Combustion Characteristics of CAI Combustion with Alcohol Fuels

Tongroon, Manida; Zhao, Hua

doi:10.4271/2010-01-0843

Cited by 20 publications

(13 citation statements)

References 18 publications

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“…HCCI engines are inherently fuel-flexible and can be operated using low-or high-grade fuels, given that the fuel-air mixture can be heated up to auto-ignition temperature of the fuel in the combus tion chamber [4], In particular, HCCI engines can be operated on primary alcohols such as ethanol and methanol [5][6][7], Alcohols are attractive alternatives to gasoline/diesel, and they are identified as fuels having potential to improve urban air quality due to their cleaner combustion characteristics [8]. Alcohols, mainly ethanol and to a lesser extent methanol, are considered as alternative fuels for in ternal combustion engines [9][10][11], Ethanol is a biomass-derived renewable fuel, which can be produced by fermentation of sugars from organic biomass materials [12]; however, methanol is mainly produced from coal-or petrol-based fuels and natural gas.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Particulate Size and Number Distribution in an Ethanol and Methanol Fueled HCCI Engine

Maurya

Agarwal

2014

Journal of Energy Resources Technology

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Experimental Investigations of Particulate Size and Number Distribution in an Ethanol and Methanol Fueled HCCI EngineAlcohols (ethanol and methanol) are being widely considered as alternative fuels for automotive applications. At the same time, homogeneous charge compression ignition (HCCI) engine has attracted global attention due to its potential of providing high engine efficiency and ultralow exhaust emissions. Environmental legislation is becoming increasingly stringent, sharply focusing on particulate matter (PM) emissions. Recent emission norms consider limiting PM number concentrations in addition to PM mass. Therefore, present study is conducted to experimentally investigate the effects of engine operating parameters on the PM size-number distribution in a HCCI engine fueled with gasoline, ethanol, and methanol. The experiments were conducted on a modified fourcylinder diesel engine, with one cylinder modified to operate in HCCI mode. Port fuel injection was used for preparing homogeneous charge in the HCCI cylinder. Intake air preheating was used to enable auto-ignition of fuel-air mixture. Engine exhaust particle sizer (EEPS) was used for measuring size-number distribution of soot particles emitted by the HCCI engine cylinder under varying engine operating conditions. Experiments were conducted at 1200 and 2400 rpm by varying intake air temperature and air-fuel ra tio for gasoline, ethanol, and methanol. In this paper, the effect of engine operating pa rameters on PM size-number distribution, count mean diameter (CMD), and total PM numbers is investigated. The experimental data show that the PM number emissions from gasoline, ethanol, and methanol in HCCI cannot be neglected and particle numbers increase for relatively richer mixtures and higher intake air temperatures.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Particulate Size and Number Distribution in an Ethanol and Methanol Fueled HCCI Engine

Maurya

Agarwal

2014

Journal of Energy Resources Technology

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“…Cleaner combustion and hence, reduced exhaust emissions is another benefit of these oxygenated fuels. Therefore, it is interesting to combine the advantage of HCCI combustion with oxygenated fuels [10]. Oakely et al investigated HCCI combustions on single cylinder engine using methanol and ethanol at raised intake air temperature [11].…”

Section: Introductionmentioning

confidence: 99%

Particulate Morphology and Toxicity of an Alcohol Fuelled HCCI Engine

Maurya

Ágarwal

2014

SAE Int. J. Fuels Lubr.

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Homogeneous charge compression ignition (HCCI) engines are attracting attention as next-generation internal combustion engines mainly because of very low NO x and PM emission potential and excellent thermal efficiency. Particulate emissions from HCCI engines have been usually considered negligible however recent studies suggest that PM number emissions from HCCI engines cannot be neglected.This study is therefore conducted on a modified four cylinder diesel engine to investigate this aspect of HCCI technology. One cylinder of the engine is modified to operate in HCCI mode for the experiments and port fuel injection technique is used for preparing homogenous charge in this cylinder. Experiments are conducted at 1200 and 2400 rpm engine speeds using gasoline, ethanol, methanol and butanol fuels. A partial flow dilution tunnel was employed to measure the mass of the particulates emitted on a pre-conditioned filter paper. The collected particulate matter (PM) was subjected to chemical analyses in order to assess the amount of Benzene Soluble Organic Fraction (BSOF) and trace metals (marker of toxicity) using Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). Field emission scanning electron microscope (FE-SEM) was used for particulate morphology investigations at 1000X and 5000X resolution. Trace amount of particulates were observed on the filter paper for the test fuels. The concentration of different trace metals analyzed also showed decreasing trends with increasing engine loads.

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“…ߟ ௧ = bp mass of fuel x calorific value of fuel (12) Brake Mean Effective Pressure: The brake mean effective pressure [27] is defined to measure engine performance and indicates an engine's capacity to produce power output over the full engine speed range. The equation is expressed as below:…”

Section: Icmer 2015mentioning

confidence: 99%

“…It also another significant research purposes to combine the advantages of HCCI combustion mode using alternative renewable oxygenated fuels. Tongroon et al [12] found that methanol showed fastest and earliest auto-ignition, followed by ethanol using optical methods investigated in HCCI combustion mode .Christensen et al [13] used a lean air-fuel mixture for HCCI engine that operated unthrottled, producing an ultra-low NO x emission result.…”

Section: Introductionmentioning

confidence: 99%

“…Ethanol can be produced from different types of sources, mainly from carbon based feed stocks. Therefore usage of alcohols in engines is another way to reduce energy resource depletion by using fossil fuels, and improve the implementation of HCCI combustion mode [12]. It also another significant research purposes to combine the advantages of HCCI combustion mode using alternative renewable oxygenated fuels.…”

Section: Introductionmentioning

confidence: 99%

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Numerical modeling on homogeneous charge compression ignition combustion engine fueled by diesel-ethanol blends

et al. 2016

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Abstract. 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.

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Combustion Characteristics of CAI Combustion with Alcohol Fuels

Cited by 20 publications

References 18 publications

Experimental Investigations of Particulate Size and Number Distribution in an Ethanol and Methanol Fueled HCCI Engine

Experimental Investigations of Particulate Size and Number Distribution in an Ethanol and Methanol Fueled HCCI Engine

Particulate Morphology and Toxicity of an Alcohol Fuelled HCCI Engine

Numerical modeling on homogeneous charge compression ignition combustion engine fueled by diesel-ethanol blends

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