Abstarct: In this engineering project, a novel configuration of multiple production systems is introduced, utilizing solar and geothermal renewable energy sources to produce green fuel hydrogen and fresh water. The integrated system comprises several components, including a thermal photovoltaic system, an organic Rankine cycle, an alkaline electrolysis system, and a reverse osmosis water softener.The thermal photovoltaic system employs a half-tube structure to enhance contact between the working fluid and the collector surface. Additionally, a titanium dioxide/water nanofluid is utilized to optimize the cooling process of the solar system. As a result of employing the nanofluid, the solar system achieves an electrical efficiency of 0.12 and a thermal efficiency of 0.82.The power required for the pump of the reverse osmosis water softener system, amounting to 40 kilowatts, is supplied by the solar system. Moreover, the geothermal water serves as the input for the water softener system. This geothermal water, flowing at a rate of 12.1 kg/s and at a temperature of 154 ℃, provides the necessary thermal energy for the organic Rankine cycle, which utilizes isobutane as the working fluid. The organic Rankine cycle generates the power required by the alkaline electrolysis system, which amounts to 671 kilowatts.The integrated system exhibits an exergy efficiency of 0.4302. Assuming that all the electricity produced in the organic Rankine cycle is used to produce hydrogen, the final production rate of the system is equal to 1.397 kg/s of fresh water and 18.5 kg/h of hydrogen.The initial capital investment required for the proposed system is 1.9 million dollars, and the investment return period is projected to be 4 years.