A Basic Theory of Induction Heating for a Wind-Powered Thermal Energy System

A wind-powered thermal energy system (WTES) can convert wind power efficiently into thermal energy to be stored for stable and low-cost electric power generation. This paper derives a basic formula of induction heating for heat generation in the WTES. The dependence of heat generation on the number of magnetic poles and material parameters of the conductor is analytically derived. The maximal heat generation is given by a simple function of the conductor radius, rotational speed, and applied magnetic flux density. Finite-element eddy-current analysis shows that the derived analytical solution gives a reasonable estimation of heat generation.