E-fuels – a central module for future engine design?

Hentschel, Lars; Michels, Karsten; Garbe, Thomas; Hönig, Martin

doi:10.1007/978-3-658-21015-1_32

Cited by 2 publications

(2 citation statements)

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“…Due to the limitation of fossil fuels and the requirement of a sustainable mobility, fuels synthesized using renewable energy sources (or electro-fuels, e-fuels) could play a key role [4]. The e-fuel properties can be optimized to increase engine efficiency and reduce raw emissions [5]. The fuel should have a high research octane number (RON), high octane sensitivity, high heat of vaporization (HoV), and high laminar burning velocity (LBV) [6].…”

Section: Introductionmentioning

confidence: 99%

Exploring the potential of reformed-exhaust gas recirculation (R-EGR) for increased efficiency of methanol fueled SI engines

Nguyen

Sileghem

Verhelst

2019

Fuel

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Methanol is a promising fuel for spark ignition engines because of its high octane number, high octane sensitivity, high heat of vaporization and high laminar flame speed. To further boost the efficiency of methanol engines, the use of waste heat for driving fuel reforming was considered. This study explores the possibility of the reformed-exhaust gas recirculation (R-EGR) concept for increased efficiency of methanol engines. A simple Otto cycle calculation and a more detailed gas dynamic engine simulation are used to evaluate that potential. Both methodologies point to an enhancement in engine efficiency with fuel reforming compared to conventional EGR but not as much as the increase in lower heating value of the reforming product would suggest. A gas dynamic engine simulation shows a shortening of the flame development period and the combustion duration in line with the expected behavior with the hydrogen-rich reformer product gas. However, the heat loss increases with the presence of hydrogen in the reactants. The improvement of brake thermal efficiency is mainly attributed to the reduction of pumping work. The R-EGR concept is also evaluated for ethanol and iso-octane. As the reforming fraction increases, the efficiency of ethanol and iso-octane fueled engines rises faster than for the methanol engines due to a higher enhancement of exergy in their reforming products.

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Section: Introductionmentioning

confidence: 99%

Exploring the potential of reformed-exhaust gas recirculation (R-EGR) for increased efficiency of methanol fueled SI engines

Nguyen

Sileghem

Verhelst

2019

Fuel

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“…In recent years research interest in internal combustion engines has been on small volume, high performance and low fuel consumption [2][3][4][5]. Commonly used internal combustion engine cycles are four-stroke.…”

Section: Introductionmentioning

confidence: 99%

Novel Over-Expanded Six-Stroke Engine Mechanism

Arabacı

Kılıç

2018

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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Some of the exhaust waste heat of the four-stroke engines can be transformed into useful work in a variety of ways. With the exhaust heat recovery from the six-stroke engine mechanisms, the goal is to increase the thermal efficiency by converting the waste heat of useful work for the engine. Despite the availability of many patents related to six-stroke engines today more study and research are required to be used industrially. In this study, instead of a conventional six-stroke engine, a variable-stroke six-stroke engine mechanism was theoretically examined. An idealized thermodynamic model of the novel mechanism was constructed, kinetic and dynamic analyzes were made, and the design parameters were examined in comparison with the conventional engine mechanism. As a result, compared to the conventional six-stroke engine mechanism under the same conditions as this study, while the engine moment was increased by 10% , whereas the load on the crankshaft increased by only 1%.

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E-fuels – a central module for future engine design?

Cited by 2 publications

References 0 publications

Exploring the potential of reformed-exhaust gas recirculation (R-EGR) for increased efficiency of methanol fueled SI engines

Exploring the potential of reformed-exhaust gas recirculation (R-EGR) for increased efficiency of methanol fueled SI engines

Novel Over-Expanded Six-Stroke Engine Mechanism

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