This work proposes a methodology that combines distributed and lumped models to simulate the current distribution within an indirect heat resistance furnace and, in particular, to calculate the current to be supplied for achieving a desired power output. The distributed model is a time-harmonic eddy current problem, which is solved numerically using the finite element method. The lumped model relies on calculating a reduced impedance associated with an equivalent circuit model. Numerical simulations and plant measurements demonstrate the effectiveness of this approach. The good correlation between the results indicates that this approximation is well-suited to support the design and improve the efficiency of the furnace in a short time.

这项工作提出了一种结合分布式模型和集总模型的方法来模拟间接热电阻炉内的电流分布，特别是计算为实现所需功率输出而提供的电流。分布式模型是时谐涡流问题，采用有限元方法进行数值求解。集总模型依赖于计算与等效电路模型相关的降低的阻抗。数值模拟和工厂测量证明了这种方法的有效性。结果之间良好的相关性表明，这种近似非常适合支持设计并在短时间内提高熔炉的效率。