| Ocean wave energy has received a lot of attention from scholars due to its wide distribution and huge storage capacity.This paper investigates the achievability and performance of the Triboelectric nanogenerators technology for harvesting ocean wave energy,which has great potential for application in the field of ocean wave energy harvesting.In this paper,a wave-following eccentric-start Triboelectric nanogenerators is proposed and designed to harvest ocean wave energy based on the characteristics of actual offshore sea conditions.The Triboelectric nanogenerators is divided into a main part and a tail fin part.The main part is an eccentric rack and pinion with a suitable frictional dielectric layer and electrode material for low-frequency,small-wave and high-wave start-up power generation.The tail fin section enables the Triboelectric nanogenerators to follow the waves and achieve better power generation.The floating motion characteristics of the Triboelectric nano generators are closely related to its power generation performance.By analysing the actual wave conditions in the offshore ocean,the floating motion characteristics of the Triboelectric nanogenerators are solved and analysed with the aid of computational fluid dynamics software based on linear wave theory.The relationship between the longitudinal rocking angle and the wave height of the generator under the action of linear waves is analysed,and the relationship between the wave height and the maximum longitudinal rocking angle is derived,and the variation of the longitudinal rocking angle in the fitted time domain is determined to be in sinusoidal form.The internal dynamics of the Triboelectric nanogenerators itself also has a significant effect on the power generation performance.The dynamics of the internal power generation module of the Triboelectric nanogenerators is modelled by combining numerical calculations and simulations with the variation in the fitted time domain.Firstly,the starting performance of the eccentric rack and pinion structure is verified for small wave heights,i.e.small angular conditions.Secondly,the effect of the period and rotation angle on the relative displacement and velocity of the friction between the dielectric layer and the electrode is investigated by means of a combination of kinetic modelling and simulation in the fitted time domain under the longitudinal rocking angle,and its power generation performance is predicted using the friction generation principle.The experiments were completed separately for single land and whole pool experiments to verify the power generation performance and application effects.The single-unit terrestrial experiment was conducted to test the effect of different rotation angles and periods on the power generation performance of the Triboelectric nanogenerators,and concluded that the power generation performance decreases as the period increases or the rotation decreases.The effect of rotation angle and period on the power generation performance is illustrated by comparing the open circuit voltage,short circuit current,transferred charge and power,and comparing the results of kinetic studies and predictions,the experimental results are in general agreement with the predicted results.The experiments were carried out using a home-made pool to test the application effect of the experimental prototype,and finally the LEDs arranged as"HEU" were successfully lit,proving that it can be used for practical power generation applications. |
