The impact of Marine and Offshore Renewable Energy on the European Energy System Evolution

The European energy transition policies aim to mitigate the effects of climate change by moving away from fossils and promoting both onshore and offshore renewable energy technologies. Although onshore renewables are driving the transition so far, policymakers believe that in order to achieve the targets, the power grid must have access to the...

Wave Energy Array Optimization in Irregular Waves

Ocean waves being considered to have huge potential on providing renewable energy resources. While significant research and application of wave energy converters have been conducted in many seas, exploration on low-energy seas is still an ongoing endeavour. In this study, a point absorber array is being studied in the scenario of implementing at...

Two raft wave energy converters: A combined optimisation of annual energy conversion and stability

Global warming has caused an increasing demand for renewable energy. Currently, 50% of the renewable energy is provided by wind and solar combined. However, these renewable energy sources are highly volatile. Wave energy converters can provide a stable renewable energy source. Previous research has contributed to understanding various combined...

Time Domain Modeling of a Point Absorber

The demand for renewable energies is rising due to climate goals and high oil prices. Not only the established renewable sources like wind and solar are interesting to exploit. There is a vast amount of energy stored in the world’s oceans. To harvest this energy, one needs a Wave Energy Converter (WEC). There<br/>are already some prototype WECs...

Maximizing the Energy Conversion of a U-Oscillating Water Column in the Low Wave Energy Climate of Gwadar, Pakistan

The purpose of this report is to design a wave energy converter, in particular a U-oscillating water column (U-OWC), to maximize energy conversion in the low wave energy environment of Gwadar, Pakistan. At present Pakistan’s 1000km coastline is largely undeveloped and the county is devoid of any wave energy harnessing devices or studies. However...

A frequency dependent drag coefficient on the motion response of a hybrid STC wind-wave energy converter

The vertical viscous drag force acting on a heaving cylinder with flat and hemispheric bases is investigated by means of an experiment, a linear and a nonlinear analytic model. Viscous effects create a significant uncertainty in estimating the motion response of oscillating cylinders in waves of different frequencies. Forced oscillation tests...

A two-dimensional boundary element method for floating cylinders of arbitrary shape in frequency domain with power take off and second order predictions

A two-dimensional (2D) panel method is developed to find the first and second order wave forces acting on a semi-submerged cylinder in regular waves. The panel method is based on potential flow and the waves are modeled for both finite and infinite water depth. The motion is limited to heave, but allows for extensions to other modes as well. It...

System design and control of a novel ocean wave energy converter array

There is a great amount of wave power in earth's oceans. The amount of power harvested for electricity is however very small in comparison to solar and wind. One of the reasons for this is the lack of consensus on the best design of wave energy converters. This thesis develops a novel system design for a wave energy converter array that has...

Experimental setup of the dry test for Gyroscopic-pendulum wave energy converter

Oceans account for 71 percent of the earth’s surface, marine resources and energy are abundant. Therefore, making full use of marine energy is a good choice for humans to solve the energy crisis. One way to capture ocean energy is converting wave energy to electrical energy, by means of devices called wave energy converters (WECs). This project...

Power Efficiency of the Gyroscopic-Pendulum Wave Energy Converter

The oceans, which cover nearly 70% of the earth’s surface, can be considered as an inexhaustible energy source for renewable electricity due to its size and predictability. One way to capture ocean energy is by harnessing the energy produced by waves at sea, by means of devices called wave energy converters (WECs).<br/><br/>Delft University of...

Modelling of submerged oscillating water columns with mass transfer for wave energy extraction

In the past decades, the global demand for energy has increased. The aim to reduces has let to an increase in the production of renewable energy sources, such as wind and solar energy. However, there are more major energy resources available in the oceans, such as wave and tidal power. The estimated potential global energy resource in waves is...

Performance assessment of the Ocean Falls Wave Energy Converter: A solution for electrical power production in the future

There is a growing demand for renewable sources of energy of which wave energy conversion is one. The Ocean Falls is an oscillating water column (OWC) system invented by BAM Infraconsult b.v. This system differs from conventional OWC systems since it includes a connection tube and an adjustable back wall. The OWC system is a resonance system for...

Investigation of the robustness of an Oscillating Water Column breakwater under extreme wave conditions

The work presented will investigate the usage of Oscillating Water Columns (OWC) in Coastal Structures to understand the functionality requirements and the viability of installing these devices in caisson breakwaters. The main focus is put on the efficiency of the design, to achieve optimum results and to avoid possible failure of the structure....

Feasibility of using wave enhancement methods to optimise wave conditions in wave energy converter arrays

Wave energy is a promising renewable resource for the extraction of energy. To increase the efficiency of this technology a parabolic reflection wall is located behind a wave farm of heaving point absorber wave energy converters (WECs) to increase the power output of the WEC array by altering the wave field. The WECs are modelled with patches of...