4.7 Article

Combined Floating Offshore Wind and Solar PV

Journal

Publisher

MDPI
DOI: 10.3390/jmse8080576

Keywords

marine renewable energy; wind energy; solar energy; resource assessment; hybrid energy systems

Funding

  1. Ports Towards Energy Self-Sufficiency (PORTOS) project - Interreg Atlantic Area Programme through the European Regional Development Fund [EAPA_784/2018]
  2. Council of Gijon through the University Institute of Industrial Technology of Asturias [SV-20-GIJON-1-19]

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To mitigate the effects of wind variability on power output, hybrid systems that combine offshore wind with other renewables are a promising option. In this work we explore the potential of combining offshore wind and solar power through a case study in Asturias (Spain)-a region where floating solutions are the only option for marine renewables due to the lack of shallow water areas, which renders bottom-fixed wind turbines inviable. Offshore wind and solar power resources and production are assessed based on high-resolution data and the technical specifications of commercial wind turbines and solar photovoltaic (PV) panels. Relative to a typical offshore wind farm, a combined offshore wind-solar farm is found to increase the capacity and the energy production per unit surface area by factors of ten and seven, respectively. In this manner, the utilization of the marine space is optimized. Moreover, the power output is significantly smoother. To quantify this benefit, a novel Power Smoothing (PS) index is introduced in this work. The PS index achieved by combining floating offshore wind and solar PV is found to be of up to 63%. Beyond the interest of hybrid systems in the case study, the advantages of combining floating wind and solar PV are extensible to other regions where marine renewable energies are being considered.

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