Impedance matching of traveling-wave thermoacoustic electric generating system

被引：0
|
作者：
Zhang J. [1 ]
Sun D.-M. [1 ]
Wang K. [1 ]
Luo K. [1 ]
Zhang N. [1 ]
Zou J. [1 ]
机构：
[1] Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou
来源：
Sun, Da-Ming (sundaming@zju.edu.cn) | 1600年 / Zhejiang University卷 / 51期
关键词：
Electric generating system; Impedancematching; Linear alternator; Thermoacoustic; Traveling-wave;
D O I：
10.3785/j.issn.1008-973X.2017.03.009
中图分类号：
学科分类号：
摘要：
The output characteristics of a thermoacoustic engine and the input characteristics of linear alternators were calculated based on the decoupling method and theoretical analysis. Moreover, the performance of the traveling-wave thermoacoustic electric generator was studied theoretically and experimentally. Simulation results show that the engine output power and thermal-to-acoustic efficiency are high when the real part of output impedance is in the range of 1.0×107 to 2.0×107 Pa·s/m3, and the imaginary part is under magnitude order of 106 Pa·s/m3; the high-efficiency operating frequency is 65.5 Hz. The performance of the linear alternator is remarkably influenced by working frequency, load resistance, etc. The best working frequency for the alternator is 72 Hz and the optimal range of load resistance is 80 to 200 Ω. The electric generating system can attain 520 W in power and 24.4% in thermal-to-electric efficiency theoretically when the mean pressure is 3.16 MPa and the heating temperature is 550℃ in simulation. The experiment gives a maximum power of 481 W and a highest thermal-to-electric efficiency of 15.1%. The theoretical and experimental results are in coincidence basically, which proves the correctness of the physical model and the good impedance matching of the thermoacoustic electric generating system. © 2017, Zhejiang University Press. All right reserved.
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页码：494 / 499
页数：5
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