Abstract
The dynamics of a novel wave energy converter based on a guided inclined point absorber are investigated. Thereby, it is studied through simulations and experiments whether different inclination angles of the guided point absorber lead to larger motion amplitudes and velocities in regular and irregular waves, from which energy can be harvested. For that, different simulations and experimental setups are analyzed in the presence of wave forcing. In the case of irregular waves a random non-white Gaussian stochastic process based on a sea spectrum is used. It is shown that the inclination angle has a significant influence on the energy harvesting output. Based on this insight, a simple control strategy is introduced in order to further increase the energy harvesting output.
Highlights
There is a huge demand on new sources of renewable energies
In order to illustrate the influence of a changing inclination angle for different wave frequencies ω, RAOs can be computed, which are related to the measured amplitude of the incoming waves and the displacements of the cylindrical floating body (CFB)
It is shown that the position as well as the velocity of the CFB grows if the inclination angle α is changed from α = 90◦ to α = 60◦ and α = 45◦, respectively
Summary
There is a huge demand on new sources of renewable energies. On the one hand, new types of autonomous systems, for example autonomous sensors in the ocean, need an energy source in order to be able to operate autonomously. It is desirable to develop new sources of renewable energy for powering devices or regions which do not have access to a power grid, such as ocean platforms or small islands. Power generated from harvesting emission free renewable energy sources, such as wind or ocean waves, will lead to a better climate. As a result of this difficult task of finding good parameters for two-body WECs, this work analyzes possible improvements of a single-body point absorber based WEC. 2. experimental results of the point absorber in a wave flume are shown for different setups in Sect. 3. Based on the experimental results and parameters, simulations for different setups of the considered point absorber are computed to analyze the corresponding energy harvesting performance in Sect.
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