Power Cycles

Carnot Efficiency:

$$\eta _{th,Carnot} = 1- \frac{T_{L}}{T_{H}}$$

Work Ratio: Ratio of net work output of system to work output of turbine/compressor in system

$$r_w = \frac{\Sigma W}{\Sigma W_{out}}$$

Specific Steam Consumption (SSC): Mass flow of steam to produce a unit of power

$$SSC = \frac{ \dot{m}}{Power} = \frac{3600}{W_{net}}$$

Rankine Cycle

Superheated Rankine Cycle

Reheated Rankine Cycle

Regenerative Rankine Cycle

For ideal conditions, the Carnot cycle has theoretically higher thermal efficiency. But for practical applications, the Rankine cycle is less susceptible to inefficiencies as its work ratio is close to unity.