|
|
Publicações
Sinha, A., Karmakar, D. e Guedes Soares, C. (2015), “Hydrodynamic analysis of array of point absorbers combined with a floating platform”, 11th European Wave and Tidal Energy Conference (EWTEC2015), 6-11 Setembro, Nantes, França, pp. 09D1-1-1 - 09D1-1-10
The point absorbers wave energy converter (WEC) systems consists of a buoy with horizontal dimensions that are small compared to the incident wave lengths. The buoy oscillates according to one or more degrees of freedom in order to absorb energy by damping the buoy motion and then the energy is converted into electricity by a generator. The point absorbers can also operate in arrays to produce considerable amounts of power from ocean waves similar to wind energy farms. The array of point absorber devices under development consist of a large structure containing multiple closely spaced oscillating bodies such as Wave Star, Manchester Bobber and FO3.
Several theoretical models were developed by researchers in order to deal with the waves and interacting bodies (Simon (1982), McIver (1984) and Backer (2009)). The studies on the modelling and control of WEC with hydraulic power take-off is performed by Falcão (2008) and Hansen and Kramer (2011). Recently, the studies on the different arrangement of point absorbers and the effect of the change in the floater shape for the hydraulic power take-off point absorber WEC is analyzed by Sinha et al. (2014a, 2014b). Nowadays, the studies are being performed for the combine use of the offshore platform with different technologies within the same infrastructure. The offshore platforms that can combine many functions within the same infrastructure could offer significant benefits in terms of economics, optimizing spatial planning and minimizing the impact on the environment.
In the present study, a linear frequency domain model will be used to simulate the behavior of a heaving point absorber with large floating platform for wave energy extraction. Numerical modeling of the system will be carried out and a linear external damping coefficient will be applied to enable power absorption. In addition, supplementary mass will be introduced to tune the point absorber to the incoming wave conditions. The influence of the relative motion on the power absorption will be examined. The slamming and stroke restrictions will be imposed on the relative floater motion and also on the total control force that can be applied on the floater. The values for the supplementary mass and external damping coefficient will be optimized for each sea state of the wave climate to give the maximum average power absorption keeping in mind all the constraints.
Se nao conseguiu obter uma copia desta publicação: Peça uma cópia desta publicação
Para informação sobre todas as publicações do CENTEC pode descarregar: Lista Completa de Publicações do CENTEC
|