Wave power

About: Wave power is a research topic. Over the lifetime, 2671 publications have been published within this topic receiving 41439 citations. The topic is also known as: wind wave energy & sea wave energy.

North Sea Wave Database (NSWD) and the Need for Reliable Resource Data: A 38 Year Database for Metocean and Wave Energy Assessments

Abstract: The study presents a newly generated hindcast database of metocean conditions for the region of the North Sea by parametrising the newly introduced ST6 physics in a nearshore wave model. Exploring and assessing the intricacies in wave generation are vital to produce a reliable hindcast. The new parametrisations perform better, though they have a higher number of tuneable options. Parametrisation of the white capping coefficient within the ST6 package improved performance with significant differences 20–30 cm. The configuration which was selected to build the database shows a good correlation 95% for Hm0, has an overall minimal bias with the majority of locations being slightly over-estimated 0.5–1 cm. The calibrated model was subsequently used to produce a database for 38 years, analysing and discussing the metocean condition. In terms of wave energy resource, the North Sea has not received attention due to its perceived ``lower'' resource. However, from analysing the long-term climatic data, it is evident that the level of metocean conditions, and subsequently wave power, can prove beneficial for development. The 95th percentile indicates that the majority of the time Hm0 should be expected at 3.4–5 m, and the wave energy period Te at 5–7 s. Wave power resource exceeds 15 kW/m at locations very close to the coast, and it is uniformly reduced as we move to the Southern parts, near the English Channel, with values there being 5 kW/m, with most energetic seas originating from the North East. Results by the analysis show that in the North Sea, conditions are moderate to high, and the wave energy resource, which has been previously overlooked, is high and easily accessible due to the low distance from coasts. The study developed a regional high-fidelity model, analysed metocean parameters and properly assessed the energy content. Although, the database and its results can have multiple usages and benefit other sectors that want to operate in the harsh waters of the North Sea.

Preliminary Assessment of Wave Energy Potential around Indonesia Sea

Abstract: A preliminary assessment of the available wave energy around Indonesia is presented. The computations have been conducted by using the wave data collected during 35 years period from 1980 to 2014 from European Centre for Medium-Range Weather Forecasts (ECMWF). Location situated in the south of Java Sea has the most promising location for wave power potential, with the highest energy resource available in the month of January to December. The yearly mean wave power is maximum at the Java sea can reach 22 kW/m.

Natural vibration adjustment mechanism of wave power generator

Abstract: Provided is a wave-power generator capable of adjusting a natural period (natural frequency) in response to a changing wave period. The wave-power generator (1) includes a weight (3) that is installed in a floating body (2) via a spring (4) and that linearly reciprocates in response to a fluctuation of a water surface (7) and a generator (8) that generates power by being driven based on the linear reciprocating motion of the weight (3). An additional-mass body (6) for adding a mass to the mass of the weight (3) is further included.

Wave power plant for electricity generation has float movable up and down to create torque in rotating rod

Abstract: The wave power plant is arranged on the sea surface. It has a frame with a central horizontal rotating rod (4) and floats (10) on either side of it. Rotating arms (5, 6, 7, 8, 9) connect the floats to the rotating rod. When the wave causes the float to move up, it creates torque in the rotating rod in the direction of the rod's rotation. When the float is moved down, the same occurs.