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本文阐述了为太阳能发电系统设计的400W行波热声发电系统(TWTAEG)的实验研究过程。实验系统由行波热声发动机和直线发电机组成,系统采用平均压力为3.5MPa的氦-氩混合气体为工质,其中氩气分压比为1.4%,系统运行频率为74Hz。实验中最大输出电功为446W,此时的热电效率为13%;在输出电功为416W时热电效率最大,达到14.3%;发动机的最大输出声功为835W,发动机的热声转换效率最大值为22.2%;电机的最大声电转换效率为65%。
This paper describes the experimental study of a 400W traveling wave thermoacoustic power generation system (TWTAEG) for a solar power generation system. The experimental system consists of a traveling-wave thermoacoustic engine and a linear generator. The system uses helium-argon mixed gas with an average pressure of 3.5 MPa as the working fluid, wherein the argon partial pressure ratio is 1.4% and the system operating frequency is 74 Hz. In the experiment, the maximum output electric power is 446W, the thermoelectric efficiency is 13% at this time; the maximum thermoelectric efficiency is 14.3% when the output electric power is 416W; the maximum output sound power of the engine is 835W; the maximum thermoacoustic conversion efficiency of the engine Is 22.2%; the maximum electro-acoustic conversion efficiency of the motor is 65%.