How are fuels divided ? Write disadvantages and advantages of each types.
(b) A sample of coal supplied to a boiler has the following composition by mass :
Carbon = 88%, Hydrogen = 5%, Oxygen = 3%, Nitrogen = 1%
Determine (a) Mass of air needed for complete combustion of 1 Kg of coal.
(b) Dry analysis both by volume and mass of products of combustion when 15% excess air is supplied.