Preliminary investigation to the feasibility of chemical heat storage for saving the exhaust gas energy in a spark ignition engine

Cao, D; Hong, G; Wang, J

Preliminary investigation to the feasibility of chemical heat storage for saving the exhaust gas energy in a spark ignition engine

Cao, D

Hong, G

Wang, J

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Publisher:: The 20th Australasian Fluid Mechanics Conference
Publication Type:: Conference Proceeding
Citation:: Website proceedings of the 20th Australasian Fluid Mechanics Conference, 2016, pp. 1 - 4
Issue Date:: 2016-12-05

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Field	Value	Language
dc.contributor.author	Cao, D https://orcid.org/0000-0002-2936-0697	en_US
dc.contributor.author	Hong, G https://orcid.org/0000-0002-1905-1161	en_US
dc.contributor.author	Wang, J https://orcid.org/0000-0002-6282-0456	en_US
dc.date	2016-12-05	en_US
dc.date.available	2016-12-05	en_US
dc.date.issued	2016-12-05	en_US
dc.identifier.citation	Website proceedings of the 20th Australasian Fluid Mechanics Conference, 2016, pp. 1 - 4	en_US
dc.identifier.isbn	978-1-74052-377-6	en_US
dc.identifier.uri	http://hdl.handle.net/10453/75878
dc.description.abstract	Heat storage has become more important because it utilizes the wasted energy to improve the overall efficiency of energy systems. This study was aimed to develop a chemical heat storage system using magnesium hydroxide (Mg(OH)2) and its endothermic and exothermic reactions to recover the thermal energy of the exhaust gas in internal combustion engines. It was proposed that the reactor receives the thermal energy of exhaust gas in the dehydration of Mg(OH)2 to become MgO and H2O, and releases the stored energy in the hydration of MgO. To increase the thermal conductivity of pure Mg(OH)2 for enhancing the reactor’s performance, the working material used, EM8 block, is the mixture of Mg(OH)2 and expanded graphite at a ratio of 8:1. Experiments were conducted on a 6-cylinder spark ignition engine (Toyota Aurion 2GR-FE 3.5L) at stoichiometric air/fuel ratios to estimate the amount of energy loss in the exhaust gas. Experimental data of exhaust gas temperature and volume ratios of exhaust gas constitutions were used to calculate the energy rates of each of the exhaust gas constituents and to estimate the reactor efficiency in the dehydration process. Results of the preliminary investigation show that the proposed chemical heat storage system may be feasible to recover approximately 5.8 % of the heat loss in the exhaust gas	en_US
dc.publisher	The 20th Australasian Fluid Mechanics Conference	en_US
dc.relation.ispartof	Website proceedings of the 20th Australasian Fluid Mechanics Conference	en_US
dc.relation.ispartof	Australasian Fluid Mechanics Conference	en_US
dc.title	Preliminary investigation to the feasibility of chemical heat storage for saving the exhaust gas energy in a spark ignition engine	en_US
dc.type	Conference Proceeding
utslib.location	Australia	en_US
utslib.location.activity	Perth, Australia	en_US
utslib.for	0902 Automotive Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	open_access
pubs.consider-herdc	true	en_US
pubs.finish-date	2016-12-08	en_US
pubs.place-of-publication	Australia	en_US
pubs.publication-status	Published	en_US
pubs.start-date	2016-12-05	en_US

Abstract:

Heat storage has become more important because it utilizes the wasted energy to improve the overall efficiency of energy systems. This study was aimed to develop a chemical heat storage system using magnesium hydroxide (Mg(OH)2) and its endothermic and exothermic reactions to recover the thermal energy of the exhaust gas in internal combustion engines. It was proposed that the reactor receives the thermal energy of exhaust gas in the dehydration of Mg(OH)2 to become MgO and H2O, and releases the stored energy in the hydration of MgO. To increase the thermal conductivity of pure Mg(OH)2 for enhancing the reactor’s performance, the working material used, EM8 block, is the mixture of Mg(OH)2 and expanded graphite at a ratio of 8:1. Experiments were conducted on a 6-cylinder spark ignition engine (Toyota Aurion 2GR-FE 3.5L) at stoichiometric air/fuel ratios to estimate the amount of energy loss in the exhaust gas. Experimental data of exhaust gas temperature and volume ratios of exhaust gas constitutions were used to calculate the energy rates of each of the exhaust gas constituents and to estimate the reactor efficiency in the dehydration process. Results of the preliminary investigation show that the proposed chemical heat storage system may be feasible to recover approximately 5.8 % of the heat loss in the exhaust gas

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http://hdl.handle.net/10453/75878