Marine Hydrokinetic Energy from Western Boundary Currents

被引:27
作者
Bane, John M. [1 ]
He, Ruoying [2 ]
Muglia, Michael [3 ]
Lowcher, Caroline F. [1 ,4 ]
Gong, Yanlin [2 ]
Haines, Sara M. [1 ]
机构
[1] Univ N Carolina, Dept Marine Sci, Chapel Hill, NC 27599 USA
[2] North Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA
[3] Univ N Carolina, Inst Coastal Studies, Wanchese, NC 27891 USA
[4] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA
来源
ANNUAL REVIEW OF MARINE SCIENCE, VOL 9 | 2017年 / 9卷
基金
美国国家科学基金会;
关键词
alternative energy; Gulf Stream; power density; Cape Hatteras; ocean turbine; GULF-STREAM; FLORIDA CURRENT; VARIABILITY; CHARLESTON; SOUTH; FLUCTUATIONS; PROPAGATION; TOPOGRAPHY; DEFLECTION; TRANSPORT;
D O I
10.1146/annurev-marine-010816-060423
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The kinetic energy in ocean currents, or marine hydrokinetic(MHK) energy, is a renewable energy resource that can help meet global energy requirements. An ocean circulation model-based census shows that subtropical surface western boundary currents (WBCs) are the only nearshore, large-scale currents swift enough to drive large electricity-generating ocean turbines envisioned for future use. We review several WBCs in the context of kinetic energy extraction. The power density in the Gulf Stream off North Carolina at times reaches several thousand watts per square meter at 75 m below the surface, and the annual average power is approximately 500-1,000 W m(-2). Significant fluctuations occur with periods of 3-20 days (Gulf Stream meanders) and weeks to months (Gulf Stream path shifts). Interannual variations in annual average power occur because of year-to-year changes in these WBC motions. No large-scale turbines presently exist, and the road to establishing MHK facilities in WBCs will encounter challenges that are similar in many aspects to those associated with the development of offshore wind power.
引用
收藏
页码:105 / 123
页数:19
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