engleski

Energy Storage in Islands - Modelling Porto Santo’ s Hydrogen System

Most islands depend mainly on the importation of fossil fuels for energy production. This causes economic and environmental problems. But generally, islands present a considerable potential in renewable energies. Islands that have energy sources such as hydro or geothermal energy, can easily integrate them into the power system, but those with mainly intermittent renewable energy sources (wind, solar) have to tackle the need of energy storage. In these cases, advanced energy planning should be used, The present paper intends to demonstrate the urging need of planning energy storage systems for small islands and the results of a case-study carried out in a Portuguese island. The need to store intermittent energy is an important issue in the island of Porto Santo, since it is a small and isolated network. H2RES was used to model the energy storage scenarios for this island. One scenario was chosen to evaluate the potential of hydrogen as an energy storage vector and a pilot system of two 5kW fuel cells, one electrolyser of 13 kW, and a 55 m3 storage tank was built. The main objective of this system is to produce hydrogen from electricity from wind mills that otherwise would be wasted, and to use this hydrogen for electricity during peak time.

H2RES; Hydrogen; islands; renewable energy; fuel cell; electrolyser; energy storage; intermitent

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