Calculate steam turbine efficiency by dividing the theoretical pounds per hour of steam by the steam actually consumed. This is 44,855.58 pounds (theoretical) / 52,462 pounds actual = 0.855 or 85.5 percent operating efficiency.

How do you calculate steam turbine efficiency?

Using the outlet specific enthalpy, calculate the isentropic efficiency: Isentropic Efficiency = ( Inlet Specific Enthalpy - Outlet Specific Enthalpy ) / ( Inlet Specific Enthalpy - IDEAL Outlet Specific Enthalpy )

What is the efficiency of steam turbine?

Multistage (moderate to high pressure ratio) steam turbines have thermodynamic efficiencies that vary from 65 percent for very small (under 1,000 kW) units to over 90 percent for large industrial and utility sized units. Small, single stage steam turbines can have efficiencies as low as 40 percent.