In a steam turbine system, how is the water level controlled in the surface condenser hot well?

• A. Operation of the recirculation and overboard valves
• B. By the feedwater control valve
• C. By the flange seals
• D. By the condenser fan speed

Answer: (A)

The hot well level is kept in check by directing condensate flow through two paths: a recirculation path and an overboard path. The recirculation valve sends some condensate back into the condenser, effectively reducing the amount in the hot well when needed. The overboard valve releases excess condensate overboard to the drain or sea when the level rises too high. By adjusting these two valves in response to changing plant conditions, the hot well maintains a steady level, ensuring a reliable supply to the feedwater system and preserving condenser vacuum. The feedwater valve controls water going to the boiler, not the hot well level, and flange seals or condenser fan speed don’t directly regulate this level.