| Summary: | 碩士 === 逢甲大學 === 機械與電腦輔助工程學系 === 107 === The flywheel is a commonly used energy storage setting. The principle is to store energy in the form of kinetic energy under high speed rotation. When the energy is to be released, the rotational kinetic energy is then converted into electrical energy.
Flywheel performance can be attributed to three factors, namely material strength, geometry (cross-section) and rotational speed, and the shape optimization of the geometric cross-section can increase the kinetic energy storage capacity per unit mass. In this study, ANSYS/APDL was used to investigate the effect of flywheel shape optimization on its energy storage density. The computed results were verified by analytical solution in good agreement. When the outer diameter and the rotational speed of the flywheel are fixed, the energy storage density can be improved by shape optimization, and the improvement efficiency is 6.66% when the inner diameter is 0.02 m; when the inner diameter and the outer diameter are fixed, the energy storage density is significantly improved by shape optimization, and the improvement efficiency is up to 24.6% when the rotational speed is between 9000 and 11000 rpm.
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