Calculations involved in Rankine Cycle
To analyse and determine the efficiency of rankine cycle by taking working fluid as water (1 kg) flowing through all the components of rankine cycle system.
By observing the rankine cycle in P-V, T-S and H-S diagrams as shown in Figure for calculating the efficiency of the rankine cycle.
The heat supplied = Q1 = (h1 – h3) – Wp
Where Wp = (h4 – h3) is called pump work per kg steam.
The heat rejected into the condenser
= Q2 = (h2 – h3)
Net work done per kg of steam
W = Q1 – Q2 = WT – WP = (h1 – h3) – Wp
Where WT = turbine work
The expression of thermal efficiency can also be developed by introducing thermodynamic mean temperature of heat addition. Thermodynamic mean temperature of heat addition