Chapter 6, Problem 6.43P

Interpretation Introduction

Interpretation:

Determine the thermal efficiency of a steam turbine which is ratio of actual work of the turbine to the work of a turbine operates reversibly and adiabatically from the same initial condition to same final pressure. Also, power output of turbine

Concept Introduction:

The thermal efficiency of a steam turbine is calculated as:

  $\eta =\frac{\text{actual work of the turbine}}{\text{work of a turbine operating isentropically}}=\frac{H_2-H_1}{H^{\text{'}}-H_1}$

Where,

  $H_2$ is the enthalpy of exhaust from the turbine

  $H_1$ is enthalpy of steam given to turbine

  $H^{\text{'}}$ is enthalpy of steam when turbine operates reversibly and adiabatically from the same initial condition to same exhaust pressure.