Renzi E.,University College Dublin |
Doherty K.,Aquamarine Power Ltd. |
Henry A.,Aquamarine Power Ltd. |
Dias F.,University College Dublin |
Dias F.,Ecole Normale Superieure de Cachan
European Journal of Mechanics, B/Fluids | Year: 2014
Oyster® is a surface-piercing flap-type device designed to harvest wave energy in the nearshore environment. Established mathematical theories of wave energy conversion, such as 3D point-absorber and 2D terminator theory, are inadequate to accurately describe the behaviour of Oyster, historically resulting in distorted conclusions regarding the potential of such a concept to harness the power of ocean waves. Accurately reproducing the dynamics of Oyster requires the introduction of a new reference mathematical model, the "flap-type absorber". A flap-type absorber is a large thin device which extracts energy by pitching about a horizontal axis parallel to the ocean bottom. This paper unravels the mathematics of Oyster as a flap-type absorber. The main goals of this work are to provide a simple-yet accurate-physical interpretation of the laws governing the mechanism of wave power absorption by Oyster and to emphasise why some other, more established, mathematical theories cannot be expected to accurately describe its behaviour. © 2014 Elsevier Masson SAS. All rights reserved.
Agency: European Commission | Branch: H2020 | Program: MSCA-ITN-EID | Phase: MSCA-ITN-2015-EID | Award Amount: 804.64K | Year: 2016
This initiative proposes an innovative training environment for 3 ESRs in a supportive environment provided by an award-winning progressive wave energy company (Aquamarine Power Ltd) and a research centre at the forefront of innovation in wave energy device optimisation and control (the Centre for Ocean Energy Research at NUIM). The ESRs will be recruited by COER and will be seconded for 50% of their time to APL. There is a clear need for a training programme that integrates academic and industrial contributions. The proposed programme integrates formal and informal training activities with a rich set of industry-academic research projects, supported by significant secondment to the industrial partner and experience with real-world tank and ocean testing, wave-energy device deployment and implementation of new research results in state-of-the-art wave energy technology. The ESRs will be enrolled in a Structured PhD programme at NUIM, and will benefit from a series of structured training models. The training programme is complemented by a set of network-wide training activities. The research programme is composed of 3 closely-knit projects in the research area of wave energy and ocean energy, which allow the ESRs to have significant interaction, yet providing each ESR with an independent set of objectives and the opportunity to play a significant role in the rapidly developing area of wave energy conversion. With a clear global requirement to provide new energy sources, this programme aims to contribute to both the rapid commercialisation of a viable and economic wave energy technology, while also providing a pipeline of well-trained engineers with research, technical and commercial skills which are badly needed by this rapidly-expanding industrial sector.
Smith K.,Aquamarine Power Ltd.
Underwater Technology | Year: 2011
The following paper presents the differences in the development of the Danish and UK wind industry in order to highlight key issues that led to their respective success and failure. By comparing the political, economic, social and technological policies that have defined the growth of the two industries, the paper contends that the lack of a clear and consistent market price support mechanism together with a slow planning process and delayed grid access were significant weaknesses in the UK. It also suggests that these factors must be addressed to ensure the same barriers do not stunt the growth of the UK marine renewable industry. To maintain the lead in an emerging marine energy industry, the UK government must facilitate strong public support for wave and tidal energy in parallel with assisting with R&D and project capital grants. Clear and consistent policy with regard to price support mechanisms and priority access to the grid are necessary to ensure a stable and reliable market. Lessons learned from the success of the Danish wind industry must be applied if the UK wishes to secure a stronghold in this market.
Aquamarine Power Ltd. | Date: 2010-05-17
A desalination system comprises a reverse osmosis device, a pump for pressurizing fluid to be desalinated, a supply conduit for supplying the pressurized fluid to the reverse osmosis device, and a wave power system for driving operation of the pump, wherein the wave power system comprises a turbine connectable to a transmission for driving operation of the pump and arranged such that in operation rotation of the turbine provides mechanical energy to the transmission to drive operation of the pump; and a wave energy conversion device connectable to a turbine fluid supply conduit for supplying fluid to the turbine, wherein the wave energy conversion device is arranged to operate in response to wave motion to transfer fluid through the turbine fluid supply conduit to drive rotation of the turbine.
Aquamarine Power Ltd. | Date: 2011-03-09
The present invention relates to a wave energy conversion device (1), for use in relatively shallow water, which has a base portion (2) for anchoring to the bed of a body of water (6) and an upstanding flap portion (8) pivotally connected (12) to the base portion. The flap portion is biased to the vertical and oscillates, backwards and forwards about the vertical in response to wave motion acting on its faces. Power extraction means extracts energy from the movement of the flap portion. When the base portion (2) is anchored to the bed of a body of water (6) with the flap portion (8) facing the wave motion, the base portion (2) and the flap portion (8) extend vertically through at least the entire depth of the water, to present a substantially continuous surface to the wave motion throughout the full depth of water from the wave crest to the sea bed. A method for extracting energy from waves using the device (1) and an energy generating system using interconnected devices (1) are also described.
Aquamarine Power Ltd. | Date: 2010-10-06
The present invention relates to a wave energy conversion device (1), for use in relatively shallow water, which has a base portion (2) for anchoring to the bed of a body of water (6) and an upstanding flap portion (8) pivotally connected (12) to the base portion. The flap portion is biased to the vertical and oscillates, backwards and forwards about the vertical in response to wave motion acting on its faces. Power extraction means extract energy from the movement of the flap portion. When the base portion (2) is anchored to the bed of a body of water (6) with the flap portion (8) facing the wave motion, the base portion (2) and the flap portion (8) extend vertically through at least the entire depth of the water, to present a substantially continuous surface to the wave motion throughout the full depth of water from the wave crest to the sea bed. A plurality of devices can be interconnected to form one system. The distance between the plurality of flaps is dependent on the wavelength.
Aquamarine Power Ltd. | Date: 2011-06-28
Aquamarine Power Ltd. | Date: 2010-07-22
A wave energy conversion apparatus comprises:-a mechanical element arranged in operation to move repeatedly in a cycle in response to wave motion, wherein the speed of the mechanical element varies between a maximum and a minimum during each cycle; power extraction means arranged to extract energy from the movement of the mechanical element; and movement assistance means arranged to assist the movement, in response to the wave motion, of the mechanical element, during at least one part of the cycle during which the speed of movement of the mechanical element is substantially equal to the minimum for that cycle, wherein the power extraction means comprises a fluid pressurisation system that is arranged so that in operation fluid in the fluid pressurisation system is pressurised in response to movement of the mechanical element, the fluid pressurisation system comprises a one-way valve for transferring pressurised fluid from the fluid pressurisation system and the movement assistance means is located upstream of the one-way valve.
Aquamarine Power Ltd. | Date: 2013-06-20
A mounting system comprises a base and a mounting structure for mounting to the base, wherein one of the base and the mounting structure comprises a bearing comprising a resiliently deformable member and having a bearing surface, the other of the base and the mounting structure comprises a further bearing surface for engagement with the bearing surface of the bearing, and the bearing is configured so that shear stress of the deformable member when the mounting structure is mounted to the base biases the bearing surface towards the further bearing surface.