Secondary Air Fan (SA Fan)

The secondary air fans (SA fans) play an important supporting role in power plants. The secondary fan allows for complete combustion of the fuel inside the furnace. As and when required the SA fan is used to increase the air flow to improve the efficiency and avoid wastage of fuel. Coal based thermal plants share of electricity generation is highest compared to other methods like hydroelectric, wind, gas or solar based plants. Further, this can be run continuously. Coal is mined at one location and then sufficient water and land is required for the power plant. Considering the cost of transport and high costs of coal mining, it would not be right to do inefficient burning of the coal in the furnace.