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This paper sheds the light on the future of green hydrogen in Tunisia. So, a detailed economic assessment and evaluation of the Levelized Hydrogen Cost (LHC) and the Net Profit (NP) of a Photovoltaic (PV) Hydrogen Refueling Station (HRS) are presented and discussed. Tunisia is characterized by its high PV potential which makes the production of electricity from solar energy an effective alternative source. However, due to the regulations and issues related to the connection of medium PV scale to the power grid, the energy produced from renewable sources (RS) is still less than 3% of the total produced electricity. On the other hand, the price of hydrocarbon fuels is still increasing. The gap between production and total demand in hydrocarbons has created a deficit in the primary energy balance. Therefore, the production of hydrogen from solar energy for refueling Fuel Cell Vehicles (FCV)s consists of a promising solution to boost the development of the country, reduce hydrocarbon fuels consumption, and protect the environment. The sizing of a small PV-HRS to produce 150 kg of hydrogen per day shows the necessity to install PV systems with a total Direct Current (DC) capacity of 1.89 MWp. The Initial Cost (IC) analysis shows that while the PV system cost represents 48.5% of the total IC, the IC of electrolysers represents 41%. The storage system cost is approximately equal to 3.2% of the total IC. The LHC is equal to 3.32€/kg with a total IC of 2.34 million €. • An economic assessment and evaluation of PV-HRS producing 150 kg of hydrogen in Tunis are presented. • The LHC for the hydrogen produced at PV-HRS is estimated at 3.32€/kg. • The 150 kg PV-HRS has a breakdown of 8 years for a selling price of 8€ per kg of Hydrogen. • The IC and the LHC depend mainly on the prices of the PV panels, electrolyzers, and storage tanks. • Green hydrogen is a promising solution for future transport systems in Tunisia. [ABSTRACT FROM AUTHOR]

Even being far from spared by the new challenges, the automotive sector is at the heart of changes as it produces of greenhouse gas emissions and it is responsible for air pollution and global warming. So, moving towards electricity productions based on green/clean energy has become increasingly important. The fuel cell (FC) produces electrical energy from hydrogen and oxygen without the release of pollutants. Its use in the automotive sector is therefore considered in the long term to address the problem of sustainable mobility. However, some matters are persisting due to the feeble voltage generated at the fuel cell outflow. Eventually, a DC/DC converter turns to be necessary to enhance this voltage to the appropriate standard of the DC bus voltage. In order to fulfill all requirements for electrical vehicle applications using fuel cell as main energy, the interleaved boost DC/DC and isolated DC/DC converters were adopted to provide better performance. This research work focuses on the analysis and design approach for the new topology of DC/DC power converter that interface a fuel cell used an electric vehicle. The proposed interleaved boost converter is validated experimentally by the obtained results from a prototype that has been built and tested in our laboratory based on DSP1104 and FPGA. The interleaved converter which ensures the minimization of the output current ripples of the fuel cell and guarantee the reliability of the system. Image 1 • Modeling and implementation of PEM fuel cell system. • Analysis and design of Interleaved Boost DC-DC Converter. • Simulation and experimentation the Interleaved Boost DC-DC Converter. [ABSTRACT FROM AUTHOR]