Energy losses in steam turbines
Because they are heat engines, steam turbines are subject to inefficiencies as they convert thermal energy in high-pressure steam to rotational kinetic energy in a shaft. == Admission losses == In practice, the flow of steam through a nozzle is not isentropic, but accompanied by losses which decrease the kinetic energy of steam coming out of the nozzle.
Source: Wikipedia — Energy losses in steam turbines (CC BY-SA 4.0)