0
Technical Briefs

At Sea Experiment of a Hybrid Spar for Floating Offshore Wind Turbine Using 1/10-Scale Model

[+] Author and Article Information
Tomoaki Utsunomiya

Associate Professor
e-mail: utsunomiya.tomoaki.4m@kyoto-u.ac.jp

Shintaro Minoura

Department of Civil and Earth Resources Engineering,
Kyoto University,
Nishikyo-ku,
Kyoto 615-8540, Japan

Hideki Hamamura

Sasebo Heavy Industries,
Nihonbashihamacho 2-31-1,
Chuo-ku,
Tokyo 103-0007, Japan

Iku Sato

Toda Corporation,
Kyobashi 1-7-1,
Chuo-ku,
Tokyo 104-8388, Japan

Kentaro Yasui

Nippon Hume Corporation,
Shinbashi 5-33-11,
Minato-ku,
Tokyo 105-0004, Japan

Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received June 2, 2010; final manuscript received March 28, 2013; published online June 6, 2013. Assoc. Editor: Sergio H. Sphaier.

J. Offshore Mech. Arct. Eng 135(3), 034503 (Jun 06, 2013) (8 pages) Paper No: OMAE-10-1051; doi: 10.1115/1.4024148 History: Received June 02, 2010; Revised March 28, 2013

This study aims at development of a cost-effective, floating offshore wind turbine. The prototype model considered herein is composed of (1) 2-MW horizontal-axis wind turbine (HAWT) of downwind type, (2) steel monotower with 55-m hub height above sea level, (3) steel-prestressed concrete (PC) hybrid SPAR-type foundation with 70-m draft, and (4) catenary mooring system using anchor chains. In order to demonstrate the feasibility of the concept, an at-sea experiment using a 1/10-scale model of the prototype has been made. The demonstrative experiment includes (1) construction of the hybrid SPAR foundation using PC and steel, the same as the prototype; (2) dry-towing and installation to the at-sea site at 30-m distance from the quay of the Sasebo shipbuilding yard; (3) generating electric power using a 1 kW HAWT; and (4) removal from the site. During the at-sea experiment, wind speed, wind direction, tidal height, wave height, motion of the SPAR, tension in a mooring chain, and strains in the tower and the SPAR foundation have been measured. Motion of the SPAR has been numerically simulated and compared with the measured values, where basically good agreement is observed.

Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.

References

Nielsen, F. G., Hanson, T. D., and Skaare, B., 2006, “Integrated Dynamic Analysis of Floating Offshore Wind Turbines,” Proceedings of 25th International Conference on Offshore Mechanics and Arctic Engineering, Hamburg, Germany, Paper No. OMAE2006-92291.
Skaare, B., Hanson, T. D., Nielsen, F. G., Yttervik, R., Hansen, A. M., Thomsen, K., and Larsen, T. J., 2007, “Integrated Dynamic Analysis of Floating Offshore Wind Turbines,” European Wind Energy Conference and Exhibition, Milan, EWEA, Brussels, May 7–10.
Roddier, D., Cermelli, C., and Weinstein, A., 2009, “Windfloat: A Floating Foundation for Offshore Wind Turbines. Part I: Design Basis and Qualification Process,” Proceedings of 28th International Conference on Ocean, Offshore and Arctic Engineering, Honolulu, HI, Paper No. OMAE2009-79229.
Cermelli, C., Roddier, D., and Aubault, A., 2009, “Windfloat: A Floating Foundation for Offshore Wind Turbines. Part II: Hydrodynamics Analysis,” Proceedings of 28th International Conference on Ocean, Offshore and Arctic Engineering, Honolulu, HI, Paper No. OMAE2009-79231.
Aubault, A., Cermelli, C., and Roddier, D., 2009, “Windfloat: A Floating Foundation for Offshore Wind Turbines. Part III: Structural Analysis,” Proceedings of 28th International Conference on Ocean, Offshore and Arctic Engineering, Honolulu, HI, Paper No. OMAE2009-79232.
Jonkman, J. M., and Sclavounos, P. D., 2006, “Development of Fully Coupled Aeroelastic and Hydrodynamic Models for Offshore Wind Turbines,” National Renewable Energy Laboratory, Golden, Colorado, Report No. NREL/CP-500-39066.
Utsunomiya, T., Nishida, E., and Sato, I., 2009, “Wave Response Experiment on SPAR-Type Floating Bodies for Offshore Wind Turbine,” Proceedings of the 19th International Offshore and Polar Engineering Conference, Osaka, Japan, Vol. 1, pp. 378–383.
Utsunomiya, T., Sato, T., Matsukuma, H., and Yago, K., 2009, “Experimental Validation for Motion of a Spar-Type Floating Offshore Wind Turbine Using 1/22.5 Scale Model,” Proceedings of 28th International Conference on Ocean, Offshore and Arctic Engineering, Honolulu, HI, Paper No. OMAE2009-79695.
Matsukuma, H., and Utsunomiya, T., 2008, “Motion Analysis of a Floating Offshore Wind Turbine Considering Rotor-rotation,” IES J., Part A: Civ. Struct. Eng., 1(4), pp. 268–279. [CrossRef]
Sarpkaya, T., 2010, Wave Forces on Offshore Structures, Cambridge University, Cambridge, UK.
Germanischer Lloyd, 2005, Guideline for the Certification of Offshore Wind Turbines, 2005 ed., Germanischer Lloyd, Hamburg, Germany.
Utsunomiya, T., Yoshida, S., Ookubo, H., Sato, I., and Ishida, S., 2012, “Dynamic Analysis of a Floating Offshore Wind Turbine Under Extreme Environmental Conditions,” Proceedings of 31st International Conference on Ocean, Offshore and Arctic Engineering, Rio de Janeiro, Brazil, Paper No. OMAE2012-83985.

Figures

Grahic Jump Location
Fig. 1

CG of the prototype FOWT model

Grahic Jump Location
Fig. 2

Experimental model

Grahic Jump Location
Fig. 3

Setup of the 1/10-scale model on sea

Grahic Jump Location
Fig. 4

Coordinate system and anchor chain arrangement

Grahic Jump Location
Fig. 5

Time series of roll and pitch responses

Grahic Jump Location
Fig. 6

Power spectrum of roll and pitch responses

Grahic Jump Location
Fig. 7

Time series of tension in anchor chain No. 1

Grahic Jump Location
Fig. 8

Power spectrum of tension in anchor chain No. 1

Grahic Jump Location
Fig. 9

Wind load at hub height

Grahic Jump Location
Fig. 12

Power spectrum for wave height

Grahic Jump Location
Fig. 13

Power spectrum for roll motion

Grahic Jump Location
Fig. 14

Power spectrum for pitch motion

Grahic Jump Location
Fig. 15

Power spectrum for yaw velocity

Grahic Jump Location
Fig. 16

Power spectrum for tension in anchor chain No. 1

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In