Abstract
Overtopping breakwater for energy conversion (OBREC) is integration between breakwater and wave energy converter (WEC) that allows incoming waves to be stored in the reservoir. The higher the overtopping amount collected in a reservoir, the greater the energy generated will be. Hence, most of the overtopping concept has attempted to maximize the inclusion of water in the reservoir by optimizing geometrical parameters, particularly the ramp angle. However, the studies corresponding to ramp shapes geometries have not been adequately reviewed. Most studies only focused on the usage of linear overtopping ramp shape. There is still limited knowledge on the influence of different ramp shape parameters towards the overtopping wave. Thus, this paper aimed to push the border of available knowledge by investigating the influence of the ramp shape parameters to the overtopping wave discharge through simulation and experimenting approaches. Seven different ramp shapes have been tested under Malaysia’s wave condition and a new ramp shape parameter allowing for maximized overtopping wave on OBREC is presented.
Highlights
Over the past few years, there has been interest among researchers in converting wave energy into electricity
The result of ramp shape performance will be comprehensively explained by comparing the total amount of water collected in the reservoir
This study investigated the influence of ramp shape by exploring seven ramp shapes based on polynomial equations
Summary
Over the past few years, there has been interest among researchers in converting wave energy into electricity. There are various designs, models, and prototype concepts developed subscribing to this idea starting from the development of coastal based concept such as Tapered Channel (TapCHAN) in 1985 [1], Composite Sea Wall (CSWEC) in 2010 [2], and Sea Slot cone Generator (SSG) in 2012 [3] It was continued with innovation into offshore based structure such as Wave Dragon (WD) in year 2000 [4], Spiral Reef in 2007 [5], Wave Plane (WP) in 2008 [6], and Wave Catamaran (WaveCAT) in 2012 [7] (see Table 1). Some of the OTD devices (such as WD) have achieved full-scale implementation, they were unable to reach the level of commercialization due to low economic contribution, such as the high cost of construction, deploying, and maintaining testable large-scale prototypes [8,9]
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