As energy and environmental policies for 2030 and 2050 are encouraging several Countries to investigate the viability of alternative green fuels to replace fossil one and help decarbonizing energy sector, hydrogen and ammonia are two promising solutions. Green hydrogen production is investigated considering both alkaline and PEM electrolysers commercial products, comparing the market solutions from the energetic standpoint considering three different plant sizes, representative of small (1 MW), medium (10 MW) and large (60 MW) scale applications. Hydrogen compression and storage in pressurized tanks is included in the analysis. Considering the drawbacks in hydrogen storage, a second plant lay-out is investigated considering an Air Separation Unit (ASU) and ammonia synthesis plant for the three different sizes. Ammonia is then stored in liquid form. For each solution, a techno-economic analysis is performed to evaluate: (i) CAPEX; (ii) OPEX; (iii) hydrogen and ammonia production costs. Authors evaluate the economic feasibility comparing final costs for green hydrogen and ammonia with market values, considering different scenarios and different green electrical energy prices. Finally, the authors investigate the influence of electrolysers’ CAPEX decrease in a next future scenario (2030) on economic feasibility.
