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- Journal Article:
Pizer
… evaluate the maximum power that can be absorbed from a linear three-dimensional multi-degree-of-freedom system. A weighted global constraint is imposed on the system's excursions to ensure that the assumptions of linear theory remain valid. The numerical solution gives good agreement with known semi-analytical results for the case of a heaving hemisphere. A surging hemisphere is also studied, from which the relative merits of …
- Journal Article:
Bailey and Bryden
… energy converter. The power take-off uses the relative velocity between the main structure of the wave energy converter and an inertial referenced mass contained within its outer envelope. The power take-off consists of a linear spring and a quadratic damper. In this paper the mathematical principles behind a working time domain simulation of a non-linear power take-off as applied to a relative motion inertial referenced wave energy …
- Thesis:
Child
… In this thesis, certain issues relating to a number of wave energy absorbers operating in the same vicinity are investigated. Specifically, arrangements of the devices within such an array are sought, such that beneficial hydrodynamic interference between members is exploited and unwanted effects mitigated. Arrays of ‘point absorber’ devices as well as converters with multiple closely spaced floats are …
- Conference Paper:
Bailey and Bryden
… effect that a mono-directional Power Take Off (PTO) has on the motions and power extraction of a Wave Energy Converter (WEC). A mono-directional damper is one where the resisting force only operates in one direction. The model comprises of a cylinder that is restrained to move in heave, reacting against an internal mass (also … mono-directional damper in parallel. This paper presents experimental results for a variety of different damping constants for mono-directional dampers which operate in both in expansion …
- Journal Article:
Potapenko et al.
… Two different concepts of wave energy converter coupled to the novel C-GEN linear generator have been studied numerically, including the evaluation of different buoy sizes. The first concept has a slack connection between the buoy and the … system with active rectification. The radiation forces originating from the oscillatory motion of the buoy have been approximated using the transfer function in the frequency domain and the …
- Journal Article:
Vanegas-Cantarero et al.
… strengthening supply chains and supporting legal frameworks. Consequently, the choice of renewable energy technologies should be based on a comprehensive assessment addressing the … that are affected. Clean energy technologies are traditionally evaluated on the basis of their techno-economic performance. Such an approach penalises emerging energy technologies … that are generally more capital-intensive given their innovation requirement and the lack of support mechanisms facilitating their industrial roll-out. In this paper, a multi-criteria …
- Journal Article:
Tay and Venugopal
… This paper investigates the energy extraction of three types of wave energy converters (WEC) arranged in arrays and subjected to multi-directional seas of different wave spreading. The changes in the wave climate observed in the neighborhood of the …
- Conference Paper:
Clark et al.
… loads (DELs) for a PTO given three hull shapes (a cylinder, a sphere, and a barge), two sets of metocean conditions (from the center of the North Sea and off the west coast of Norway), and two float motions (heave and surge). Results indicate that hull geometry has a …
- Journal Article:
Pierart et al.
… In order to design and evaluate the behaviour of a numerically optimised wave energy converter (WEC), a recommended procedure is to initially … up until the full-scale is reached. At any point, an important step is the correct selection of the wave theory to model the dynamical behaviour of the WEC. Most authors recommend the selection of a wave theory based on dimensional …
- Conference Paper:
Hiles et al.
… The influence of the dimensionality of the performance matrix and the duration of the performance data series on the power performance assessments by the IEC/TS-62600-100 and …
- Journal Article:
Anderlini et al.
… A model-free algorithm is developed for the reactive control of a wave energy converter. Artificial neural networks are used to map the significant wave … time horizon spanning multiple wave cycles, with data being collected throughout the lifetime of the device so as to train the networks off-line every 20 time horizons. Initially, random … optimization is employed, which uses the neural networks within the cost function. The aim of the optimization is to maximise energy absorption, whilst limiting the displacement to prevent …
- Journal Article:
Nambiar et al.
… different renewable energy targets set by various governments and world bodies. To make use of this potential, the industry will soon be moving from sea testing of individual wave energy converters (WECs) to the deployment of arrays and farms of WECs. The … to contribute to meeting the 2020 and 2050 targets for offshore renewable energy. … doi.org/10.1016/j.ijome.2014.11.002 …
- Journal Article:
Fàbregas Flavià et al.
… introduced by Kagemoto H. and Yue (1986) enables one to drastically speed up the computation of the added mass, damping and excitation force coefficients of a group (”farm”) of floating bodies when compared to direct calculations with standard widely available boundary …
- Journal Article:
Garcia-Teruel and Clark
… loading (DEL). Optimised hull geometries for two sites are considered (from the centre of the North Sea and off the west coast of Norway), and two directions of motions (heave and surge). Results indicate that site characteristics affect the potential …
- Journal Article:
Stratigaki et al.
… (WECs) extract energy from ocean waves and have the potential to produce a significant amount of electricity from a renewable resource. However, large “WEC farms” or “WEC arrays” (composed of a large number of individual WECs) are expected to exhibit “WEC array effects”. These effects represent the …
- Journal Article:
Stratigaki et al.
… Experiments have been performed in the Shallow Water Wave Basin of DHI (Hørsholm, Denmark), on large arrays of up to 25 heaving point absorber type Wave Energy Converters (WECs), for a range of geometric layout configurations and wave conditions. WEC response and modifications of the …
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