How does fuel oil viscosity impact boiler performance?

Fuel oil viscosity is a critical factor in the performance of boilers because it directly affects how well the fuel is atomized and combusted. When fuel oil is heated, its viscosity decreases, which allows it to be atomized more effectively as it is injected into the combustion chamber. Good atomization is essential for achieving a fine mist of fuel particles that can mix well with air for efficient burning.

If the viscosity of the fuel oil is too high, it can lead to poor atomization, resulting in incomplete combustion and a reduction in combustion efficiency. This inefficiency can manifest as increased emissions, unburned fuel, and higher operation costs. Conversely, if the viscosity is optimal, it contributes to a more efficient combustion process, leading to better overall boiler performance, lower emissions, and improved energy output.

While it is true that viscosity can influence emissions, the primary relationship lies in how it impacts the combustion process itself. The other options do not directly relate to the primary mechanical functions affected by viscosity; hence, they do not capture this essential aspect of boiler operation as effectively.