M.Sc Thesis

M.Sc StudentDan Magazinnik
SubjectA Study on the Dynamics of a Water-Waves Driven Energy
Harvesting System
DepartmentDepartment of Mechanical Engineering
Supervisor Full Professors Bucher Izhak
Full Thesis textFull thesis text - English Version


The present thesis studies the dynamics of an energy harvesting (EH) prototype driven by water-waves. By exploiting the dynamics of a double well, electromagnetic potential-barrier EH system, an efficient electromechanical conversion mechanism is produced. The device converts the slow motion of open-sea-like water-waves, produced by a laboratory simulator, into fast vibrations, thus creating high voltage levels through a multi-turn coil that moves relative to a magnetic field. Water-waves produce a quasi-periodic type of excitation to a floating device whose motion drives the conversion system through an oscillating mechanical link. The proposed prototype increases the efficiency of energy conversion by performing frequency up-conversion leading to increased levels of induced voltage. It is shown that the conversion device can be tuned to produce higher energy levels by introducing a relatively small change in the mechanical setup of the magnetic potential barrier. The research relies on a simplified analytical model, which is validated by laboratory experiments aimed at studying the effect of potential barrier level and wave magnitude on the harvested power.