1. Irreversible Expansion & Multi-staging : A Superior Match.
P M V Subbarao
Professor
Mechanical Engineering Department
Goodness Unexplored by Sir Parson……

2. Typical Distribution of Losses in A Stage

3. Enthalpy Entropy Diagram for Multistage Turbine
Turbine Inlet
Stage 1 h
Stage 2
Stage 3
Stage 4
Stage 5
Turbine Exit s

4. Losses by stage and section for a 700 MW turbine. Source: Toshiba

5. Enthalpy Entropy Diagram for Multistage Turbine
Turbine Inlet
Stage 1 h
Stage 2
Stage 3
Stage 4
Stage 5
Turbine Exit s

6. Quasi-static Approach to Irreversible Process

7. Irreversible Thermodynamics
For a infinitesimal irreversible expansion process:
An increment of entropy along an isotherm

9. Characterization of Infinitesimal Irreversible Process