What are the three components of combustion air?

The three components of combustion air consist of fuel combustion air, excess air, and dilution air, which is why this answer is correct.

Fuel combustion air is the minimum amount of air necessary for the complete combustion of the fuel being burned. It ensures that the fuel reacts with enough oxygen to combust fully and efficiently.

Excess air refers to additional air supplied beyond the theoretical amount needed for complete combustion. This helps to achieve a more complete burn of the fuel, reducing carbon monoxide emissions and improving efficiency.

Dilution air is introduced to reduce flue gas temperatures or to control emissions by diluting the combustion gases. It is especially important for ensuring safety and compliance with environmental regulations.

Together, these components work to facilitate safe and efficient combustion processes in fuel systems. Understanding these elements helps in optimizing combustion efficiency and meeting emission standards.