RANKINE CYCLE

   Steam engine and steam turbines in which steam is used as working medium follow Rankine cycle. This cycle can be carried out in four pieces of equipment joint by pipes for conveying working medium as shown in Fig. 1.1. The cycle is represented on Pressure Volume P-V and S-T diagram as shown in Figs. 1.2 and 1.3 respectively

      Efficiency of Rankine cycle = (H1 – H2)/ (H1 – Hw2).
      where,
      H1 = Total heat of steam at entry pressure
      H2 = Total heat of steam at condenser pressure (exhaust pressure)
      Hw2= Total heat of water at exhaust pressure