Abstract

We designed and built a multistage thermoacoustic Stirling engine electric generator prototype, where three regenerators aligned in series, not in parallel, enables the power gain of 5.1 with the temperature ratio of 1.95. In this study, we increased the acoustic power level to 17 W from 20 mW in the previous experiment. Additionally, we studied the thermal efficiency of thermoacoustic energy conversion by controlling specific acoustic impedance, in order to verify the multistage thermoacoustic Stirlung engine as a useful energy conversion device.

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