Liquid hydrogen—an alternative aviation fuel?☆

Price, R.O.

doi:10.1016/0360-3199(91)90155-c

Cited by 25 publications

(5 citation statements)

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“…N. Veziroglu and F. Barbir [37] compared the hydrogen with conventional and unconventional fuels, and concluded that hydrogen has the best characteristic and Robert O. Price [56] explained the potential of liquid hydrogen relative to conventional jet fuel. Edwards [57] described the composition and selected properties of kerosene fuel for use in aerospace application.…”

Section: Alternate Fuels and Fuel Propertiesmentioning

confidence: 99%

Evolving base for the fuel consumption optimization in Indian air transport: application of structural equation modeling

Singh¹,

Sharma

2014

Eur. Transp. Res. Rev.

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Introduction The article aims to evolve the base for fuel consumption optimization (FCO) in Indian air transport industry. The objective of this paper is to design the methodology and to develop five facet model of fuel consumption optimization (FCO). Limited researches have been conducted to explore influencing factors for FCO in air transport industry. To fill this gap, this study proposes the model of FCO, and investigates key factors affecting FCO. Methodology The research steps included exploratory factor analysis, confirmatory factor analysis, and testing of structural model. In the first stage exploratory factor analysis (EFA) was used to provide the grouping of variables underline the complete set of item based upon the strong correlation. In the second stage, a confirmatory factor analysis (CFA) was used to specify and estimate of one or more hypothetical models of factor structure, each of which propose a set of latent variables to account for covariance within a set of observed variables. In the third stage, we used the Structural Equation Modeling (SEM) technique and empirically tested the relationships between fuel consumption optimization and aircraft operations Conclusions and future work This study has provided empirical justification for the proposed research framework which describes the relationships between FCO and its dimensions. This has developed an integrated model of FCO, with the purposes of identifying the key factors affecting the FCO. The knowledge of relationship among variables can lead to frame objective function, constraints, and set of equations pertaining situations with regard to Indian scenario. To constitute the equations the data of identified critical factors with regard to Indian scenario can be utilized which will lead to develop optimization based model for fuel consumption that leaves the scope for further study. This study produces the results which represent the base for optimum solution of fuel consumption on which future researchers can target.

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Section: Alternate Fuels and Fuel Propertiesmentioning

confidence: 99%

Evolving base for the fuel consumption optimization in Indian air transport: application of structural equation modeling

Singh¹,

Sharma

2014

Eur. Transp. Res. Rev.

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“…The NASA project was to have two spherical tanks for hydrogen, in order to reduce the surface to volume ratio. It was designed for 400 passengers, at a cruise speed of Mach 0.85 and a range of 5500 nautical miles 12 . 5 In 1998, the Army After Next (AAN) annual report states, "An absolute imperative exists to develop alternative fuels for AAN-era forces."…”

Section: Historical Review Of Hydrogen Aircraftmentioning

confidence: 99%

A Review of Hydrogen as a Fuel for Future Air Transport

Khandelwal¹,

Sekaran²,

Karakurt³

et al. 2012

48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Innovations in propulsion system have been the key driver for the progress in air transportation and it is expected to grow at a rapid pace. This incurs challenges in aircraft noise reduction and regulation of hazardous emissions. This paper address the issues associated to reduction in hazardous emissions by investigating the properties and traits of hydrogen. Hydrogen as a fuel is most likely to be the energy carrier for the future of aviation due to its potential zero emissions. A historical review has been carried out on hydrogen usage in aerospace industry till today. The challenges of using hydrogen as a fuel for aero applications have been laid down. The paper also shows various strategies analyzed in order to evaluate hydrogen's feasibility which includes production, storage, engine configurations and aircraft configurations. NomenclatureAAN = army after next CH 4 = methane CO = carbon-monoxide CO 2 = carbon-dioxide GE = general electric GH 2 = gaseous hydrogen GWP = global warming potential HALE = high altitude long endurance H 2 O = water LDI = lean direct injection LH 2 = liquid hydrogen MLI = multi layer insulation NO x = oxides of nitrogen O 3 = ozone UAV = unmanned aerial vehicle UHC = unburned hydrocarbonsI. Introduction ccording to the leading experts the aviation industry is expected to grow continuously, at a rapid pace in the coming few decades. Commercial sectors are projected to increase in the order of 5% and more than that for cargo transportation, despite the downturn in the current world economy

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“…14,15 The implementation of cryogenic fuel cooling is expected to improve efficiency slightly, with a 40% to 50% reduction in heating value compared to conventional engines. 5 The current research on hydrogen use in aircraft mainly comprises theoretical studies, [16][17][18][19][20][21][22][23][24] with notable flight tests conducted to evaluate practical applications. These tests featured a B-57 airplane 25 and an experimental Tupolev Tu-155 aircraft.…”

Section: Introductionmentioning

confidence: 99%

Effects of using hydrogen on the exergetic and environmental damage performance of an UAV turbojet engine

Yucer,

Nacakli

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, the performance effects of using hydrogen instead of JP-8 fuel in an unmanned aerial vehicle (UAV) jet engine was investigated. Exergy analysis and environmental damage analysis were used to obtain performance parameters. These performance parameters were exergy destruction ratio, thrust-specific fuel consumption, air-to-fuel ratio, exergy efficiency, waste exergy ratio, environmental effect factor, sustainability index, and exergetic improvement potential values. Turbojet engine was operated at three different throttle settings (50%, 75%, and 100%) to examine the impact of different load types on the performance parameters. The results obtained by using JP-8 and hydrogen fuels at different throttle settings showed consistency. For all throttle settings, the highest exergy efficiencies took place in the nozzle as approximately 90%. On the other hand, the combustion chamber had the lowest exergy efficiencies for all conditions and took values between 30% and 40%. Calculated exergy destruction ratios indicated that the hydrogen use improved or saved the jet engine’s energy performance. Except the combustion chamber, compressor, turbine, and nozzle exergy destruction ratios decreased as 6.2%, 6.5%, and 10.8%, respectively. Moreover, the use of hydrogen fuel did not significantly change the performance parameters, in fact reduced the environmental impact approximately 113%. The findings indicated the potential benefits of hydrogen fuel use when compared to JP-8 fuel.

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Liquid hydrogen—an alternative aviation fuel?☆

Cited by 25 publications

References 0 publications

Evolving base for the fuel consumption optimization in Indian air transport: application of structural equation modeling

Evolving base for the fuel consumption optimization in Indian air transport: application of structural equation modeling

A Review of Hydrogen as a Fuel for Future Air Transport

Effects of using hydrogen on the exergetic and environmental damage performance of an UAV turbojet engine

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