Which unit is used to measure condenser vacuum?

The unit used to measure condenser vacuum is indeed condenser vacuum. This measurement refers to the pressure within the condenser of a cooling system, where the steam is converted back into water after passing through a turbine. A vacuum in this context means the pressure is below atmospheric pressure, and it is typically measured in inches of mercury (inHg) or millimeters of mercury (mmHg).

Understanding condenser vacuum is crucial for the efficiency of cooling systems because a higher vacuum level generally indicates better heat exchange efficiency. It allows the system to operate at lower temperatures and with less energy consumption. Maintaining the right vacuum in the condenser ensures that the system minimizes back pressure on the steam turbine, allowing for greater energy extraction and improved system performance.

The other options refer to different measurements and elements within plant operations. Boiler draft is related to the airflow in boiler systems, boiler pressure measures the pressure inside a boiler, and condenser flow pertains to the volume of coolant passing through the condenser. Each has its specific applications and relevance, but they do not pertain directly to vacuum measurements.