What does feedwater control regulate in the boiler system?

What does feedwater control regulate in the boiler system?

• A. Water level and pressure
• B. Temperature of exhaust
• C. Fuel flow
• D. Turbine speed

Answer: (A)

Feedwater control regulates the amount of water entering the boiler, which directly sets the steam drum water level. Keeping that level within a safe, narrow band is essential for safe and stable boiler operation. When steam demand increases, the controller raises feedwater to maintain the level and prevent overheating or surface drying; when demand drops, it reduces feedwater to avoid overfilling the drum. The water level influences how the boiler pressure behaves, so maintaining the proper level helps keep boiler pressure stable as steam generation changes. The other options are controlled by different systems: exhaust temperature by the exhaust/combustion system, fuel flow by the burner control, and turbine speed by the turbine governor adjusting steam flow.

Feedwater control regulates the amount of water entering the boiler, which directly sets the steam drum water level. Keeping that level within a safe, narrow band is essential for safe and stable boiler operation. When steam demand increases, the controller raises feedwater to maintain the level and prevent overheating or surface drying; when demand drops, it reduces feedwater to avoid overfilling the drum. The water level influences how the boiler pressure behaves, so maintaining the proper level helps keep boiler pressure stable as steam generation changes. The other options are controlled by different systems: exhaust temperature by the exhaust/combustion system, fuel flow by the burner control, and turbine speed by the turbine governor adjusting steam flow.