Resource assessment for offshore green hydrogen production

Jeleňová, Diana and Mortimer, Alan and Race, Julia and Thies, Philipp and Mignard, Dimitri (2019) Resource assessment for offshore green hydrogen production. In: WindEurope Offshore 2019, 2019-11-26 - 2019-11-28.

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Abstract

Hydrogen is a low carbon energy carrier with the ability to reduce emissions from a variety of sectors such as heating, transportation, heavy industry and power generation. With renewable energy expanding further offshore, there is potential to repurpose existing oil and gas infrastructure for transporting energy to land in the form of molecules, such as hydrogen, rather than building expensive new cables to connect wind farms to an already constrained grid. Hydrogen can help to balance intermittent renewable energy supply as well as store the excess power that would otherwise be curtailed. Areas around Scotland have been determined, which match offshore renewable and oil and gas areas of interest that could be used to produce green hydrogen offshore. A resource assessment was carried out on one of the identified sites to estimate approximate annual energy yield available for hydrogen production. The average annual energy yield (P50) was 5576.3 GWh/year with the capacity factor for the ‘grid-less’ wind farm of 42.4%. Four different scenarios were used in order to analyse the impact of the availability of the electrolyser on the capacity factor for ‘grid-less’ wind farms. Capacity factor can vary up to 4.1%, which translates to 27.7 tons of hydrogen lost per day. This could power up to 155 trains, 2,770 buses or provide a full tank for up to 5,540 cars contributing towards the 2045 net zero carbon target in Scotland.

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