Wave Energy Absorption by Heaving Point Absorbers at Caspian Sea

سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 255

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شناسه ملی سند علمی:

ISME24_648

تاریخ نمایه سازی: 21 مهر 1398

چکیده مقاله:

The global energy problem is frequently highlighted nowadays. Over the last decades, the energy demand has considerably increased. Although huge amounts of power are available in the ocean waves, wave energy is probably the least-known resource among the renewable energies. Several conversion technologies have been invented, such as overtopping devices, oscillating water columns and point absorber systems. Point absorber systems consist of small buoys oscillating in the ocean waves. By damping their motion, electricity is produced. Due to its geographical location, Iran has long marine boundaries with Caspian Sea. Therefore, it seems more research is required to study Iran’s tidal energy harvesting. In the present study, two different geometries of point absorbers are investigated for this purpose. A linear external damping coefficient is applied to enable power absorption, and a supplementary mass term is introduced to tune the point absorber to the incoming wave conditions. Considering various wave conditions of Caspian Sea, the effects of climate conditions in power absorption are investigated. The effects of the buoy draft and diameter are also studied. It is found thatthe buoys diameter has an impressive influence on the power absorption. In this context, the hydrodynamic parameters are obtained using a boundary element solver package, ANSYS Hydrodynamic. Some numerical simulation results are given to validate our analysis. It is found that there is a good agreement between the obtained results with the other numerical and experimental data.Keywords: Wave energy, Point absorber, Boundary element solver, Caspian Sea.

نویسندگان

Danial Khojasteh

Graduate student, Shiraz University;

Davood Khojastehz

Graduate student, Fars Regional Electric Company

Reza Kamali

Associate Professor, Shiraz University;