In this article we will discuss about the measurement of exhaust gas constituents by two methods: 1. Conventional Method and 2. Modern Methods. The exhaust gas analysis is performed to determine the constituents of various components of gases in the exhaust gas. The analysis is important for determining the air fuel ratio, excess air, combustion products and unburnt components. There [...]
In this article we will discuss about how to Calculate calorific value of fuels. Meaning of Calorific Value: The calorific value of a fuel is amount of heat liberated by its complete combustion. For solid and liquid fuels, calorific value is expressed in kJ/kg, whereas for gaseous fuels it is expressed as kJ/m3 where m3 is normal cubic metre measured [...]
When the combustion of the fuel takes place, the products of combustion will be carbon dioxide, (sometimes carbon monoxide may also be present) sulphur dioxide, vapour and nitrogen all the while, oxygen also will be present in the flue gases. Generally, the composition of solid or liquid fuels is expressed by weight, whereas that of the gaseous fuels is expressed [...]
In this article we will discuss about:- 1. Introduction of Chemistry of Combustion 2. Enthalpy of Formation 3. Enthalpy and Internal Energy of Reaction 4. Adiabatic Flame Temperature 5. Free Energy and Chemical Equilibrium 6. Equilibrium Constant for a Reaction. Contents: Introduction of Chemistry of Combustion Enthalpy of Formation Enthalpy and Internal Energy of Reaction Adiabatic Flame Temperature Free Energy [...]
Fluidization is a new method of mixing fuel and air for obtaining combustion. A fluidized bed may be defined as the bed of solid particles behaving as a fluid. It operates on the following principle: When an evenly distributed air is passed upward through a finely divided bed of solid particles at low velocity, the particles remain undisturbed but if [...]
The schematic diagram of a circulating bed boiler system is shown in Fig. 6.4. The combustion of biomass in a fluidised bed requires that the bed be initially heated by means of a gas burner to a temperature of approximately 400°C. The gas burner is then shut off and biomass feed is started. The fuel ignites and from then on [...]