Presentations

Abstract

This project explores the feasibility of repurposing existing offshore infrastructure—specifically monopile foundations and electrical equipment—as an alternative to full decommissioning of offshore wind farms. The aim is to enable hybrid renewable energy generation (wave and tidal energy, floating solar PV) and energy storage technologies, thereby reducing capital costs, extending infrastructure lifespan, and accelerating the energy transition. Reusing installed components also minimizes environmental impact and regulatory complexity. The project is structured into three work packages: • WP1 reviews current technologies and applies a Multi-Criteria Decision Analysis (MCDA) to evaluate options based on constructability, operability, energy potential, business case, technology readiness level (TRL), and legal/environmental readiness. It includes a preliminary legislative screening and gap analysis. • WP2 conducts a feasibility study, assessing energy resources, constructability, operability, legal requirements, and environmental impact. It also develops a business case, including the Levelized Cost of Energy (LCOE) to evaluate economic viability. • WP3 focuses on technical validation through hydrodynamic testing at the Coastal & Ocean Basin in Oostende, and assesses the structural reliability of monopiles, including fatigue analysis of secondary steel and new connection designs. Preliminary results: the Multi-Criteria Decision Analysis (MCDA) conducted within the project identified tidal kite systems (e.g., Seaqurrent, Minesto) and wave energy converters (e.g., Wavehexapod, Wave Star, Sigma Energy) as the most promising technologies. To strengthen the overall business case, the integration of floating solar and energy storage solutions is also being explored. A review of relevant legislation and permitting processes has yielded positive indications, suggesting alignment with industry needs and national energy strategies. In this final phase of the project, partners are focusing on evaluating the economic and financial viability of the proposed repurposing and integrated energy concept design.