A parameter study and optimization of two body wave energy converters

A Shape Optimization Method of a Specified Point Absorber Wave Energy Converter for the South China Sea

“…As for spectral parameters, the maximum absorbed power increases with the increase of PTO damping. The resonance frequency decreases as the PTO damping increases, which is inconsistent with the PTO-independent resonance frequency obtained by Equation (17). This inconsistency may be caused by an inconsistent solving method.…”

“…Usually, PAs can be divided into four stages [9]: the absorption stage, the transmission stage, the generation stage and the conditioning stage. At the energy absorption stage, geometric optimization is usually used to improve the wave energy capture efficiency [10][11][12][13][14][15][16][17][18]. At the transmission stage, many studies focus on optimizing the PTO system configuration [19][20][21] and proposing new PTO types for different transmission systems, such as nonlinear power capture mechanism [22,23], fluidic flexible matrix composite PTO pump [24] and gyroscopic PTO [25].…”

“…The optimal geometrical configuration was established by defining the significant velocity as the objective function which needed to be maximized. Shami [17] and Shadman [18] used the Design of Experiment (DOE) method to optimize the radius and draft of a heave cylindrical buoy. The objective functions used are the maximum absorbed power, resonance frequency and absorption bandwidth of the buoy's absorption power spectrum.…”

Point Absorber Wave Energy Harvesters: A Review of Recent Developments

“…Also, Piscopo, Benassai, Cozzolino, Della Morte and Scamardella [17] suggested a new optimization method for two-body WECs; the design parameters such as the PTO damping, submerged body added mass, buoy diameter and draft were iterated in an attempt to derive the optimal design with regards to the varying yearly operating variables. Recently, Al Shami, et al [94] conducted a parametric study by utilizing the Taguchi method and based on the results, two body WECs were optimized so that the power capture and bandwidth increase, while the resonance frequency decrease. It was deduced that the shape of the submerged body has a big impact on both the harvested power and the natural resonant frequency.…”

“…Our team has been working on point absorbers since mid-2017. We are a multidisciplinary team working on wave energy harvesting for Australia; focusing on three main aspects: Hydrodynamics and design of point absorbers WECs; where hydrodynamic and design optimizations of two-body WECs ensure that they are able to capture the most power for places with low frequency and high energy density like Australia [94]. Development of novel PTO concepts for point absorbers; where novel vibration energy harvesting systems are numerically and experimentally developed for point absorbers to operate at low frequency and be cost effective [34,115].…”