Investigation of Energy and Exergy of Geothermal Organic Rankine Cycle

In this study, modeling and thermodynamic analysis of the combined double flash geothermal cycle generation was conducted using zeotropic fluid as working in Organic Rankine Cycle (ORC). The performed based on first second laws thermodynamics. Hexane, cyclohexane, isohexane, R245fa, R236ea exhibit good performance at higher temperatures. three fluids—hexane, isohexane—were used. First, model results for pure fluids were compared with those previous studies. Then, important parameters cycle, including efficiency law thermodynamics, net productive power, amount exergy destruction caused by changing mass fraction refrigerant (investigated whole ORC), obtained compared.