instance, as discussed in Ref. 3, Boeing expressed concern regarding the reliability of the foil bearing in a hot-recycle blower, noting that the anticipated operating range extended to around 900C. By including an intermediate cooler aided by a ram air intake, Boeing anticipates that the recycle blower will operate in the 150-200C range, where there is significant service history for similar foil bearing applications.…”

Section: E Mitigationsmentioning

confidence: 99%

FUELEAP Model-Based System Safety Analysis

Woodham

Graydon

Borer

et al. 2018

2018 Aviation Technology, Integration, and Operations Conference

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NASA researchers, in a partnership with Boeing, are investigating a fuel-cell powered variant of the X-57 "Maxwell" Mod-II electric propulsion aircraft, which is itself derived from a stock Tecnam P2006T. The "Fostering Ultra-Efficient Low-Emitting Aviation Power" (FUELEAP) project will replace the X-57 power subsystem with a hybrid Solid-Oxide Fuel Cell (SOFC) system to increase the potential range of the electric-propulsion aircraft while dramatically improving efficiency and emissions over stock internalcombustion engines.Our FUELEAP safety analysis faces two primary challenges. First, the Part 23 certificated Tecnam P2006T is undergoing significant modifications to host the hybrid electric-propulsion system, and the challenge is to assure that the safety inherent in the stock aircraft (and subsequently in X-57 Mod-II) is not compromised by changes in avionics, aircraft structural loading, weight and balance, or other considerations. Secondly, because the SOFC power system has little (if any) relevant in-service precedent, our challenge is to assure that we identify and mitigate all reasonably plausible hazards introduced by unique FUELEAP equipage.We are investigating and utilizing Model-Based Safety Analysis (MBSA) methods to help us address these FUELEAP safety challenges. We captured aircraft-level system hazard conditions using instances of a SysML hazard block via aircraft-level Functional Hazard Analysis (FHA). Then, using SysML models of the FUELEAP architecture, we related the hazard conditions to initiating system events and possible mitigations, such as design architecture modifications or operational constraints. We are continuing to define our approach to MBSA by developing a component-by-component inventory of local failure modes and tracing their possible contribution to hazard conditions. Finally, we are applying an argument-based approach to FUELEAP assurance. Through a FUELEAP "safety case," we are providing an explicit argument for FUELEAP safety by associating assurance evidence with overarching safety claims through a structured argument.

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Section: E Mitigationsmentioning

confidence: 99%

FUELEAP Model-Based System Safety Analysis

Woodham

Graydon

Borer

et al. 2018

2018 Aviation Technology, Integration, and Operations Conference

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“…There is a plenty of research investment exploring this technology. NASA led Fostering Ultra Efficient Low Emitting Aviation Power (FUELEAP) program focuses on development of stack technology for a 120 kW SOFC system and processing of hydrocarbon fuel [222,223]. Bauhaus Luftfahrt led AdVanced Aircraft CONcepts (AVACON) project researches on H 2 fueled PEM cell for APU application [224].…”

Section: Pmsmmentioning

confidence: 99%

A Review of Concepts, Benefits, and Challenges for Future Electrical Propulsion-Based Aircraft

2020

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Electrification of the propulsion system has opened the door to a new paradigm of propulsion system configurations and novel aircraft designs, which was never envisioned before. Despite lofty promises, the concept must overcome the design and sizing challenges to make it realizable. A suitable modeling framework is desired in order to explore the design space at the conceptual level. A greater investment in enabling technologies, and infrastructural developments, is expected to facilitate its successful application in the market. In this review paper, several scholarly articles were surveyed to get an insight into the current landscape of research endeavors and the formulated derivations related to electric aircraft developments. The barriers and the needed future technological development paths are discussed. The paper also includes detailed assessments of the implications and other needs pertaining to future technology, regulation, certification, and infrastructure developments, in order to make the next generation electric aircraft operation commercially worthy.

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“…But a compromise between thermal efficiency and weight must be made [14,15]. Borer [16] et al and Stoia [17] et al investigated hybrid systems for primary propulsive power on light commuter aircraft X-57 "Maxwell" to reduce emission and specific fuel consumption. Water [18] et al and Ji [19] et al analyzed the performance of gas turbine engines combined with bypass SOFCs.…”

Section: Sofc Gas Turbine Hybrid Systems Overviewmentioning

confidence: 99%

Analysis of Safe Operation Zone for a Turbine-Less and Solid Oxide Fuel Cell Hybrid Electric Jet Engine on Unmanned Aerial Vehicles

Ji,

Qin,

Cheng

et al. 2020

Preprint

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Solid Oxide Fuel Cell - Steam Reformation Power System Configuration Options for an All-Electric Commuter Airplane Flight Demonstrator

Cited by 8 publications

References 0 publications

FUELEAP Model-Based System Safety Analysis

FUELEAP Model-Based System Safety Analysis

A Review of Concepts, Benefits, and Challenges for Future Electrical Propulsion-Based Aircraft

Analysis of Safe Operation Zone for a Turbine-Less and Solid Oxide Fuel Cell Hybrid Electric Jet Engine on Unmanned Aerial Vehicles

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