Steam Boiler

Steam Boiler Basics

In this lesson, we will study the basics of a steam boiler.

Steam Boiler

      Boiler or more specifically a steam boiler is an essential part of the thermal power plants.

      Definition of Boiler

      A steam boiler or simply a boiler is basically a closed vessel into which water is heated until the water is converted into steam at the required pressure. This is the most basic definition of the Steam boiler.

Working Principle of Boiler

The basic working principle of the boiler is very simple and easy to understand. The boiler is essentially a closed vessel inside which water is stored. Fuel (generally coal) is bunt in a furnace and hot gasses are produced. These hot gasses come in contact with water vessels where the heat of these hot gases transfer to the water and consequently steam is produced in the boiler.

Then this steam is piped to the turbine of a thermal power plant. There are many different types of boiler utilized for different purposes like running a production unit, sanitizing some area, sterilizing equipment, to warm up the surroundings etc.

     Steam Boiler Efficiency

The percentage of total heat exported by outlet steam in the total heat supplied by the fuel (coal) is called  steam boiler efficiency

   

      It includes thermal efficiency, combustion efficiency & fuel to steam efficiency. Steam boiler efficiency depends upon the size of the boiler used. The typical efficiency of a steam boiler is 80% to 88%. Actually, there are some losses that occur like incomplete combustion, radiating loss occurs from steam boiler surrounding wall, defective combustion gas, etc. Hence, the efficiency of the steam boiler gives this result.

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