Influence of hydrogen addition on the operating range, emissions and efficiency in lean burn natural gas engines at high specific loads

Korb, B.; Kawauchi, Satoshi; Wachtmeister, Georg

doi:10.1016/j.fuel.2015.09.080

Cited by 58 publications

(20 citation statements)

References 35 publications

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“…It indicated that brake thermal efficiency of this engine fuelled with hydrogen was approximately 2% higher than that of gasoline; however, the maximum NO x concentration of hydrogen fuel combustion was more than four times higher than that of gasoline, caused by high in-cylinder temperature. Açıkgöz et al [28] also demonstrated that hydrogen additions effectively increased the brake thermal efficiency of IC engines and decreased CO 2 , HC, and CO emissions [28], which was consistent with other researches [29][30][31].…”

Section: Introductionsupporting

confidence: 79%

Numerical simulation on the combustion and NOx emission characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen under wide open throttle conditions

Gao

Xing

Tian

et al. 2021

Fuel

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Section: Introductionsupporting

confidence: 79%

Numerical simulation on the combustion and NOx emission characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen under wide open throttle conditions

Gao

Xing

Tian

et al. 2021

Fuel

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“…The use of hydrogen enriched fuel blends, e.g. syngas, offers great potential in the decarbonisation of related technologies by substitution and expansion of the lean operating limit [3]. Decarbonisation by means of hydrogen substitution is most effective if hydrogen is produced from renewable energy sources.…”

Section: Introductionmentioning

confidence: 99%

The reactivity of hydrogen enriched turbulent flames

Hampp

Goh

Lindstedt

2020

Process Safety and Environmental Protection

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The use of hydrogen enriched fuel blends, e.g. syngas, offers great potential in the decarbonisation of gas turbine technologies by substitution and expansion of the lean operating limit. Studies assessing explosion risks or laminar flame properties of such fuels are common. However, there is a lack of experimental data that quantifies the impact of hydrogen addition on turbulent flame parameters including burning velocities and scalar fluxes. Such properties are here determined for aerodynamically stabilised flames in a back-to-burnt opposed jet configuration featuring fractal grid generated multi-scale turbulence (Re t = 314 ± 19) using binary H 2 / CH 4 and H 2 / CO fuel blends. The binary H 2 / CH 4 fuel blend is varied from α = X H2 /(X H2 + X F ) = 0.0, 0.2 and 0.4 -1.0, in steps on 0.1, and the binary H 2 / CO fuel blend from α = 0.3 -1.0 also in steps of 0.1. The equivalence ratio is adjusted between the mixture specific lower limit of local flame extinction and the upper limit of flashback. The flames are characterised using PIV measurements combined with a flame front detection algorithm. The study quantifies the impact of hydrogen enrichment on (i) turbulent burning velocity (S T ), (ii) turbulent transport and (iii) the rate of strain acting on flame fronts. Scaling relations (iv) that correlate S T with laminar flame properties are evaluated and (v) flow field data that permits validation of computational models is provided. It is shown that CH 4 results in a stronger inhibiting effect on the reaction chemistry of H 2 compared to CO, that turbulent transport and burning velocities are strongly correlated with the rate of compressive strain and that scaling relationships can provide reasonable agreement with experiments.

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“…The use of hydrogen enriched fuel blends is of increasing practical relevance due to improvements in flame stability under fuel lean conditions with corresponding benefits for reduced carbon dioxide emissions [1][2][3]. The resulting mixture reactivity also has a direct impact on flame propagation speeds and explosion over-pressures and also impacts turbulence-chemistry interactions.…”

Section: Introductionmentioning

confidence: 99%

The impact of hydrogen enrichment on the flow field evolution in turbulent explosions

Hampp

Lindstedt

2019

Combustion and Flame

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Influence of hydrogen addition on the operating range, emissions and efficiency in lean burn natural gas engines at high specific loads

Cited by 58 publications

References 35 publications

Numerical simulation on the combustion and NOx emission characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen under wide open throttle conditions

Numerical simulation on the combustion and NOx emission characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen under wide open throttle conditions

The reactivity of hydrogen enriched turbulent flames

The impact of hydrogen enrichment on the flow field evolution in turbulent explosions

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