What is meant by "superheating" in boiler systems?

Superheating in boiler systems refers to the process of heating steam beyond its saturation temperature. When water is heated to the point where it turns into steam, it reaches a saturation state where any additional heat input increases the temperature of the steam without raising its pressure. This results in "superheated steam."

Superheated steam has several advantages, including increased thermal efficiency and the ability to do more work in turbines because it is drier and contains more energy than saturated steam. This leads to improved performance in power cycles and industrial applications where steam is used.

The other options do not accurately describe the concept of superheating. Lowering steam pressure pertains to pressure regulation rather than heating, cooling steam would typically refer to the condensing process rather than superheating, and maintaining water levels is crucial for boiler operation but not related to superheating specifically.