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Experimental study and analysis of a thermoacoustically driven thermoacoustic refrigerator
Sādhanā ( IF 1.6 ) Pub Date : 2020-08-28 , DOI: 10.1007/s12046-020-01452-9
A B DESAI , K P DESAI , H B NAIK , M D ATREY

Experimental investigations are performed on a half-wavelength standing wave type thermoacoustically driven thermoacoustic refrigerator also known as TADTAR. Present TADTAR device conceived to be a quarter wavelength standing wave type thermoacoustic engine (TAE) coupled to a quarter wavelength standing wave thermoacoustic refrigerator (TAR). A TAE generates acoustic work using heat, and this produced acoustic work is directly fed to TAR where a useful cooling effect is developed. The study here aims to project the enhancement in the performance of a TADTAR system by using better geometric choices and operating conditions. In the present work, by keeping the engine part unaltered, parametric variations on the refrigerator side are performed. Two geometric parameters namely resonator length and TAR stack position and one operating parameter, working gas, have been varied at three distinct choices. The performance of TADTAR is examined for three output parameters of TADTAR namely frequency of oscillations, pressure amplitude, and temperature difference across TAR stack. The present study should be useful for assisting select these parameters for starting the designing of a TADTAR. It also helps in concluding in a more generalized way the dependence of the above-said output of TADTAR on the varying parameters. This paper shows that longer resonator and He-Ar mixture as working gas among the choices is better for a TADTAR system for achieving better performance. It also highlights the potential existence of a unique position for a stack length for a TADTAR to attain maximum performance in terms of the temperature difference across the TAR stack. The present paper reports the maximum temperature difference of 16.3 K across the TAR stack.



中文翻译:

热声驱动热声制冷机的实验研究与分析

在半波长驻波型热声驱动热声制冷机(也称为TADTAR)上进行了实验研究。当前的TADTAR设备被认为是与四分之一波长驻波热声制冷机(TAR)耦合的四分之一波长驻波型热声引擎(TAE)。TAE使用热量产生声学功,然后将产生的声学功直接馈入TAR,从而产生有用的冷却效果。此处的研究旨在通过使用更好的几何选择和操作条件来预测TADTAR系统性能的增强。在本工作中,通过保持发动机部分不变,在冰箱侧进行参数变化。两个几何参数,即谐振器长度和TAR堆栈位置,以及一个工作参数,工作气体有三种不同的选择。对于TADTAR的三个输出参数(即振荡频率,压力幅度和整个TAR堆栈的温差),将检查TADTAR的性能。本研究对于帮助选择这些参数以开始设计TADTAR应该是有用的。它还有助于以更通用的方式得出上述TADTAR输出对各种参数的依赖性。本文表明,较长的谐振器和He-Ar混合物作为工作气体是选择TADTAR系统更好地实现更好性能的选择。它还强调了在TADTAR的烟囱长度上存在唯一位置的潜在位置,以实现整个TAR烟囱的温差方面的最佳性能。

更新日期:2020-08-28
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