Which component of a coal-fired steam generator creates the rotational force?

The component of a coal-fired steam generator that creates the rotational force is the turbine. In the context of the steam generator's operation, coal is burned in the boiler to produce steam. This steam is then directed to the turbine, where it expands and causes the turbine blades to rotate. The mechanical energy generated from the rotational motion of the turbine is what ultimately drives the generator to produce electricity.

The turbine is a critical part of the system as it converts the thermal energy from the steam into mechanical energy. This process is pivotal in a coal-fired plant, where efficiency in converting generated steam energy into electricity defines the overall performance of the facility.