扬声器驱动的小型化行波热声制冷机:数值设计

Oday S. Mahmood, A. Karim, S. G. Yahya, Itimad D. J. Azzawi
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引用次数: 1

摘要

普通的制冷系统,如蒸汽压缩冰箱,是工业上常用的设备,主要是因为它们的高效率。然而,由于它们的操作制冷剂,它们对臭氧的消耗和全球变暖做出了重大贡献。因此,热声制冷可以是一个很好的备选,它使用惰性气体,如空气,氦和氮作为主要制冷剂。热声制冷机将声功率(声波)转化为热效应(冷却功率)。热声学技术是一门在热应用领域具有巨大发展潜力的新技术。本研究旨在设计并制造一种可由普通扬声器驱动的小型化行波热声制冷机。制冷机的优化数值设计表明,在冷热交换器和环境热交换器之间的温差为25 K时,制冷机的总效率(冷却功率除以输入功率)接近66%。在性能系数(COP)为2.65时,最大估计冷却功率为65[公式:见文]。
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Miniaturized Traveling-Wave Thermoacoustic Refrigerator Driven by Loudspeaker: Numerical Design
Ordinary refrigeration systems such as vapor-compression refrigerators are the commonly used devices in industry, mostly for their high efficiencies. However, they make a significant contribution to the depletion of Ozone and global warming due to their operational refrigerants. Hence, thermoacoustic refrigeration can be a great alternative candidate which uses inert gases such as air, helium and nitrogen as the primary refrigerant. Thermoacoustic refrigerators convert the acoustic power (sound waves) into a thermal effect (cooling power). Thermoacoustics can be counted as a new technology that has a strong potential toward the development of the thermal applications. This study aims to design and fabricate miniaturized traveling wave thermoacoustic refrigerator which can be driven by an ordinary loudspeaker. The optimized numerical design of the refrigerator shows an overall efficiency (cooling power over input electricity) of nearly 66% at a temperature difference of 25[Formula: see text]K (between cold and ambient heat exchangers). The maximum estimated cooling power is 65[Formula: see text]W at coefficient of performance (COP) of 2.65.
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来源期刊
CiteScore
2.70
自引率
10.00%
发文量
0
期刊介绍: As the only international journal in the field of air-conditioning and refrigeration in Asia, IJACR reports researches on the equipments for controlling indoor environment and cooling/refrigeration. It includes broad range of applications and underlying theories including fluid dynamics, thermodynamics, heat transfer, and nano/bio-related technologies. In addition, it covers future energy technologies, such as fuel cell, wind turbine, solar cell/heat, geothermal energy and etc.
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