Design and construction of a two-stage thermoacoustic electricity generator with push-pull linear alternator
Design and construction of a two-stage thermoacoustic electricity generator with push-pull linear alternator
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DOI：
10.1016/j.energy.2017.11.148
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发表时间：
2018-02
期刊：
影响因子：
9
通讯作者：
Ahmed Hamood;Artur J. Jaworski;Xiaoan Mao;Kevin Simpson
中科院分区：
文献类型：
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作者：
Ahmed Hamood;Artur J. Jaworski;Xiaoan Mao;Kevin Simpson
行波热声热机是一种将热能转化为声能的热机，通过线性交流发电机可以将热能转化为电能。热声热机可以在很宽的热质范围内工作，使其具有用于余热回收的能力。本文提出了一种新型的环管行波热声发动机结构，它由两个相同的级组成，每个级都有一个功率提取点，连接这两个点的直线发电机以“推挽”方式工作。与文献中已知的多个线性交流发电机的使用相比，这实现了更有效的声阻抗匹配。实验室演示器已经设计，建造和测试。所施加的热源温度与内燃机废气的温度相似，以探索使用该装置从公路或海上运输中回收废热的潜力。在实验中，在28 bar的氦气作为工作流体和297 K的温差在回热器上实现了最大电功率48.6 W，热电效率约为6%。该设备的性能进行了分析，并使用DeltaEC模拟工具进行建模进行比较。
Travelling-wave thermoacoustic heat engine is capable of converting heat to acoustic power which in turn can be used to generate electricity by a linear alternator. The thermoacoustic heat engine can work in a wide range of heat quality, giving it the ability to be used for waste heat recovery. In this paper, a new configuration of looped-tube travelling wave thermoacoustic engine is proposed, which consists of two identical stages each having a power extraction point, and the linear alternator connecting these two points working in “push-pull” mode. This enables a more effective acoustic impedance matching compared to the use of multiple linear alternators known in the literature. The laboratory demonstrator has been designed, built and tested. The applied heat source temperature is similar to that of the internal combustion engine exhaust gases in order to explore the potential of using the device for waste heat recovery from road or marine transport. In experiments, the maximum electric power of 48.6 W at thermal-to-electric efficiency of around 6% was achieved with helium at 28 bar as working fluid and 297 K temperature difference across the regenerator. The performance of the device has been analysed and compared to modelling performed using DeltaEC simulation tool.