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 re...