How to calculate the steam turbine heat rate?

Station heat rate = Specific fuel consumption * Calorific value of fuel

Turbine heat rate = (Main steam flow * Main steam enthalpy + Aux Steam flow * Aux steam enthalpy - Feed water flow * Feed water enthalpy + Makeup water flow* Makeup water enthalpy)/Power generation

Unit of Heat rate is kcal/kWh, kJ/kWh,Mcal/MWh, MJ/MWh,

Turbine efficiency = 1/ turbine heat rate for Kcal/KWh is 860/ turbine heat rate

For kJ/kWh is 3600/turbine heat rate

Station efficiency = 1/ station heat rate for Kcal/KWh is 860/ station heat rate

For kJ/kWh is 3600/station heat rate