What defines a steam boiler?

A steam boiler is defined as a closed vessel under pressure that transforms water into steam. This definition is crucial because the primary function of a steam boiler is to convert the thermal energy generated from burning fuel into the heat required to turn water into steam. The steam produced can then be used for various applications, such as heating, power generation, or industrial processes.

The requirement for the vessel to be closed and under pressure is significant. A closed system allows for increased efficiency and higher temperatures, which directly impacts steam generation. Moreover, the ability to maintain pressure is essential for steam boilers because it influences the boiling point of water; the higher the pressure, the higher the temperature at which water can boil and turn into steam.

By understanding this definition, one can better appreciate the operating principles and safety considerations that govern the design and use of steam boilers in stationary engineering contexts.