In the present research, energy derived from the geothermal uid is utilized to generate power. In the rst case of power generation, the model of the geothermal double-e ect instantaneous evaporation cycle is employed, while in the second one, the single-e ect evaporation combined cycle and Rankine cycle with di erent organic uids are utilized. The e ect of several organic uids in the combined cycle is then examined. The SPECO method was then incorporated in the economic analysis. According to the mentioned analysis, net power generation reached its maximum value for the combined cycle with water vapor and its minimum value for the double-e ect instantaneous evaporation cycle with a considerable di erence. Throughout the experiments, increasing the separator pressure at the constant evaporator temperature reduced the power generation cost for combined cycles. The lowest power generation cost was attributed to the combined cycle with operating uid R113 while the highest amount of power generation cost was related to the combined cycle with ammonia uid. The exergoeconomic coe cient, i.e., the ratio of the purchase price components to the sum of costs associated with total exergy destruction as well as the cost associated with purchasing cycle components, was also the highest in the combined cycle with R113 and the lowest in the double-e ect instantaneous evaporation cycle.