{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T01:09:11Z","timestamp":1772672951631,"version":"3.50.1"},"posted":{"date-parts":[[2026]]},"group-title":"SSRN","reference-count":58,"publisher":"Elsevier BV","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>\u200bCo-locating floating offshore wind turbines with wave energy converters can reduce costs, enhance power stability, and improve the spatial efficiency of offshore renewable energy developments. However, most existing studies assess hybrid systems at single sites or without accounting for long-term variability, spatial constraints or techno-economic interactions across broad marine regions. This work introduces a spatially explicit techno-economic assessment framework for co-located floating wind\u2013wave energy farms that integrates multi-decadal metocean hindcasts, multi-criteria site selection, device-scale operational modelling, hybrid variability metrics, and cost modelling. The framework is demonstrated using a 510 MW hybrid farm evaluated across the mainland Portuguese offshore region, drawing on 45 years of SWAN- and ERA5-derived wave and wind conditions. At each feasible location, the method computes annual energy production, capacity factor, non-operational time, complementarity indicators, levelized cost of energy (LCoE), and a composite variability index. These metrics are synthesized using K-means clustering to identify spatial regimes of hybrid performance, variability reduction and economic feasibility. Results show that wave energy provides nearly continuous availability, substantially reducing zero-generation events, while wind contributes most of the variability and downtime. Offshore areas off central and northern Portugal achieve the strongest hybrid performance, with high combined capacity factors and the lowest LCoE values (\u224860\u201390 \u20ac\/MWh). The clustering analysis identifies three techno-economic hybrid classes that capture the interplay among resource quality, complementarity and cost. Beyond the case study, the methodology offers a transferable framework for early-stage planning of hybrid offshore renewable energy systems, supporting marine spatial planning, technology selection and strategic investment.<\/jats:p>","DOI":"10.2139\/ssrn.6346303","type":"posted-content","created":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T00:38:13Z","timestamp":1772671093000},"source":"Crossref","is-referenced-by-count":0,"title":["A spatial techno-economic assessment framework for co-located floating wind and wave energy farms"],"prefix":"10.2139","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0006-5843","authenticated-orcid":true,"given":"Ajab Gul","family":"Majidi","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6867-5993","authenticated-orcid":true,"given":"Esmaeil","family":"Zavvar","sequence":"additional","affiliation":[]},{"given":"Daniel","family":"Clemente","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6458-8996","authenticated-orcid":true,"given":"Jose Eduardo","family":"Carneiro-Barros","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3768-3314","authenticated-orcid":true,"given":"Paulo","family":"Rosa-Santos","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7876-6423","authenticated-orcid":true,"given":"Luciana  das","family":"Neves","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4337-8428","authenticated-orcid":true,"given":"Francisco","family":"Taveira-Pinto","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9042-6851","authenticated-orcid":true,"given":"Adem","family":"Akpinar","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5507-0995","authenticated-orcid":true,"given":"Victor","family":"Ramos","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"ref1","doi-asserted-by":"crossref","DOI":"10.1016\/j.oceaneng.2023.115451","article-title":"The impact of climate change on the wave energy resource potential of the Atlantic Coast of Iberian Peninsula","volume":"284","author":"A G Majidi","year":"2023","journal-title":"Ocean Eng"},{"key":"ref2","article-title":"The momentum of the solar energy transition","volume":"14","author":"Fjmm Nijsse","year":"2023","journal-title":"Nat Commun"},{"key":"ref3","author":"A Borriello","year":"2025","journal-title":"The EU Blue Economy Report"},{"key":"ref4","first-page":"191","article-title":"Power Production Performance of Different Wave Energy Converters in the Southwestern Black-Sea","volume":"14","author":"A G Majidi","year":"2020","journal-title":"Energy Power Eng"},{"key":"ref5","doi-asserted-by":"crossref","first-page":"705","DOI":"10.1016\/j.renene.2020.12.092","article-title":"Downscaling wave energy converters for optimum performance in low-energy seas","volume":"168","author":"A Majidi","year":"2021","journal-title":"Renew. Energy"},{"key":"ref6","year":"2025","journal-title":"International Renewable Energy Agency. Renewable Energy Statistics"},{"key":"ref7","year":"2026"},{"key":"ref8","doi-asserted-by":"crossref","DOI":"10.1016\/j.apenergy.2025.125422","article-title":"Development of a multi-criteria decision-making tool for combined offshore wind and wave energy site selection","volume":"384","author":"A G Majidi","year":"2025","journal-title":"Appl. Energy"},{"key":"ref9","doi-asserted-by":"crossref","DOI":"10.1016\/j.energy.2019.116357","article-title":"Global levelised cost of electricity from offshore wind","volume":"189","author":"J Bosch","year":"2019","journal-title":"Energy"},{"key":"ref10","year":"2026","journal-title":"Offshore Renewables: An Action Agenda for Deployment 2021"},{"key":"ref11","doi-asserted-by":"crossref","DOI":"10.3390\/en13226150","article-title":"Floating Offshore Renewable Energy Farms. A Life-Cycle Cost Analysis at Brindisi, Italy","volume":"13","author":"D Pantusa","year":"2020","journal-title":"Energies"},{"key":"ref12","doi-asserted-by":"crossref","first-page":"714","DOI":"10.1016\/j.renene.2014.01.017","article-title":"Levelised cost of energy for offshore floating wind turbines in a life cycle perspective","volume":"66","author":"A Myhr","year":"2014","journal-title":"Renew. Energy"},{"key":"ref13","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pone.0215010","article-title":"Multi-use of the sea: A wide array of opportunities from site-specific cases across Europe","volume":"14","author":"M Bocci","year":"2019","journal-title":"PLOS ONE"},{"key":"ref14","author":"E M Blech","year":"2023","journal-title":"Developing a cost model For combined offshore farms : The advantages of co-located wind and wave energy"},{"key":"ref15","doi-asserted-by":"crossref","DOI":"10.3390\/su13158159","article-title":"Multi-Use of the Sea as a Sustainable Development Instrument in Five EU Sea Basins","volume":"13","author":"J Przedrzymirska","year":"2021","journal-title":"Sustainability"},{"key":"ref16","doi-asserted-by":"crossref","first-page":"552","DOI":"10.1109\/JOE.2011.2167198","article-title":"Reducing Offshore Transmission Requirements by Combining Offshore Wind and Wave Farms","volume":"36","author":"E D Stoutenburg","year":"2011","journal-title":"IEEE Journal of Oceanic Engineering"},{"key":"ref17","doi-asserted-by":"crossref","first-page":"837","DOI":"10.1016\/j.renene.2015.05.028","article-title":"Co-located wave-wind farms: Economic assessment as a function of layout","volume":"83","author":"S Astariz","year":"2015","journal-title":"Renew. Energy"},{"key":"ref18","doi-asserted-by":"crossref","DOI":"10.1016\/j.energy.2024.132944","article-title":"Integrated assessment of offshore wind and wave power resources in mainland Portugal","volume":"308","author":"A G Majidi","year":"2024","journal-title":"Energy"},{"key":"ref19","doi-asserted-by":"crossref","DOI":"10.1016\/j.oceaneng.2023.116449","article-title":"Multi-objective decision tool for the assessment of co-located wave-wind offshore floating energy parks","volume":"292","author":"F Teixeira-Duarte","year":"2024","journal-title":"Ocean Eng"},{"key":"ref20","first-page":"281","volume":"5","author":"T Calheiros-Cabral","year":"2022","journal-title":"Development and Assessment of a Hybrid Breakwater-Integrated Wave Energy Converter. International Marine Energy Journal"},{"key":"ref21","article-title":"Application of Marine Spatial Planning tools for tidal stream farm micro-siting","volume":"220","author":"M \ufffdlvarez","year":"2022","journal-title":"Ocean Coast. Manage"},{"key":"ref22","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1016\/j.apenergy.2014.08.068","article-title":"A tool for combined WEC-site selection throughout a coastal region: Rias Baixas","volume":"135","author":"R Carballo","year":"2014","journal-title":"NW Spain. Appl. Energy"},{"key":"ref23","doi-asserted-by":"crossref","DOI":"10.1016\/j.jcsr.2024.108994","article-title":"Optimal probability distribution for SCFmax in KT-joints strengthened with concrete in wind turbine support structures","volume":"222","author":"E Zavvar","year":"2024","journal-title":"Journal of Constructional Steel Research"},{"key":"ref24","doi-asserted-by":"crossref","DOI":"10.1016\/j.renene.2025.122362","article-title":"Multi-objective optimization of co-located wave-wind farm layouts supported by genetic algorithms and numerical models","volume":"241","author":"F Teixeira-Duarte","year":"2025","journal-title":"Renew. Energy"},{"key":"ref25","doi-asserted-by":"crossref","first-page":"1018","DOI":"10.1016\/j.renene.2021.12.120","article-title":"Quantifying the reduction in power variability of co-located offshore wind-wave farms","volume":"185","author":"S Rasool","year":"2022","journal-title":"Renew. Energy"},{"key":"ref26","doi-asserted-by":"crossref","DOI":"10.1016\/j.energy.2023.127176","article-title":"Co-located windwave farms: Optimal control and grid integration","volume":"272","author":"Del Pozo Gonzalez","year":"2023","journal-title":"Energy"},{"key":"ref27","doi-asserted-by":"crossref","first-page":"866","DOI":"10.1016\/j.renene.2016.06.016","article-title":"Cost assessment methodology for combined wind and wave floating offshore renewable energy systems","volume":"97","author":"L Castro-Santos","year":"2016","journal-title":"Renew. Energy"},{"key":"ref28","doi-asserted-by":"crossref","first-page":"885","DOI":"10.1016\/j.renene.2018.08.043","article-title":"An analytical cost model for co-located floating wind-wave energy arrays","volume":"132","author":"C E Clark","year":"2019","journal-title":"Renew. Energy"},{"key":"ref29","doi-asserted-by":"crossref","DOI":"10.3390\/jmse10020267","article-title":"Assessing the Effectiveness of a Novel WEC Concept as a Co-Located Solution for Offshore Wind Farms","volume":"10","author":"V Ramos","year":"2022","journal-title":"J. Mar. Sci. Eng"},{"key":"ref30","doi-asserted-by":"crossref","first-page":"497","DOI":"10.1016\/j.energy.2016.07.069","article-title":"Co-located wind and wave energy farms: Uniformly distributed arrays","volume":"113","author":"S Astariz","year":"2016","journal-title":"Energy"},{"key":"ref31","doi-asserted-by":"crossref","first-page":"599","DOI":"10.1016\/j.enconman.2016.05.078","article-title":"Selecting optimum locations for co-located wave and wind energy farms. Part II: A case study","volume":"122","author":"S Astariz","year":"2016","journal-title":"Energy Convers. Manage"},{"key":"ref32","doi-asserted-by":"crossref","DOI":"10.1016\/j.energy.2020.118845","article-title":"Evaluation of the annual electricity production of a hybrid breakwater-integrated wave energy converter","volume":"213","author":"T Calheiros-Cabral","year":"2020","journal-title":"Energy"},{"key":"ref33","article-title":"An Integrated Approach to Assessing the Wave Potential for the Energy Supply of Ports: A Case Study","volume":"10","author":"V Ramos","year":"1989","journal-title":"J. Mar. Sci. Eng"},{"key":"ref34","doi-asserted-by":"crossref","DOI":"10.1016\/j.apenergy.2024.123119","article-title":"Techno-economic assessment of global and regional wave energy resource potentials and profiles in hourly resolution","volume":"364","author":"R Satymov","year":"2024","journal-title":"Appl. Energy"},{"key":"ref35","doi-asserted-by":"crossref","first-page":"2001","DOI":"10.5194\/wes-9-2001-2024","article-title":"Converging profile relationships for offshore wind speed and turbulence intensity","volume":"9","author":"G Jeans","year":"2024","journal-title":"Wind Energy Sci"},{"key":"ref36","doi-asserted-by":"crossref","first-page":"1999","DOI":"10.1002\/qj.3803","article-title":"The ERA5 global reanalysis","volume":"146","author":"H Hersbach","year":"2020","journal-title":"Q. J. R. Meteorol. Soc"},{"key":"ref37","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1016\/j.joes.2019.07.003","article-title":"Application of SWAN model for storm generated wave simulation in the Canadian Beaufort Sea","volume":"5","author":"M A Hoque","year":"2020","journal-title":"J. Ocean Eng. Sci"},{"key":"ref38","doi-asserted-by":"crossref","DOI":"10.1016\/j.apor.2021.102962","article-title":"Spatial calibration of an unstructured SWAN model forced with CFSR and ERA5 winds for the Black and Azov Seas","volume":"117","author":"K Amarouche","year":"2021","journal-title":"Appl. Ocean Res"},{"key":"ref39","doi-asserted-by":"crossref","first-page":"809","DOI":"10.1016\/j.renene.2021.01.057","article-title":"Inter-and intra-annual wave energy resource assessment in the south-western Black Sea coast","volume":"169","author":"B Bing\ufffdlbali","year":"2021","journal-title":"Renew. Energy"},{"key":"ref40","author":"M Zijlema","year":"2021"},{"key":"ref41","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1016\/j.coastaleng.2009.10.011","article-title":"Computation of wind-wave spectra in coastal waters with SWAN on unstructured grids","volume":"57","author":"M Zijlema","year":"2010","journal-title":"Coastal Eng"},{"key":"ref42","article-title":"Assessing the impact of wave model calibration in the uncertainty of wave energy estimation","author":"A G Majidi","year":"2023","journal-title":"Renew. Energy"},{"key":"ref43","first-page":"331","volume":"2","author":"P Weatherall","year":"2015","journal-title":"A new digital bathymetric model of the world's oceans"},{"key":"ref44","author":"A Mazzolari","year":"2013","journal-title":"Two dimensional unstructured mesh generation applied to shallow water models"},{"key":"ref45","article-title":"Techno-Economic Assessment of a Hybrid Offshore Wind-Wave Farm: Case Study in Norway","volume":"16","author":"J R\ufffdnkk\ufffd","year":"2023","journal-title":"Energies"},{"key":"ref46","doi-asserted-by":"crossref","DOI":"10.1016\/j.energy.2020.119705","article-title":"Wave power performance of wave energy converters at high-energy areas of a semi-enclosed sea","volume":"220","author":"A G Majidi","year":"2021","journal-title":"Energy"},{"key":"ref47","doi-asserted-by":"crossref","DOI":"10.1016\/j.apenergy.2024.124950","article-title":"Assessment of electricity production and coastal protection of a nearshore 500 MW wave farm in the north-western Portuguese coast","volume":"379","author":"D Clemente","year":"2025","journal-title":"Appl. Energy"},{"key":"ref48","doi-asserted-by":"crossref","first-page":"807","DOI":"10.5194\/wes-8-807-2023","article-title":"Design optimization of offshore wind jacket piles by assessing support structure orientation relative to metocean conditions","volume":"8","author":"M M Mroczek","year":"2023","journal-title":"Wind Energy Sci"},{"key":"ref49","doi-asserted-by":"crossref","DOI":"10.1038\/s41598-026-35701-4","article-title":"A linear programming model for power system planning with hydrogen integration","volume":"16","author":"I Zaiter","year":"2026","journal-title":"Sci Rep"},{"key":"ref50","doi-asserted-by":"crossref","DOI":"10.2172\/1603478","author":"E Gaertner","year":"2020","journal-title":"Definition of the IEA 15-MW offshore reference wind turbine"},{"key":"ref51","article-title":"Power performance and dynamic characteristics of a 15 MW floating wind turbine with wave energy converter combined concept","volume":"13","author":"X Gu","year":"2025","journal-title":"Sustainable Horizons"},{"key":"ref52","article-title":"Assessing global land-based solar-wind complementarity using high-resolution climate reanalysis for hybrid renewable energy design","volume":"343","author":"W-B Chen","year":"2025","journal-title":"Energy Convers. Manage"},{"key":"ref53","article-title":"Techno-economic assessment of offshore wind and hybrid wind-wave farms with energy storage systems","volume":"192","author":"Q Gao","year":"2024","journal-title":"Renew. Sustain. Energy Rev"},{"key":"ref54","article-title":"Wave energy resource classification based on multivariate clustering for the Mediterranean and Black Sea","volume":"341","author":"V Kutupo?lu","year":"2025","journal-title":"Energy"},{"key":"ref55","doi-asserted-by":"crossref","DOI":"10.1016\/j.apenergy.2020.114515","article-title":"A classification system for global wave energy resources based on multivariate clustering","volume":"262","author":"I Fairley","year":"2020","journal-title":"Appl. Energy"},{"key":"ref56","doi-asserted-by":"crossref","DOI":"10.3390\/en18205452","article-title":"Mapping Solar-Wind Complementarity with BARRA","volume":"18","author":"A Prasad","year":"2025","journal-title":"Energies"},{"key":"ref57","doi-asserted-by":"crossref","DOI":"10.1016\/j.renene.2025.122540","article-title":"Power production assessment of wave energy converters in mainland Portugal","volume":"243","author":"A G Majidi","year":"2025","journal-title":"Renew. Energy"},{"key":"ref58","article-title":"Wave Energy Conversion to Decarbonize Offshore Aquaculture: Multi-Level Techno-Economic Analysis for a Case Study in Peniche","volume":"18","author":"M Bertrand","year":"2025","journal-title":"Portugal. Energies"}],"container-title":[],"original-title":[],"deposited":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T00:41:20Z","timestamp":1772671280000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ssrn.com\/abstract=6346303"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":58,"URL":"https:\/\/doi.org\/10.2139\/ssrn.6346303","relation":{},"subject":[],"published":{"date-parts":[[2026]]},"subtype":"preprint"}}