The following are available as turbines:
Simple Steam Turbine / General Expander (Component 6)
Gas Turbine (Turbine only) (Component 23)
Gas Turbine (Macro, simple characteristic lines) (Component 40)
Steam Turbine (Extended) (Component 56)
Gas Turbine (detailed characteristic field) (Component 57)
Governing stage (Nozzle Section Control) (Component 58)
Alstom Reheat Gas Turbine (DLL required) (Component 76)
ENEXSA Gas Turbine (OEM GT) (Component 106)
Steam turbine (SCC) (Component 122)
Map based Turbine (Component 164)