Optimized design based on maximum output power from wave energy

Abstract

A wave energy output device is a renewable energy technology that harnesses the vertical and horizontal motion of ocean waves to convert marine kinetic energy into mechanical or electrical power , offering significant development potential. This paper models the vertical and longitudinal motion of a wave energy device’s float and oscillator using Newton’s second law and solves the derived differential equations with an improved Lungkuta algorithm, obtaining displacement and velocity data over 40 cycles . Based on the motion model, it derives the damper’s output power per cycle and builds a single-objective optimization model to maximize average output power. Using a small curved-edge trapezoidal approximation and a variable-step search, the optimal damping coefficient is found. With constant damping, the maximum average output power is 229.6819 W at a damping coefficient of 37,639; when the damping varies with velocity, the maximum average output power reaches 230.0163 W with an optimal coefficient of 81,478 and a power coefficient of 0.3377.