原文信息:
Wave-to-Wire Model for an Oscillating Water Column Wave Energy Converter
原文链接:
https://www.sciencedirect.com/science/article/pii/S0306261924020464
Highlights
• 建立了OWC-WtW时域模型,实现了空气透平和发电机之间的全面耦合
• 设计了一个实验并验证了规则波和随机波条件下的数值模型
• 揭示了在OWC装置中发电机的阻尼机制
• 提出的数值模型有效地测量了每个能级中所涉及的参数
Research gap
快速有效的实现了在振荡水柱式波浪能装置中波浪端到发电端的全过程模拟,并实现了空气透平和发电机的双向耦合。
Abstract
Wave energy presents a promising renewable energy resource capable of significantly mitigating the global energy crisis. Among the various wave energy converters (WECs), the Oscillating Water Column (OWC) stands out due to its simple design, reliability, and robust survivability. A numerical model coupling a bi-directional turbine-generator system with the OWC chamber was developed using the Simulink system design software platform. This integrated model achieves comprehensive coupling between the impulse turbine and a three-phase permanent magnet synchronous generator (PMSG). This is accomplished while concurrently maintaining the dynamic characteristics of the multiphase fluid flows and minimizing the unknown parameters influencing the system performance. The Wave-to-Wire (WtW) time-domain model comprises an energy capture chamber, an impulse turbine, and a PMSG, facilitating accurate output power predictions, short calculation times, and complete process coupling. Validation experiments of an OWC positioned at the energy focused point of a parabolic wall, performed using various wave conditions, including regular and irregular waves, demonstrate strong consistency between the numerical and physical models. This study reveals the damping mechanism of the generator on the OWC system, where the generator generates an electromagnetic torque resisting its movement, when driven by mechanical torque. The model evaluates the output power and conversion efficiency each energy conversion stage. When the incident wave height is 0.075m, the average electrical power can reach a maximum of 11.2W, and the overall wave-to-wire conversion efficiency can reach 98% in the particular experimental configuration investigated. The developed predictive model can be used as a valuable tool for designing effective OWC-WEC-WtW systems.
Keywords
Oscillating water column wave energy converters
Wave-to-wire
Impulse turbine
Permanent magnet synchronous generator
Graphics
图1 物理模型试验设置图,(a)&(b)包含弧形墙、浪高仪及OWC气室在内的结构和尺寸示意图,(c)集成了透平的OWC俘能舱,(d)电功率测试仪器及连接示意图
图2 波-电转换全过程的数值模型
图4 各能量级功率及能量级间转换效率示意图
图6 H=0.05 m,R=10 Ω时(a)每个能量级的功率分布,(b)各能量级之间的转换效率
图7 H=0.05 m,R=10 Ω时(a)平均水动力功率P1、平均入射波功率P0和两者间能量转换效率η01,(b)平均电功率P4、平均入射波功率P0以及总能量转换效率η04
作者介绍
本研究由大连理工大学海岸和近海工程国家重点实验室、大连市海洋可再生能源重点实验室的研究人员共同完成。
通信作者简介:
宁德志,博士,教育部特聘教授,国家优青。现任大连理工大学海岸和近海工程国家重点实验室主任,入选辽宁省优秀科技工作者、ELSEVIER中国高被引学者和斯坦福全球前2%顶级科学家榜单等。主持国家自然科学基金、国家重点研发计划项目、教育部、辽宁省科技厅、英国皇家工程院等科研项目。发表SCI收录学术论文160余篇,GOOGLESCHOLAR引用5670余次;出版著作2部。获教育部自然科学奖、海洋工程科学技术奖、亚太近海工程会议突出贡献奖等多项。
第一作者简介:
丁振宇,博士生,大连理工大学海岸和近海工程国家重点实验室,主要从事波浪能装备制造及研发,振荡水柱式波浪能装置的波电转换特性和机电控制的研究。在Applied Energy、Coastal Engineering和Journal of Fluid Mechanics等期刊发表论文4篇,授权发明专利及国际专利3项。
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