Uma análise da transferência de calor em para-raios de ZnO.

Abstract

This paper shows the study of the zinc oxide surge arrester’s thermal behavior, with computational simulations allied to thermography, and to do so, it was built a computational model, based on real surge arresters data. Along the study, the differences between the ceramic housing and polymeric housing surge arresters are studied, both of the constructive and thermal behavior aspects. The impact of using different heat transfer mechanisms in the simulations of the ceramic housing surge arrester is also studied. Besides, there is a comparison in the computational effort needed to process the simulation of the ceramic housing surge arrester in two models: one using electrical input (voltage and current) and another using thermal input directly, knowing the dissipated power, previously. It was simulated a situation of impulsive behavior energy as input, with the objective of study the thermal behavior of the surge arrester due to atmospheric discharge. Finally, to evaluate the model constructed in this study, a comparison is made between the results of the simulations and the data from the experiment done in the high voltage laboratory of the Federal University of Campina Grande.