Such energy is recovered as the natural gas. However, natural gas represents nonrenewable energy source because of the inability to replenish such energy.
Geothermal energy depicts the heat, which is obtained from the earth. Such heat generates a sustainable and clean energy. The resources of geothermal energy vary from deep hot rock in the ground to shallow hot water. These resources contribute in generation of energy, which does not contribute in emission of greenhouse gases. Further, geothermal energy has few chemical pollutants, minimal waste and it is renewable.
Rankine cycle depicts a model, which is used in the process of predicting steam turbine systems performance. The system, which is a thermodynamic cycle, changes heat into mechanical work (Stanley, 2010). The supply of the heat is on the external closed loop whereby the working fluid is water. As such, the Rankine Cycle is a form of the steam engine, which has the potential of generating