The organic Rankine cycle (ORC) applies the principle of the steam Rankine cycle, but uses organic working fluids with low boiling points, instead of steam, to recover heat from a lower temperature heat source. Fig. 1 below shows a schematic of an ORC and its process plotted in a T-s diagram in Fig.2. The cycle consists of an expansion turbine, a condenser, a pump, a boiler, and a superheater (provided that superheat is needed).