A draught of 15mm of water is produced by using a chimney of height 30m. The ambient air and flue gases are at 27oC and 300oC respectively. The coal burned on the grate contains 81% carbon, 5% moisture and remaining ash. Neglect the losses and assume values of burnt products equivalent to the volume of air supplied and for the complete combustion of fuel, find the percentage of excess of air supplied?

Steam generators, also known as boilers, are devices that use heat to convert liquid water into steam. They are made up of two main parts: a furnace and a boiler. The furnace burns fuel to create heat, which is then used in the boiler to convert water into steam.  How steam generators work: Fuel is burned inside one or more furnace-tubes that run through a sealed container of water. The heat from the combustion is transferred through the walls of the tubes by thermal conduction. The water is heated and steam is created. Steam generators can use a variety of heat sources,... Show more

Steam generators, also known as boilers, are devices that use heat to convert liquid water into steam. They are made up of two main parts: a furnace and a boiler. The furnace burns fuel to create heat, which is then used in the boiler to convert water into steam. 

How steam generators work:
Fuel is burned inside one or more furnace-tubes that run through a sealed container of water.
The heat from the combustion is transferred through the walls of the tubes by thermal conduction.
The water is heated and steam is created.

Steam generators can use a variety of heat sources, including:
Coal
Petroleum fuel oil
Natural gas
Municipal waste
Biomass
Nuclear fission reactors 

The type of heat source used depends on factors like cost, availability, and environmental considerations. 
Steam generators can also be used in bathrooms to provide relaxation and health benefits like improved circulation and reduced stress. 

Steam generator accessories include:
HygroMatik: Prevents essence reflux at the feed-in point
Exhaust filter: For essence intake from the container

Steam Generators & Accessories topics include: Boilers functions and classification, high pressure boilers types, draught system, power generation environmental aspects, cooling ponds and boiler mounting accessories.

Related: Energy Engineering Practice Test: Steam Power Plant

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