Abstract
A cascade thermoacoustic engine driving an alternator was numerically designed. It was composed of five regenerators, and one alternator that convert acoustic power to electric power. The acoustic power generated in one regenerator was amplified by four regenerators, and then, it was absorbed by the alternator. When the working fluid is 0.5MPa nitrogen, and the cold and hot temperatures of heat sources are 300K and 450K, respectively, the designed thermoacoustic engine can supply the acoustic power of 53W to the alternator with a thermal efficiency of 0.03, corresponding to 11% of the Carnot efficiency.
