Chapter 4: Fuels
Transcript of Chapter 4: Fuels
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Chapter 4: Fuels ME 419 Thermal Systems Design
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Simple Organic Chemistry
ether group
alcohol group ester group
peroxide group
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Xylene
Benzene
Toluene
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From Obert, E., “Internal Combustion Engines”
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from Obert, E. F., Internal Combustion Engines and Air Pollution, Third Edition, ISBN 0-352-04560-0, Harper Row Publishers, Inc. (1973)
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from Obert, E. F., Internal Combustion Engines and Air Pollution, Third Edition, ISBN 0-352-04560-0, Harper Row Publishers, Inc. (1973)
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from Obert, E. F., Internal Combustion Engines and Air Pollution, Third Edition, ISBN 0-352-04560-0, Harper Row Publishers, Inc. (1973)
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Evaporation and Combustion
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End Gas Region
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Relationship between Time, Temperature, and Knock
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Variables that control auto-ignition are: A Temperature B. Density C. Time (ignition delay) D. Composition 1. Fuel 2. F/A ratio 3. Turbulence 4. Other (catalysts, walls, gradients in temperature, etc.
From Obert, E., “Internal Combustion Engines”
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Relationship between Octane Number and Cetane Number
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•Copper Corrosion
•Pour Point
•Cloud Point
•Cold Filter Plugging Point
•Viscosity
•Lubricity
Diesel Fuel Specifications
•Cetane Number
•Total Contamination
•Carbon Residue
•Ash
•Flash Point
•Gum
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Summary
• Nomenclature
▫ (know alkanes to octane and benzene compounds)
• Distillation and Distillation Curves
• Gasoline
▫ evaporation and combustion
▫ auto-ignition characteristics
▫ CFR engine and octane rating
• Diesel
▫ cetane number
▫ fuel specifications
▫ alternate fuels