The thermal efficiency and cost of producing hydrogen and other synthetic aircraft fuels from coal☆

Witcofski, R. D.

doi:10.1016/0360-3199(77)90090-8

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…More radical studies have already been completed; particularly on the potential for hydrogen fuelled aircraft in the late 1970s (10) and again in the 1990s as part of the European CRYOPLANE project (11) . These studies are more complex and include changes in the airframe structure to increase the available fuel volume.…”

Section: Nomenclature Fame Fatty Acid Methyl Ester Ft Fischer Tropschmentioning

confidence: 99%

Fuel effects on range versus payload for modern jet aircraft

et al. 2011

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g Gravitational constant (m/s 2 ) IFR Instrument Flight Rules LCV Lower calorific value (specific energy) (MJ/kg) L/D Lift/Drag ratio R Range (km) SPK synthetic paraffinic kerosene sfc Specific fuel consumption (mg/Ns) V flight speed (ms -1 ) W Weight (N) ρ Density (kg/m 3 ) Subscripts 0 Initial condition at start of flight cycle e empty f fuel i Section of flight cycle p payload ABSTRACTWith changes in the availability and quality of existing aviation fuels anticipated in the next 30 years it is timely to assess how changes in fuel properties would affect the range payload performance of aircraft. The effects on range and payload of a wide range of candidate fuels for aviation are investigated, including changes to the blends of conventional hydrocarbon fuels. Lighter fuels tend to be more desirable for commercial flights, where the flight is as close to the maximum payload as possible. Flights favouring range over payload are better suited by a more dense fuel. The hydrocarbon blends suggest for each aircraft, an optimum fuel may exist for the maximum payload and allowing the maximum range. Specific flight plans below the maximum range of the aircraft may be met with a lower specific energy fuel. NOMENCLATUREFAME fatty acid methyl ester FT Fischer Tropsch

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Section: Nomenclature Fame Fatty Acid Methyl Ester Ft Fischer Tropschmentioning

confidence: 99%

Fuel effects on range versus payload for modern jet aircraft

et al. 2011

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“…Should future large-scale production technology of hydrogen, based on thermochemical or electrolytic methods coupled to inexhaustible energy resources such as solar or advanced nuclear reactors materialize, then the economic viability of hydrogen as a transportation fuel vis-a-vis hydrocarbon-based fuels, will change. A recent energy balance and economic comparison of a hydrogen powered car vs. an electric car, internal combustion engine and hybrid systems, has been prepared by Exxon Research and Aircraft applications of hydrogen have also been extensively reviewed in (1), (25), (28), (34), and (35) and (40). Basic observations made regarding the use of hydrogen in ground transportation also apply for aircraft applications, though in a less severe fashion.…”

Section: Hydrogen Energy Storage Concepts For Utility Applicationsmentioning

confidence: 99%

“…greatly reduced number of storage units involved. A recent IGT report for NASA Langley Research Center (28) and (40) indicated that coal-derived hydrogen may be economically justified for future aircraft larger than the Boeing 747. Improved hydrogen production technologies, based on renewable energy resources, may make hydrogen a preferred general aviation fuel beyond the end of this century.…”

Section: (I) ---------------------------------------C/mile-----------mentioning

confidence: 99%