What device adds sensible heat to superheated steam after the primary turbine?

The addition of sensible heat to superheated steam after it exits the primary turbine is accomplished through the use of a re-heat coil. This device works by transferring heat to the steam, enhancing its temperature and energy content before it proceeds to the next stage in the steam turbine cycle.

In steam systems, especially in power generation, reheat coils are commonly implemented to improve the thermal efficiency of the steam cycle. By raising the temperature of the steam before it enters the high-pressure turbine again, the overall efficiency and output of the system are maximized. The reheat process allows for the extraction of more work from the steam, translating to better performance and productivity of the turbine.

Other options, while they are also important devices in different contexts, do not specifically function to add sensible heat to superheated steam after the primary turbine. A heat exchanger typically facilitates heat transfer between two fluids but doesn’t necessarily reheat steam specifically; a blower fan is used to move air or gas, and a pre-heater usually warms a fluid before a process rather than adding heat to steam in the reheat phase.