IEA Wind TCP Task 37: Definition of the IEA 15-Megawatt Offshore Reference Wind Turbine

Evan Gaertner, Latha Sethuraman, Benjamin Anderson, Garrett Barter, Nikhar Abbas, Pietro Bortolotti, George Scott, Roland Feil, Matthew Shields, Jennifer Rinker, Frederik Zahle, Fanzhong Meng, Witold Skrzypinski, Henrik Bredmose, Katherine Dykes, Christopher Allen, Anthony Viselli

Research output: NRELTechnical Report


This report describes a 15-megawatt offshore wind turbine with a fixed-bottom monopile support structure. This reference wind turbine is a Class IB direct-drive machine, with a rotor diameter of 240 meters and a hub height of 150 meters. An overview of the design is presented in Figure ES-1 and Table ES-1. The design reflects a joint effort between the National Renewable Energy Laboratory, sponsored by the U.S. Department of Energy, and the Technical University of Denmark, sponsored by the European Union's H2020 Program, through the second work package of International Energy Agency Wind Task 37 on Wind Energy Systems Engineering: Integrated RD&D. A forthcoming report will detail a semisubmersible floating support structure developed by the University of Maine.
Original languageAmerican English
Number of pages54
StatePublished - 2020

NREL Publication Number

  • NREL/TP-5000-75698


  • 15 MW
  • IEA Wind
  • offshore wind
  • reference wind turbine
  • wind energy


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