What does the term 'flash steam' refer to in boiler systems?

The term 'flash steam' refers to steam that is produced when hot water is depressurized. In boiler systems, when water that is at a high temperature is rapidly released from high pressure to a lower pressure, some of the water vaporizes to form steam. This process occurs because the boiling point of water decreases as pressure decreases, allowing a portion of the hot water to 'flash' into steam.

This phenomenon is crucial in certain operations in boiler systems, especially for energy efficiency, as it recycles heat that would otherwise be lost. Flash steam can be reused in various applications, such as heating or as an energy source in turbines. The understanding of this process is important for maximizing the efficiency and effectiveness of steam systems within a boiler setup.