Numerical and experimental research on a high-power 4-stage looped travelling-wave thermoacoustic electric generator

被引：21

作者：

Bi, Tianjiao ^{[1
,2
]}

Wu, Zhanghua ^{[2
]}

Chen, Wei ^{[1
]}

Zhang, Limin ^{[2
]}

Luo, Ercang ^{[2
]}

Zhang, Bin ^{[1
]}

机构：

[1] Qingdao Univ Sci & Technol, Coll Electromech Engn, Qingdao 266061, Peoples R China

[2] Chinese Acad Sci, Tech Inst Phys & Chem, CAS Key Lab Cryogen, Beijing 100190, Peoples R China

来源：

ENERGY | 2022年 / 239卷

关键词：

Looped travelling-wave thermoacoustic electric generator; Dual-opposed linear alternator; Network model; ENGINE; PERFORMANCE;

D O I：

10.1016/j.energy.2021.122131

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Looped travelling-wave thermoacoustic electric generator (LTTAEG) can transform thermal energy to electric power using thermoacoustic effect. Based on our previous effort on multi-stage LTTAEG with side-branched and dual-opposed linear alternators (LAs) as acoustic-to-electric transducers, for a higher output electric power and thermal-to-electric efficiency, a 4-stage LTTAEG is studied numerically and experimentally in this paper. In the simulation, the performance of 4-stage looped thermoacoustic heat engine is investigated based on linear thermoacoustic theory while the performance of dual-opposed LA is studied based on a novel network model. A new coupling algorithm between the 4-stage looped TAHE and dual-opposed LA is also proposed. In experiment, with 6 MPa pressurized helium as working gas, 650 degrees C and 25 degrees C heating and cooling temperatures. A highest electric power of 6.1 kW with thermal-to-electric efficiency of 15.86% and a highest thermal-to-electric efficiency of 19.64% with electric power of 4.37 kW is obtained when the electric capacitance connected to the LA is 17 mu F and the electric resistance is 40 Omega and 75 Omega, respectively. Due to the high oscillating pressure in the system, some nonlinear phenomena have caused the simulation results deviated from the experimental results, especially in acoustic power and electric power, which should be investigated and considered in the future study. (C) 2021 Published by Elsevier Ltd.

引用

页数：15

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