Describe the function of a condensate drain and feedwater control in a steam cycle.

Describe the function of a condensate drain and feedwater control in a steam cycle.

• A. Condensate drains to waste; feedwater controls dosing
• B. Condensate vent to atmosphere; feedwater maintains steam pressure
• C. Condensate is recycled to turbine; feedwater modulates fuel supply
• D. Condensate drains from the steam system back to the feedwater tank; feedwater control maintains proper water level and pressure in the boiler

Answer: (D)

In a steam cycle, the condensate drain is part of the condensate return path: hot condensate from the steam system is collected and returned to the feedwater system, usually back to the feedwater tank or deaerator, so it can be reheated and sent back to the boiler. This recycles energy and minimizes makeup water and chemical usage. The feedwater control then adjusts how much feedwater is supplied to the boiler to keep the water level at the proper value. Maintaining the correct water level is crucial for safe operation—too high can cause carryover; too low can lead to overheating and damage. By controlling the feedwater flow, it also helps stabilize boiler pressure indirectly through the steady supply of water and energy balance. So, condensate drains back to the feedwater system, and feedwater control maintains the correct water level and boiler pressure for safe, efficient steam generation.

In a steam cycle, the condensate drain is part of the condensate return path: hot condensate from the steam system is collected and returned to the feedwater system, usually back to the feedwater tank or deaerator, so it can be reheated and sent back to the boiler. This recycles energy and minimizes makeup water and chemical usage.

The feedwater control then adjusts how much feedwater is supplied to the boiler to keep the water level at the proper value. Maintaining the correct water level is crucial for safe operation—too high can cause carryover; too low can lead to overheating and damage. By controlling the feedwater flow, it also helps stabilize boiler pressure indirectly through the steady supply of water and energy balance.

So, condensate drains back to the feedwater system, and feedwater control maintains the correct water level and boiler pressure for safe, efficient steam generation.