Exploitable wave energy assessment based on ERA-Interim reanalysis data-A case study in the East China Sea and the South China Sea

doi:10.1007/s13131-015-0641-8

	Exploitable wave energy assessment based on ERA-Interim reanalysis data-A case study in the East China Sea and the South China Sea
	Wan Yong 1,2,3; Zhang Jie 2; Meng Junmin 2; Wang Jing 1
刊名	ACTA OCEANOLOGICA SINICA
	2015-09
卷号	34 期号:9 页码:143-155
关键词	wave energy assessment ERA-Interim reanalysis data exploitable wave energy theoretical wave energy wave power density high sea state
ISSN号	0253-505X
DOI	10.1007/s13131-015-0641-8
英文摘要	Wave energy resources assessment is a very important process before the exploitation and utilization of the wave energy. At present, the existing wave energy assessment is focused on theoretical wave energy conditions for interesting areas. While the evaluation for exploitable wave energy conditions is scarcely ever performed. Generally speaking, the wave energy are non-exploitable under a high sea state and a lower sea state which must be ignored when assessing wave energy. Aiming at this situation, a case study of the East China Sea and the South China Sea is performed. First, a division basis between the theoretical wave energy and the exploitable wave energy is studied. Next, based on recent 20 a ERA-Interim wave field data, some indexes including the spatial and temporal distribution of wave power density, a wave energy exploitable ratio, a wave energy level, a wave energy stability, a total wave energy density, the seasonal variation of the total wave energy and a high sea condition frequency are calculated. And then the theoretical wave energy and the exploitable wave energy are compared each other; the distributions of the exploitable wave energy are assessed and a regional division for exploitable wave energy resources is carried out; the influence of the high sea state is evaluated. The results show that considering collapsing force of the high sea state and the utilization efficiency for wave energy, it is determined that the energy by wave with a significant wave height being not less 1 m or not greater than 4 m is the exploitable wave energy. Compared with the theoretical wave energy, the average wave power density, energy level, total wave energy density and total wave energy of the exploitable wave energy decrease obviously and the stability enhances somewhat. Pronounced differences between the theoretical wave energy and the exploitable wave energy are present. In the East China Sea and the South China Sea, the areas of an abundant and stable exploitable wave energy are primarily located in the north-central part of the South China Sea, the Luzon Strait, east of Taiwan, China and north of Ryukyu Islands; annual average exploitable wave power density values in these areas are approximately 10-15 kW/m; the exploitable coefficient of variation (COV) and seasonal variation (SV) values in these areas are less than 1.2 and 1, respectively. Some coastal areas of the Beibu Gulf, the Changjiang Estuary, the Hangzhou Bay and the Zhujiang Estuary are the poor areas of the wave energy. The areas of the high wave energy exploitable ratio is primarily in nearshore waters. The influence of the high sea state for the wave energy in nearshore waters is less than that in offshore waters. In the areas of the abundant wave energy, the influence of the high sea state for the wave energy is prominent and the utilization of wave energy is relatively difficult. The developed evaluation method may give some references for an exploitable wave energy assessment and is valuable for practical applications.
资助项目	National Natural Science Foundation of China (NSFC)[41176157]
WOS关键词	WIND ENERGY ; RESOURCES ; HINDCAST
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000360819600017
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26192]
专题	自然资源部第一海洋研究所
通讯作者	Wang Jing
作者单位	1.Ocean Univ China, Coll Informat Sci & Engn, Qingdao 266100, Peoples R China 2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 3.China Univ Petr, Coll Informat & Control Engn, Qingdao 266580, Peoples R China
推荐引用方式 GB/T 7714	Wan Yong,Zhang Jie,Meng Junmin,et al. Exploitable wave energy assessment based on ERA-Interim reanalysis data-A case study in the East China Sea and the South China Sea[J]. ACTA OCEANOLOGICA SINICA,2015,34(9):143-155.
APA	Wan Yong,Zhang Jie,Meng Junmin,&Wang Jing.(2015).Exploitable wave energy assessment based on ERA-Interim reanalysis data-A case study in the East China Sea and the South China Sea.ACTA OCEANOLOGICA SINICA,34(9),143-155.
MLA	Wan Yong,et al."Exploitable wave energy assessment based on ERA-Interim reanalysis data-A case study in the East China Sea and the South China Sea".ACTA OCEANOLOGICA SINICA 34.9(2015):143-155.