What is the primary function of a boiler feedwater pump?

The primary function of a boiler feedwater pump is to supply water to the boiler. This is a critical role in the operation of a boiler system, as the boiler requires a constant supply of water to generate steam. The feedwater pump moves water from a feedwater source, such as a condensate return tank or a water supply reservoir, into the boiler where it is heated to produce steam.

In a boiler system, maintaining a proper water level is essential for safe and efficient operation. If the water level is too low, it can lead to overheating and potentially cause damage to the boiler. Thus, the feedwater pump plays an essential role in ensuring that the boiler has the necessary amount of water to function properly.

In contrast, the other options are not correct. For instance, cooling the boiler is related to heat exchange processes and may involve other equipment, such as cooling towers or heat exchangers. Monitoring steam output is typically the responsibility of pressure gauges and other measuring instruments, whereas enhancing combustion efficiency involves adjusting the fuel-to-air ratio and optimizing combustion conditions, which is separate from the feedwater supply function.