CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy

The dependence on fossil based liquid fuels for the transport sector has resulted in severe punishment on the environment. On the other hand, natural reserve of liquid petroleum is depleting at an alarming rate. even though there are efforts to move from combustion-based engines to electric vehicles...

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Main Authors:	Ngu, Tai Tieng, Hagos, F. Y., A. Rashid, A. Aziz, R., Mamat
Format:	Conference or Workshop Item
Language:	English English
Published:	2018
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/19589/ http://umpir.ump.edu.my/id/eprint/19589/1/4.%20CFD%20modelling%20of%20combustion%20of%20cng%20and%20hydrogen.pdf http://umpir.ump.edu.my/id/eprint/19589/2/4.1%20CFD%20modelling%20of%20combustion%20of%20cng%20and%20hydrogen.pdf

id	ump-19589
recordtype	eprints
spelling	ump-195892018-11-12T07:10:47Z http://umpir.ump.edu.my/id/eprint/19589/ CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy Ngu, Tai Tieng Hagos, F. Y. A. Rashid, A. Aziz R., Mamat TJ Mechanical engineering and machinery The dependence on fossil based liquid fuels for the transport sector has resulted in severe punishment on the environment. On the other hand, natural reserve of liquid petroleum is depleting at an alarming rate. even though there are efforts to move from combustion-based engines to electric vehicles, the transition needs time and resource. Countries have adopted natural gas as an alternative fuel particularly for the public transport such as buses and taxi. However, the combustion process of CNG is associated to instability and lower performance at low-load and low-speed and higher temperature that can damage engine hardware at highload and high-speed applications. Researchers have used inline steam reformers of CNG for the generation of hydrogen in Fuel cell vehicles. However, the requirement of complex separation process and issues related to production cost, the technologies could not be widely commercialized. On the other hand, the syngas production is simple and cheaper as compared to hydrogen production and it uses an existing engine in dual fueling mode with little modification. The objective of this work is to model the combustion of CNG and syngas in dual fueling strategy for the combustion stability and performance enhancement of a CNG engine. A single-cylinder, four-stroke spark ignition engine with a compression ratio of 14:1 is used in the current work. The engine is operated at 1200 rpm at idle condition (no load). The fuel injection timing for syngas is considered at 300o BTDC while 120o BTDC for CNG. The ignition timing is considered at 32o BTDC. The modeling work include a cold flow, combustion and comparison of the combustion parameters of base-line CNG data with that of CNG-Syngas dual fuel. A dual fuel strategy is modeled as its geometry. The CFD model was validated by using an experimental result from the engine at 1200 rpm with no load condition fueled with CNG. Addition of syngas into CNG fuel has increased the burning temperature there by the peak pressure. The thermal efficiency of the engine is improved. Syngas is inducted to the air induction system for enrichment in CNG-syngas dual fueling operation in the current CFD modelling work. Syngas-enrichment in CNG-fueling has improved combustion stability and the combustion efficiency. This is attributed to the higher laminar speed of hydrogen in the syngas. 2018-05 Conference or Workshop Item NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/19589/1/4.%20CFD%20modelling%20of%20combustion%20of%20cng%20and%20hydrogen.pdf pdf en http://umpir.ump.edu.my/id/eprint/19589/2/4.1%20CFD%20modelling%20of%20combustion%20of%20cng%20and%20hydrogen.pdf Ngu, Tai Tieng and Hagos, F. Y. and A. Rashid, A. Aziz and R., Mamat (2018) CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy. In: 5th International Conference on Nanotechnology, Nanomaterials & Thin Films for Energy Applications, 18 - 20 Julai 2018 , University of Aveiro, Portugal. pp. 1-19.. (Unpublished)
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Ngu, Tai Tieng Hagos, F. Y. A. Rashid, A. Aziz R., Mamat CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy
description	The dependence on fossil based liquid fuels for the transport sector has resulted in severe punishment on the environment. On the other hand, natural reserve of liquid petroleum is depleting at an alarming rate. even though there are efforts to move from combustion-based engines to electric vehicles, the transition needs time and resource. Countries have adopted natural gas as an alternative fuel particularly for the public transport such as buses and taxi. However, the combustion process of CNG is associated to instability and lower performance at low-load and low-speed and higher temperature that can damage engine hardware at highload and high-speed applications. Researchers have used inline steam reformers of CNG for the generation of hydrogen in Fuel cell vehicles. However, the requirement of complex separation process and issues related to production cost, the technologies could not be widely commercialized. On the other hand, the syngas production is simple and cheaper as compared to hydrogen production and it uses an existing engine in dual fueling mode with little modification. The objective of this work is to model the combustion of CNG and syngas in dual fueling strategy for the combustion stability and performance enhancement of a CNG engine. A single-cylinder, four-stroke spark ignition engine with a compression ratio of 14:1 is used in the current work. The engine is operated at 1200 rpm at idle condition (no load). The fuel injection timing for syngas is considered at 300o BTDC while 120o BTDC for CNG. The ignition timing is considered at 32o BTDC. The modeling work include a cold flow, combustion and comparison of the combustion parameters of base-line CNG data with that of CNG-Syngas dual fuel. A dual fuel strategy is modeled as its geometry. The CFD model was validated by using an experimental result from the engine at 1200 rpm with no load condition fueled with CNG. Addition of syngas into CNG fuel has increased the burning temperature there by the peak pressure. The thermal efficiency of the engine is improved. Syngas is inducted to the air induction system for enrichment in CNG-syngas dual fueling operation in the current CFD modelling work. Syngas-enrichment in CNG-fueling has improved combustion stability and the combustion efficiency. This is attributed to the higher laminar speed of hydrogen in the syngas.
format	Conference or Workshop Item
author	Ngu, Tai Tieng Hagos, F. Y. A. Rashid, A. Aziz R., Mamat
author_facet	Ngu, Tai Tieng Hagos, F. Y. A. Rashid, A. Aziz R., Mamat
author_sort	Ngu, Tai Tieng
title	CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy
title_short	CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy
title_full	CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy
title_fullStr	CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy
title_full_unstemmed	CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy
title_sort	cfd modelling of combustion of cng and hydrogen-rich syngas under a dual fueling strategy
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/19589/ http://umpir.ump.edu.my/id/eprint/19589/1/4.%20CFD%20modelling%20of%20combustion%20of%20cng%20and%20hydrogen.pdf http://umpir.ump.edu.my/id/eprint/19589/2/4.1%20CFD%20modelling%20of%20combustion%20of%20cng%20and%20hydrogen.pdf
first_indexed	2023-09-18T22:28:00Z
last_indexed	2023-09-18T22:28:00Z
_version_	1777416096671858688

CFD modelling of combustion of CNG and hydrogen-rich syngas under a dual fueling strategy

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