On-Grid Hybrid PV/WT Renewable Energy System for Green Hydrogen Production
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Abstract
The term "Power-to-X" (PtX) refers to a set of techniques for converting electrical energy into another form of energy, primarily focusing on hydrogen production. Produced hydrogen can be stored, distributed, and then used directly (to regenerate electricity, generate heat, or in transportation, steel, and chemical industries) or indirectly to produce ammonia, fertilizers, methane, methanol, e-fuels, and more. Thus, PtX is a mean of storing intermittent energy and a key contributor to the energy transition and decarbonization. In this article, we examine a grid-connected green hydrogen production system. This 1 MW renewable capacity system consists of a 300 kW wind turbine, a 700 kW photovoltaic field, and a 209 kW electrolyzer. In this system, any excess energy is integrated into the grid, enhancing overall energy sustainability. Conversely, when energy output is insufficient for the electrolyzer, the deficit is sourced from the grid, ensuring continuous and reliable operation. This dynamic interaction with the grid optimizes energy usage and reinforces the stability of the system. The results show an annual hydrogen production of about 16 tons, renewable energy production of approximately 1.9 GWh/year, a 20.85% capacity factor, a shortage of about 144.5 MWh, and an energy excess of about 824 MWh.
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