The study of air fuel ratio for open furnace MILD combustion of biogas on bluff-body burner

Noor, M. M. and Wandel, Andrew P. and Yusaf, T. F. (2012) The study of air fuel ratio for open furnace MILD combustion of biogas on bluff-body burner. In: 2012 Qld Southern Regional Engineering Conference (SREC 2012), 1 Sep 2012, Toowoomba, Australia.

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Abstract

Economical fuel cost is very critical in the heating industry. Lean combustion with high air fuel ratio (AFR) is normally practiced by the industry. Low air fuel ratio or rich combustion will result in unburned hydrocarbons (UHC). UHC is a waste and pollution to the environment. This paper discussed on the modelling of air fuel ratio for the moderate and intense low oxygen dilution (MILD) combustion of biogas on bluff-body burner. Biogas is a low calorific value (LCV) gas which was formulated by using 50% methane, 20% hydrogen and 30% carbon dioxide. AFR is the ratio of air and fuel injected to the combustion chamber. Nozzle outlet size for air and fuel plays important role to determine AFR. In this study, the air and fuel nozzle size ratio used is 23:1. The AFR will be evaluated based on the UHC produced by the combustion. Stoichiometric AFR occurred when zero UHC and zero excess oxygen flow through the EGR pipe. The result shows that when AFR is 4.0, zero UHC was detected in the EGR. UHC in EGR will be waste and create unwanted combustion at the wrong location.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: USQ conference. Paper no. SREC2012-MMNoor-1.
Depositing User: Mr Muhamad Mat Noor
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 28 Sep 2012 02:42
Last Modified: 03 Jul 2013 01:28
Uncontrolled Keywords: MILD combustion; hydrocarbons; air fuel ratio; biogas; exhaust gas recirculation
Fields of Research (FOR2008): 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
09 Engineering > 0904 Chemical Engineering > 090405 Non-automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
14 Economics > 1402 Applied Economics > 140205 Environment and Resource Economics
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9699 Other Environment > 969999 Environment not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/21831

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