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Fuels and combustion pdf download
FUELS AND COMBUSTION. Syllabus. Introduction to Fuels, Properties of Fuel oil , Coal and Gas, Storage, handling and preparation of fuels, Principles of Combustion, Combustion of Oil, Coal, and Gas. This chapter is a prelude to boilers and furnaces. Introduction to Fuels. The various types of fuels like liquid, solid and. UNIT III FUELS AND COMBUSTION. Calorific value – classification – coal – proximate and ultimate analysis – metallurgical coke – manufacture by Otto- Hoffmann method – petroleum processing and fractions – cracking – catalytic crang and methods – knocking – octane number and cetane number – synthetic petrol. INTRODUCTION. A fuel is a combustible substance containing carbon as the main constituent which on proper burning gives large amount of heat that can be used economically for domestic and industrial purposes. During the process of combustion of a fuel, the atoms of carbon, hydrogen, etc combine with oxygen with.
C H A P T E R 3. FUELS AND COMBUSTION. Introduction to Combustion. Combustion Basics. The last chapter set forth the basics of the Rankine cycle and the principles of operation of steam cycles of modern steam power plants. An important aspect of power generation involves the supply of heat to the working fluid. •Owing to imperfect mixing combustion always needs a little extra oxygen. It is known as excess air. •Excess air coefficient = Actual air/ Theoretical air. •Total excess air at exit = excess air at entry + leakage (negative draft). •Flue gas volume. V. G. = Vg + (exair-1)V air. (1+X m.) Nm3/kg. Fuel. called fuels. This energy is released during the chemical reaction of the fuel with oxigen. The fuel elements combine with oxygen is an oxidation process which is rapid and is accompanied by the evolution of heat. Combustion technology is the science of how to burn fossil fuel under industrial circumtances. But to do this.
COMBUSTION AND FUELS. BASIC COAL FURNACES. System for coal burning: a) Moving grate, b) Fixed bed, c) Fluidized bed d) Pulverized coal flame air fumes coal pyrolysis drying gasification combustion ash air pulverized coal secondary air d) b). COMBUSTION AND FUELS. PHASES OF LIQUID FUEL BURNING. Two phases of liquid fuel burning: a) phase of liquid evaporation, b) phase of vapour burning. Droplet of fuel. Cloud of vapour. All internal combustion engines use fuel as the source for heat driving the thermo - dynamic process that will eventually yield mechanical power. The fuel properties are crucial for the combustion process. Some combustion processes require a fuel that is very prone to ignition, and some have just the opposite requirement.