A Simple Nozzle-Diffuser Duct Used as a Kuroshio Energy Harvester
A Simple Nozzle-Diffuser Duct Used as a Kuroshio Energy Harvester
复制标题
用作黑潮能量收集器的简单喷嘴扩散器管道
作者：
P. Yeh;Shang;Wei;S. Wu;Meng;Bang Chen
因应台湾日益增加的能源需求，以及全球可再生能源发展的趋势，黑潮能源是一种极具潜力的能源。如何开采这一宝贵的自然资源已成为工程实践中一个有趣而重要的问题。本研究报告的结果的可行性研究的一个湍流扩散管（NDD）作为黑潮电流能量采集器。利用计算流体力学软件ANSYS Fluent计算了海底管道的阻力系数和附加质量系数。这些系数被进一步导入Orcaflex，以模拟正常和风暴波条件下的管道运动。结果表明，在正常波浪条件下，导管在海面以下25 m处是稳定的。当波浪条件变为风暴波时，导管需要潜入海面以下至少90 m处以恢复其稳定性并获得高功率起飞（PTO）。最后，本文提出了一种优化设计的扩散器-导流管，并在黑潮中获得了15 kW的PTO峰值。一旦一个合适的海上平台可以开发与六十六个NDD，兆瓦级黑潮洋流发电系统是可行的，在不久的将来。
In response to the increasing energy demand in Taiwan and the global trend of renewable energy development, Kuroshio energy is a potential energy source. How to extract this invaluable natural resource has then become an intriguing and important question in engineering practices. This study reported the results of a feasibility study for a nozzle-diffuser duct (NDD) as the Kuroshio currents energy harvester. The computational fluid dynamics (CFD) software ANSYS Fluent was employed to calculate the drag and added mass coefficients of the duct anchored to the seabed. Those coefficients were further imported into Orcaflex to simulate the motion of the duct under normal and storm wave conditions. Results showed that the duct was stable 25 m below the sea surface under normal wave conditions. When the wave condition changed to storm waves, the duct needed to dive into at least 90 m below the sea surface to regain its stability and obtain high power take-off (PTO). An optimal design nozzle-diffuser-duct was reported, and a PTO peak of 15 kW was expectable in the Kuroshio currents. Once a suitable offshore platform can be developed with sixty-six NDDs, a Megawatt Kuroshio ocean current power generation system is feasible in the near future.