Investigation on piezoelectric energy harvester with different combination actuated by the hyperbaric uniform air load

This paper describes an experimental study of compressed air energy harvesting by a piezoelectric energy harvester. We conducted parametric studies to evaluate the influence of different combinations of piezoelectric patches and the resulting energy output. We have demonstrated the rules for appropriate connection relationships. A peak output power of 0.65 mW occurred at the parallel connection type, and the peak voltage is 32.4 V. The results prove that the parallel connection is better than the series connection. As the number of parallel connections increases, the optimal load resistance decreases gradually. The output power becomes larger when the numbers of piezoelectric patches increase in the same condition.