Turning motion of multi-connection cross-flow vertical axis offshore wind turbines tension moored at a single point
Tóm tắt
This study proposes a multi-connection cross-flow vertical axis wind turbine, an innovative device to supply electric power in aquaculture farms. The device is a new type floating offshore wind turbine consisting of two independent wind turbine floats and a mooring float set in a straight line. A single-point mooring system with tension is utilized at the mooring float, which allows the wind turbine floats to turn around the moored point. However, there are various challenges to this new concept for its practical application mainly related to turning motion about the moored point. Therefore, the focus of this study is to understand the turning mechanism of the proposed FOWT through dedicated water tank experiments and numerical simulations. As a concept demonstration, two cross-flow wind turbines were mounted on the wind turbine floats and turning motion characteristics about the moored point were observed. A prototype model was built with a model scale of 1/36 using Froude scaling assuming rough weather conditions at the aquaculture farm. Wind speed of 35 m/s, wave height of 0.75 m, and wave period of 5–7.5 s are the assumed environmental conditions in the actual model. Free yawing tests were conducted in only-wind, only-wave and combined wind–wave conditions. Further, a numerical simulation considering the wind loads acting on the turbines is developed. It is found that the wind turbine floats turn to a position where the wind loads acting on the left and right sides of the moored point are balanced. The numerical simulation reproduced the turning motion within an error of 10.
Tài liệu tham khảo
Alkan S (2017) Comparative hydrodynamic analysis of catenary and tension leg moored floating offshore wind turbine. In: 1st International conference on energy systems engineering, Karabuk, Turkey, 2–4 Nov 2017
Frank RE (1980) Wind machines. The MITRE energy resources and environment series, 2nd edn. Van Nostrand Reinhold Company, New York
Giorgetti S, Pellegrini G, Zanforlin S (2015) Cfd investigation on the aerodynamic interferences between medium-solidity darrieus vertical axis wind turbines. Energy Procedia 14:227–239
Iijima K, Kuroda Y, Nihei Y (2015) Comparison of weathervane performance between two types of fowt systems moored to spm. In: ASME 2015 34th international conference on Ocean, Newfoundland, Canada, 31 May–5 Jun 2015
Iwamatsu S, Nihei Y, Iijima K (2021) Experimental study on the stability performance and turning motion of multi - connection vawt. In: ASME 2021 40th international conference on Ocean, Virtual, Online, 21–30 Jun 2021
Kikuchi Y, Namba H, Ishihara T (2017) A study of dynamic responses of several floating foundation concepts. In: 39th Symposium on wind energy utilization, Tokyo, Japan, 6–7 Dec 2018. https://doi.org/10.11333/jweasympo.39.0_315
Kusanagi K, Srinivasamurthy S, Nihei Y (2018) Slewing effect of twin vertical axis wind turbines supported by a floating platform able to rotate around a single mooring system. In: ASME 2018 37th international conference on Ocean, Madrid, Spain, 17–22 Jun 2018
Maeda H, Hodokawa K, Okunishi S et al (2009) Suppression of red tide by chemicals. Bull Plankton Soc Jpn 56(1):69–73
Masuda K, Nagai T, Gotoh S (1993) Second-order wave exciting forces on column-footing type floating bodies. Proceedings of the Japan Shipbuilding Association, Tokyo, Japan. https://doi.org/10.2534/jjasnaoe1968.1993.174_211
Nakata H (2014) Study of performance of a cross-flow wind turbine located above a roadway fence. Kanazawa University, Kanazawa
Nihei Y, Srinivasamurthy S, Hashimoto K (2020) Influence of slow-drift damping on the weathervaning of single-point moored floating offshore wind turbines. Ocean Eng 217:107899
Philip ID (2012) Investigation of the madaras wind turbine using computational tools. Graduate School of Vanderbilt University, Nashville
Srinivasamurthy S, Iwamatsu S, Hashimoto K et al (2021) Study of slow-drift damping on wind tracking performance of a new-type fowt ‘optiflow’ with single-point mooring. Ocean Eng 242:1110131
Thi TEV, Ko H, Huh J et al (2021) Overview of solar energy for aquaculture: The potential and future trends. Energies 14(21):6923
Ueno T, Nagaya S, Shimizu M (2018) Development and demonstration test for floating type ocean current turbine system conducted in kuroshio current. OCEANS’18 MTS/IEEE Kobe/Techno-Ocean2018, Hyogo, Japan, 28–31 May 2018. https://doi.org/10.1109/OCEANSKOBE.2018.8558792
Verdant Power LLC (2019) Roosevelt island tidal energy project ferc no. p-12611 article 401 rmee plan amendments. Figshare. https://tethys.pnnl.gov/publications/roosevelt-island-tidal-energy-project-ferc-no-p-12611-article-401-rmee-plan-amendments
Yamaguchi H, Imakita A (2018) Learning from field test regarding damping of a floater motion—2MW FOWT “Fukushima Mirai”. Grand Renewable Energy 2018, Yokohama, Japan, 17–22 Dec 2018