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Abstract
Wave energy has the advantages of high energy density, renewability, and wide distribution, and has been highly valued by many coastal countries. The wave energy conversion device can convert wave energy into electric energy, which is of great significance for alleviating problems such as energy crisis and greenhouse effect. The traditional wave energy conversion device can only gain the energy along the heave direction, and the kinetic energy of the buoy is not fully utilized. To improve the energy utilization efficiency of the wave energy conversion device, this paper proposed a new type of 3-SPS wave energy conversion device. Based on linear waves and Lagrangian equation, a hydrodynamic model of the device was established. The displacement and velocity of the device float under the action of linear waves were analyzed. The results show that the 3-SPS wave energy conversion device can collect the kinetic energy of the buoy in its heaving, surging and pitching movement at the same time; the kinetic energy of the buoy in the heaving direction is much greater than the kinetic energy in the surging and pitching directions; the buoy can capture kinetic energy in multiple directions of motion, indicating that the 3-SPS wave energy conversion device has a high energy utilization efficiency. This paper provides some useful references for the optimal design of the new wave energy device.
Highlights
As a kind of clean energy, wave energy has the characteristics of large reserves, high energy flow density, wide distribution, and easy conversion of energy forms [1], and has been highly valued by many coastal countries
This paper proposed a new type of 3-SPS wave energy conversion device, which can collect the energy in the heaving, surging and pitching directions at the same time
A hydrodynamic model of the 3-SPS wave energy conversion device under the action of linear waves was established. This hydrodynamic model needs to consider the mutual coupling between rigid body dynamics and fluid dynamics
Summary
As a kind of clean energy, wave energy has the characteristics of large reserves, high energy flow density, wide distribution, and easy conversion of energy forms [1], and has been highly valued by many coastal countries. China is a large maritime country with a total coastline of more than 32,000 kilometers, and the usable wave energy is very abundant [2,3]. Research on wave energy power generation technology is of great significance for ensuring energy security, maintaining sustainable economic and social development, and enhancing the international competitiveness of marine technology in China. The buoy-type wave energy conversion device is one of the research hotspots in the field of wave energy power generation technology [7,8,9]. The traditional single-degree-of-freedom wave energy conversion device only collects the energy of the buoy
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