Numerical Modeling on Homogeneous Charge Compression Ignition Combustion Engine Fueled by Diesel-Ethanol Blends

H., Hanafi and M. M., Noor and K., Kadirgama and D., Ramasamy (2016) Numerical Modeling on Homogeneous Charge Compression Ignition Combustion Engine Fueled by Diesel-Ethanol Blends. In: MATEC Web of Conferences: The 3rd International Conference on Mechanical Engineering Research (ICMER 2015) , 18-19 August 2015 , Zenith Hotel, Kuantan, Pahang, Malaysia. pp. 1-9., 74 (00037). ISSN 2261-236X

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This paper investigates the performance and emission characteristics of HCCI engines fueled with oxygenated fuels (ethanol blend). A modeling study was conducted to investigate the impact of ethanol addition on the performance, combustion and emission characteristics of a Homogeneous Charge Compression Ignition (HCCI) engine fueled by diesel. One dimensional simulation was conducted using the renowned commercial software for diesel and its blend fuels with 5% (E5) and 10% ethanol (E10) (in vol.) under full load condition at variable engine speed ranging from 1000 to 2750 rpm with 250 rpm increment. The model was then validated with other researcher’s experimental result. Model consists of intake and exhaust systems, cylinder, head, valves and port geometries. Performance tests were conducted for volumetric efficiency, brake engine torque, brake power, brake mean effective pressure, brake specific fuel consumption, and brake thermal efficiency, while exhaust emissions were analyzed for carbon monoxide (CO) and unburned hydrocarbons (HC. The results showed that blending diesel with ethanol increases the volumetric efficiency, brake specific fuel consumption and brake thermal efficiency, while it decreases brake engine torque, brake power and brake mean effective pressure. In term of emission characteristics, the CO emissions concentrations in the engine exhaust decrease significantly with ethanol as additive. But for HC emission, its concentration increase when apply in high engine speed. In conclusion, using Ethanol as fuel additive blend with Diesel operating in HCCI shows a good result in term of performance and emission in low speed but not recommended to use in high speed engine. Ethanol-diesel blends need to researched more to make it commercially useable.

Item Type: Conference or Workshop Item (Speech)
Uncontrolled Keywords: HCCI; Diesel-ethanol fuel blend; Numerical modeling; Performance; Emissions; Combustion
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Centre of Excellence: Automotive Engineering Centre
Centre of Excellence: Automotive Engineering Centre

Faculty of Mechanical Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 05 Oct 2015 01:11
Last Modified: 31 Jan 2018 00:15
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