Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Steam engine:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

The efficiency of a Rankine cycle is usually limited by the working fluid. Without the pressure reaching supercritical levels for the working fluid, the temperature range over which the cycle can operate is small; in steam turbines, turbine entry temperatures are typically 565 °C (1,049 °F; 838 K) (the creep limit of stainless steel) and condenser temperatures are around 30 °C (86 °F; 303 K). This gives a theoretical Carnot efficiency of about 64% compared with an actual efficiency of 42% for a modern coal-fired power station. This low turbine entry temperature (compared with a gas turbine) is why the Rankine cycle is often used as a bottoming cycle in combined-cycle gas turbine power stations.[citation needed]