Research On Wave Energy Harvesting System Based On Annular Multi Electrode Triboelectric Nanogenerator

Building a maritime power is a major strategic task for the great rejuvenation of the Chinese nation.In the field of marine monitoring,a large number of sensors are indispensable as monitoring means.Marine sensors are not only used for marine scientific research,but also provide important data for the development of marine resources.The emergence of Triboelectric Nanogenerators(TENG)provides a new way to obtain low-frequency wave energy from the ocean and convert it into electrical energy to supply power for ocean sensors.In order to effectively collect wave energy and improve the electrical output performance of the triboelectric nanogenerator,this paper proposes a new structure,the annular multielectrode triboelectric nanogenerator(AM-TENG),which is composed of an annular shell and an inner ball,to efficiently collect wave energy.The main research contents and conclusions are as follows:Firstly,through theoretical and simulation analysis,the generation mechanism and potential distribution of the annular multi electrode triboelectric nanogenerator are studied.Secondly,the COMSOL software is used for simulation analysis.The open circuit voltage between two adjacent electrodes of AM-TENG under different structural parameters is studied through the electrostatic field module.The structural parameters include the diameter and number of inner spheres,electrode spacing and number.The results show that the open circuit voltage between electrodes can be increased by increasing the diameter and number of inner spheres;The multi electrode structure can improve the electron transfer rate and efficiently collect wave energy in all directions.The motion displacement and swing angle of AM-TENG under different wave parameters and ring structure dimensions are studied through fluid structure coupling module simulation,and then the influence on the electrical output performance of AMTENG is analyzed.It is concluded that in the fixed sea state range,there is an optimal ring structure size to increase the electrical output performance of AM-TENG.Improve the electrical output performance of AM-TENG from the aspect of structural optimization design.Finally,the AM-TENG device is made and the wave simulation platform is built.Using the control variables,the influence of wave parameters on the electrical output performance of AM-TENG under three degrees of freedom of heave,roll and pitch is studied.The wave parameters include frequency and amplitude.The experimental results show that the open circuit voltage of AM-TENG increases with the increase of wave frequency and amplitude under the three degrees of freedom of heave,roll and pitch.The charging characteristics are also studied.When the annular multi electrode triboelectric nanogenerator is connected to the energy storage circuit,4.7 μF The capacitance of F is charged to 12 V,and the output voltage is basically stable.The experiment verifies that AM-TENG has good power generation performance in wave energy collection,and shows a huge development prospect in power supply for ocean sensors.It can continuously,stably and continuously convert wave energy into electric energy to power supply for ocean sensors.