What is a reciprocating triple expansion steam engine?

A reciprocating triple expansion steam engine is a type of steam engine that uses three cylinders, each operating at progressively higher pressures to extract energy from steam. The steam expands in three stages, which allows for more efficient energy conversion compared to single or double expansion engines. This design increases the engine's efficiency and power output, making it suitable for large applications, such as ships and power plants. The engine operates by converting the thermal energy of steam into mechanical work through the reciprocating motion of pistons.