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- Wang, C., Zhang, Y., Deng, Z.
Traditionaloscillating water column(OWC) devices are mostly fixed with almost no components allowed to move. To complement the research of OWC consisting of moving components, the capability in extracting wave energy for a device with a surging front and back lip-wall restricted by differentspring stiffnessvalues is investigated. A theoretical model is developed based onpotential flow…
- Laporte-Weywada, P., Scriven, J., Matysiak, A., Konig, R., May, P., Roeber, V., Kalisch, H.
The MegaRoller project, funded under the European Union’s Horizon 2020 research and innovation programme, aims to develop and demonstrate a novel Power Take-Off (PTO) solution for Wave Energy Converters (WECs). As part of the project, a wave-by-wave prediction software was developed, with a neural network prediction algorithm at its core. In this paper, the impact of the control strategy on…
- Negri, M., Malavasi, S.
The EDS (Energy Double System) is a combined heave-surge oscillating-body WEC (wave energy converter) designed for the nearshore zone, composed by a heaving float and a surging paddle supported by a unique structure. This paper investigates, through laboratory modelling, the behavior of EDS at various water depths along a sloping beach. The float alone, obtained by removing the paddle from the…
- Cheng, Y., Dai, S., Ji, C., Collu, M., Yuan, Z., Incecik, A.
The hybrid concept of multi-type wave energy converters provides viable solutions to improve the wave energy exploitation per-unit area and reduce the Levelised Cost of Electricity. In this paper, a multi-degree-of-freedom hybrid system combining an oscillating wave surge converter and two oscillating buoys, is proposed and integrated into a semi-submersible platform to be suitable for both…
- He, Z., Ning, D., Gou, Y., Zhou, Z.
A parameter optimization method for an oscillating buoy-type wave energy converter (WEC) is presented from the perspective of submerged buoy volume; which affects both the power production and cost investment. The effects of submerged buoy volume on the optimal power capture are studied using the differential evolution algorithm and linear potential flow theory. The cost indictor V/P (V and P…
- Cheng, Y., Du, W., Dai, S., Ji, C., Collu, M., Cocard, M., Cui, L., Yuan, Z., Incecik, A.
Combining multiple-types of Wave Energy Converters (WECs) and integrating them into in-development or pre-existing marine platforms can reduce the total Levelised Cost of Energy (LCoE) by sharing infrastructures and maintenance costs. The current study proposes an innovative multi-purpose solution by deploying an Oscillating Buoy (OB) device inside the chamber of an Oscillating Water Column (…
- Choiniere, M., Davis, J., Nguyen, N., Tom, N., Fowler, M., Thiagarajan, K.
In order to improve their long-term viability, wave energy converters (WECs) need to be able to shed loads when a threshold wave condition is exceeded. As shown by Tom et al. (2016) [1], provision of adjustable flaps within the body of an oscillating surge wave energy converter (OSWEC) allows wave energy to pass through the device. A control system may then be able to open and close the flaps…
- Dias, F., Renzi, E., Gallagher, S., Sarkar, D., Wei, Y., Abadie, T., Cummins, C., Rafiee, A.
The development of new wave energy converters has shed light on a number of unanswered questions in fluid mechanics, but has also identified a number of new issues of importance for their future deployment. The main concerns relevant to the practical use of wave energy converters are sustainability, survivability, and maintainability. Of course, it is also necessary to maximize the capture per…
- Wang, N., Zou, J., Yang, Y., Li, X., Guo, Y., Jiang, C., Jia, X., Cao, X.
Everywhere in nature we can find wonder designs and systems that never cease to inspire us looking for answers to engineering and design. In this paper, bio-inspired triboelectric nanogenerator (BITENG) has been designed to mimic the motion of kelp, which gently sways along with wave and harness the energy in this process. The energy harvesting has been proven as stable and efficient, which…
- Drew, B., Plummer, A., Sahinkaya, M.
Ocean waves are a huge, largely untapped energy resource, and the potential for extracting energy from waves is considerable. Research in this area is driven by the need to meet renewable energy targets, but is relatively immature compared to other renewable energy technologies. This review introduces the general status of wave energy and evaluates the device types that represent current wave…
- Liu, C., Hu, M., Zhao, Z., Zheng, Y., Gao, W., Chen, J., Yan, H., Zhang, J., Yang, Q., Bao, G., Chen, S., Wei, D., Min, S.
The raft-type waveenergy converter(WEC), consisting of several hinged rafts and hydraulic power take-off (PTO) systems, captureswave power ina line absorber manner, whose scattered and radiated wave pattern is different from that of a point absorber. This paper focuses on the latching control of a raft-type WEC consisting of two rafts and a hydraulic PTO system. To reduce the complexity of…
- Amini, E., Asadi, R., Golbaz, D., Nasiri, M., Naeeni, S., Nezhad, M., Piras, G., Neshat, M.
The search for renewable energy supplies for today’s global energy demand, particularly ocean wave energy for coastal areas, has become undeniably widespread in the last two decades. The Caspian Sea represents an immense opportunity for using ocean renewable energy, especially considering its long shoreline. In this study, the locations with maximum potential wave energy were chosen in the…
- Scriven, J., Cruz, J., Cruz Atcheson Consulting Engineers, Lda.
A Power Take-Off (PTO) is a core sub-system of a Wave Energy Converter (WEC) related to the conversion of wave to electrical power. The PTO is exposed to challenging environmental loading conditions that characterise wave energy. This paper investigates how the PTO developed by the UMBRAGROUP in the H2020 IMAGINE project could be considered for multiple WEC configurations. In particular, the…
- Wang, Y.
This paper concerns the prediction of the power output performances of an oscillating surge wave energy converter inirregular waves. The generated power has been calculated using a new methodology by incorporating a stochasticLagrangewave model into anon-linear filterwhich takes alsohydrodynamic forcesinto account. It is shown that the stochastic Lagrange wave model in this paper can be…
- Holland, J., Cyr, J., Vo, D.
As climate change becomes a topic of increasing importance, and the demand for energy continues to grow, it is imperative that the world shifts its focus toward alternative, clean sources of energy. Ocean waves are a largely untapped resource that are just now beginning to emerge as a viable option. The UMaine Wave Energy Task Force is working to analyze the energy potential of ocean waves,…
- Choiniere, M., Thiagarajan, K., Tom, N.
This study investigates the performance of an oscillating surge wave energy converter (OSWEC) that utilizes adjustable geometry as a means of controlling the hydrodynamic coefficients, a concept originally proposed by [1]. The body of the device consists of a bottom-hinged solid rectangular frame with five horizontal flaps spanning the interior of the frame. The flaps can rotate independently…
- Xiao, L., You, Y., Wang, Z., Huang, S., Wang, W.
This paper presents an oscillating slider wave energy device which is based on a seabed anchoring and uses eagle beak as the absorber. The self-compiled program uses the boundary element theory based on the simple Green’s function to solve the wave forces and hydrodynamic parameters. And the equation of motion, the oscillation of the float and the capture width ratio are obtained by the modal…
- Suchithra, R., Das, T., Rajagopalan, K., Chaudhuri, A., Ulm, N., Prabu, M., Samad, A., Cross, P.
The present work describes the design and analysis of a compact and modular wave-powered desalination (WPD) system. The design of the unit is influenced by the United States Department of Energy (DOE) Waves to Water competition rules. The system consists of a flap-type wave surge converter that converts wave energy into hydraulic piston force through a double-acting cylinder working as a power…
- Rajagopalan, K., Cross, P., Ulm, N., Ravikumar, S., Das, T., Prabhu, S., Chaudhuri, A., Samad, A.
The paper highlights the collaborative research between University of Hawaii and the Indian Institute of Technology, Madras, to move forward the design of a compact wave powered desalination unit. Detailed hydrodynamic optimization is undertaken to optimize the weight, volume and overall performance of the unit. A fully coupled hydrodynamics/filtration model, developed with WEC-Sim software…
- Michailides, C., Gao, Z., Moan, T.
This paper presents a study of the wave- and wind-induced responses of the combined energy concept Semisubmersible wind energy and Flap-type wave energy Converter (SFC) under operational and survival conditions based on experimental data. The measured responses that are studied include the motions of the semisubmersible, the rotation of the flap-type Wave Energy Converters (WECs), the tension…
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