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A multi-stage travelling wave thermoacoustic engine driven refrigerator and operation features for utilizing low grade energy

机译：多级行波热声发动机驱动的冰箱以及利用低品位能源的运行功能

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This paper mainly investigated a looped tube refrigerator driven by a three-stage travelling wave thermoacoustic engine (later simply called as thermacoustic engine-refrigerator system). The onset and steady operation features of this coupling thermoacoustic system are analyzed through the network model developed by the author's research group and the DeltaEC code, which is widely used in the thermacoustic research field. For power electronic thermal management utilizing low grade energy, a small scale three-stage travelling wave thermoacoustic engine-refrigerator system is designed. The onset features, steady performances and acoustic field features are analyzed in depth according to the simulation results. The analysis start with an investigation on the parametric sensitivity, followed by the description on the scaling and coupling impacts of this engine-refrigerator system on the onset temperature difference. The scaling impact is determined from the comparison results between a small scale and a large scale system, while the coupling impact is derived from the simulation of a refrigerator system and a simple engine system. The simulation results are also compared with the experimental data in publication, and the comparison demonstrated a desirable agreement. The main findings from this research work would provide some physical insights on the design and operating principles for the development of multi-stage thermoacoustic systems. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文主要研究由三级行波热声发动机（后来简称为热声发动机－制冷机系统）驱动的环形管式冰箱。通过作者研究小组开发的网络模型和在热声研究领域广泛使用的DeltaEC代码，分析了该耦合热声系统的启动和稳定运行特性。对于利用低级能量的电力电子热管理，设计了一种小型三级行波热声发动机-制冷机系统。根据仿真结果深入分析了起爆特征，稳定性能和声场特征。分析开始于对参数灵敏度的研究，然后是对这种发动机-制冷机系统对开始温度差的缩放和耦合影响的描述。比例影响是从小型系统和大型系统之间的比较结果确定的，而耦合影响是从冰箱系统和简单的发动机系统的模拟得出的。还将仿真结果与出版物中的实验数据进行了比较，该比较表明了理想的一致性。这项研究工作的主要发现将为开发多级热声系统提供有关设计和操作原理的物理见解。 （C）2016 Elsevier Ltd.保留所有权利。

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