Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine

The main challenge on the fueling of pure hydrogen in the automotive vehicles is the limitation in the hydrogen separation from the product of steam reforming and gasification plants and the storage issues. On the other hand, hydrogen fueling in automotive engines has resulted in uncontrolled combus...

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Main Authors:	Hagos, F. Y., A. Rashid, A. Aziz, Shaharin, A. Sulaiman, R., Mamat
Format:	Article
Language:	English
Published:	Elsevier 2019
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/18920/ http://umpir.ump.edu.my/id/eprint/18920/ http://umpir.ump.edu.my/id/eprint/18920/ http://umpir.ump.edu.my/id/eprint/18920/1/Engine%20speed%20and%20air.pdf

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recordtype	eprints
spelling	ump-189202019-06-10T01:29:12Z http://umpir.ump.edu.my/id/eprint/18920/ Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine Hagos, F. Y. A. Rashid, A. Aziz Shaharin, A. Sulaiman R., Mamat TJ Mechanical engineering and machinery The main challenge on the fueling of pure hydrogen in the automotive vehicles is the limitation in the hydrogen separation from the product of steam reforming and gasification plants and the storage issues. On the other hand, hydrogen fueling in automotive engines has resulted in uncontrolled combustion. These are some of the factors which motivated for the fueling of raw syngas instead of further chemical or physical processes. However, fueling of syngas alone in the combustion chamber has resulted in decreased power output and increased in brake specific fuel consumption. Methane augmented hydrogen rich syngas was investigated experimentally to observe the behavior of the combustion with the variation of the fuel-air mixture and engine speed of a direct-injection spark-ignition (DI SI) engine. The molar ratio of the high hydrogen syngas is 50% H2 and 50% CO composition. The amount of methane used for augmentation was 20% (V/V). The compression ratio of 14:1 gas engine operating at full throttle position (the throttle is fully opened) with the start of the injection selected to simulate the partial DI (180° before top dead center (BTDC)). The relative air-fuel ratio (λ) was set at lean mixture condition and the engine speed ranging from 1500 to 2400 revolutions per minute (rpm) with an interval of 300 rpm. The result indicated that coefficient of variation of the indicate mean effective pressure (COV of IMEP) was observed to increase with an increase with λ in all speeds. The durations of the flame development and rapid burning stages of the combustion has increased with an increase in λ. Besides, all the combustion durations are shown to be more sensitive to λ at the lowest speed as compared to the two engine speeds. Elsevier 2019-11 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/18920/1/Engine%20speed%20and%20air.pdf Hagos, F. Y. and A. Rashid, A. Aziz and Shaharin, A. Sulaiman and R., Mamat (2019) Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine. International Journal of Hydrogen Energy, 44 (1). pp. 477-486. ISSN 0360-3199 https://doi.org/10.1016/j.ijhydene.2018.02.093 https://doi.org/10.1016/j.ijhydene.2018.02.093
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Hagos, F. Y. A. Rashid, A. Aziz Shaharin, A. Sulaiman R., Mamat Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine
description	The main challenge on the fueling of pure hydrogen in the automotive vehicles is the limitation in the hydrogen separation from the product of steam reforming and gasification plants and the storage issues. On the other hand, hydrogen fueling in automotive engines has resulted in uncontrolled combustion. These are some of the factors which motivated for the fueling of raw syngas instead of further chemical or physical processes. However, fueling of syngas alone in the combustion chamber has resulted in decreased power output and increased in brake specific fuel consumption. Methane augmented hydrogen rich syngas was investigated experimentally to observe the behavior of the combustion with the variation of the fuel-air mixture and engine speed of a direct-injection spark-ignition (DI SI) engine. The molar ratio of the high hydrogen syngas is 50% H2 and 50% CO composition. The amount of methane used for augmentation was 20% (V/V). The compression ratio of 14:1 gas engine operating at full throttle position (the throttle is fully opened) with the start of the injection selected to simulate the partial DI (180° before top dead center (BTDC)). The relative air-fuel ratio (λ) was set at lean mixture condition and the engine speed ranging from 1500 to 2400 revolutions per minute (rpm) with an interval of 300 rpm. The result indicated that coefficient of variation of the indicate mean effective pressure (COV of IMEP) was observed to increase with an increase with λ in all speeds. The durations of the flame development and rapid burning stages of the combustion has increased with an increase in λ. Besides, all the combustion durations are shown to be more sensitive to λ at the lowest speed as compared to the two engine speeds.
format	Article
author	Hagos, F. Y. A. Rashid, A. Aziz Shaharin, A. Sulaiman R., Mamat
author_facet	Hagos, F. Y. A. Rashid, A. Aziz Shaharin, A. Sulaiman R., Mamat
author_sort	Hagos, F. Y.
title	Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine
title_short	Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine
title_full	Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine
title_fullStr	Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine
title_full_unstemmed	Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine
title_sort	engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in di si engine
publisher	Elsevier
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/18920/ http://umpir.ump.edu.my/id/eprint/18920/ http://umpir.ump.edu.my/id/eprint/18920/ http://umpir.ump.edu.my/id/eprint/18920/1/Engine%20speed%20and%20air.pdf
first_indexed	2023-09-18T22:27:02Z
last_indexed	2023-09-18T22:27:02Z
_version_	1777416035254665216

Engine speed and air-fuel ratio effect on the combustion of methane augmented hydrogen rich syngas in DI SI engine

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