Modeling a Novel Integrated System for Production Hydrogen and Power by Combining ORC Cycle & Solar Biogas Steam Reforming System

In this paper, a biogas steam reforming system, ORC, is combined in order to produce hydrogen and power at the same time. The mixture of biogas contains a large percentage of Methane, Carbon Dioxide and negligible amounts of other gases. A thermodynamic comprehensive modeling was done on the proposed system. A parametric study is also done on the energetic performance combined system. The results show that by increasing the temperature in a constant molar ratio of carbon dioxide to methane, thereby hydrogen production rate, net generative power, and energy efficiency increased. Moreover, increasing the molar ratio of carbon dioxide to methane, resulted a decrease in hydrogen production per mole of methane and an increase in the net generative power, and so the energy efficiency of the combined system decreased. the most net generative power, energy efficiency of the combined system in the case of hydrogen production is maximum, achieved to 19.24 kW, 44%; respectively; that compared to biogas, hydrogen production system through reforming, has 5% increased.