| WAN Yong,ZHANG Jie,MENG Junmin,WANG Jing. 2015. A wave energy resource assessment in the China's seas based on multi-satellite merged radar altimeter data. Acta Oceanologica Sinica, 34(3):115－124 |
| A wave energy resource assessment in the China's seas based on multi-satellite merged radar altimeter data |
| 基于多星融合高度计数据的中国海波浪能资源评估 |
| Received:June 20, 2014 Revised:October 11, 2014 |
| DOI：10.1007/s13131-015-0627-6 |
| Key words:China's seas multi-satellite merged altimeter data wave energy resources assessment wave power density |
| 中文关键词: 中国海 多星融合高度计数据 波浪能资源 评估 波功率密度 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | WAN Yong | College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
College of Information and Control Engineering, China University of Petroleum, Qingdao 266580, China | | | ZHANG Jie | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | MENG Junmin | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | WANG Jing | College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China | wjing@ouc.edu.cn |
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| Abstract: |
| Wave energy resources are abundant in both offshore and nearshore areas of the China's seas. A reliable assessment of the wave energy resources must be performed before they can be exploited. First, for a water depth in offshore waters of China, a parameterized wave power density model that considers the effects of the water depth is introduced to improve the calculating accuracy of the wave power density. Second, wave heights and wind speeds on the surface of the China's seas are retrieved from an AVISO multi-satellite altimeter data set for the period from 2009 to 2013. Three mean wave period inversion models are developed and used to calculate the wave energy period. Third, a practical application value for developing the wave energy is analyzed based on buoy data. Finally, the wave power density is then calculated using the wave field data. Using the distribution of wave power density, the energy level frequency, the time variability indexes, the total wave energy and the distribution of total wave energy density according to a wave state, the offshore wave energy in the China's seas is assessed. The results show that the areas of abundant and stable wave energy are primarily located in the north-central part of the South China Sea, the Luzon Strait, southeast of Taiwan in the China's seas; the wave power density values in these areas are approximately 14.0-18.5 kW/m. The wave energy in the China's seas presents obvious seasonal variations and optimal seasons for a wave energy utilization are in winter and autumn. Except for very coastal waters, in other sea areas in the China's seas, the energy is primarily from the wave state with 0.5 m≤Hs≤4 m, 4 s≤Te≤10 s where Hs is a significant wave height and Te is an energy period; within this wave state, the wave energy accounts for 80% above of the total wave energy. This characteristic is advantageous to designing wave energy convertors (WECs). The practical application value of the wave energy is higher which can be as an effective supplement for an energy consumption in some areas. The above results are consistent with the wave model which indicates fully that this new microwave remote sensing method altimeter is effective and feasible for the wave energy assessment. |
| 中文摘要: |
| 中国近海和近岸蕴藏着丰富的波浪能资源,在开发利用波浪能资源之前需要对波浪能资源进行可靠的评估。首先针对中国近海水深的实际情况,引入了一种考虑水深的参数化波功率密度的计算模型,采用该模型以提高波功率密度计算的准确性;其次,利用2009-2013年AVISO多星融合的高度计数据提取了中国近海海浪的有效波高和风速,建立了三种平均波周期的反演模型并反演得到了海浪的能量周期;然后,基于浮标数据研究了波浪能资源的实际应用价值;最后,利用海浪场参数计算了波功率密度,通过波功率密度分布、能级频率、时间变化指数、总波能、总波能密度按波况的分布等指标评估了中国近海的波浪能资源。研究表明,中国近海波能资源富集且稳定的区域主要位于南海中北部海域、吕宋海峡以及台湾东南部海域,年均波功率密度约为14.0-18.5kW/m;波浪能资源有明显的季节变化,秋冬季是波浪能利用的最佳季节;除了极近岸的区域以外,整个中国海波浪能资源的能量主要集中在0.5m≤Hs≤4m,4s≤Te≤10s(Hs是有效波高,Te是能量周期)的波况范围内,该范围内的能量约占总能量的80%以上,这一特性对于波能转换装置的设计是十分有利的;波浪能资源的实际应用价值较高,可作为某些区域能源的有效补充。研究结果与利用模式得到的结果有较好的一致性,充分说明了高度计这种新的微波遥感的手段对于波浪能资源的评估是有效的和可行的。 |
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