2nd Class Power Engineering (2B2) Exam 2025 – 400 Free Practice Questions to Pass the Exam

Boiler efficiency is significantly influenced by combustion efficiency, heat recovery, and heat transfer.

Combustion efficiency refers to how effectively the fuel is burned within the boiler. If the combustion process is incomplete, it leads to unburned fuel and a drop in overall efficiency. Proper adjustment of the air-to-fuel ratio, burner maintenance, and ensuring optimal combustion conditions are essential for maximizing this efficiency.

Heat recovery involves capturing waste heat from the flue gases or other processes and reusing it to preheat the boiler feedwater or for other applications. This practice reduces the amount of energy needed to heat the water for steam generation, thereby improving the overall efficiency of the boiler.

Heat transfer is another critical factor; it represents how effectively the heat generated in the combustion process is transferred to the water or steam. Efficient heat exchangers and well-designed boiler systems enhance heat transfer, minimizing losses due to radiation or convection.

These factors collectively contribute to a well-performing boiler that operates with higher efficiency, leading to energy savings and reduced emissions. Understanding these elements enables operators and engineers to make informed decisions to optimize boiler operations.