Abstract
The thermoacoustic system has attracted attention as an effective utilization of low-temperature waste heat. The purpose of this study is to enhance the performance of the thermoacoustic cooling system by examining the cooling characteristics of the thermoacoustic refrigerator. In this paper, a straight-tube type thermoacoustic refrigerator is constructed and evaluated based on the temperature difference between the stack's edges and work intensity of sound by focusing on the geometric influence of the stack, such as the density and length. Air is employed as a working gas, and the sound source is supplied by a woofer speaker with a sound generator and power amplifier. As a result, the consumed energy in the stack increases as the length and density of the stack become longer and higher, and there is an optimum stack length to have a higher temperature difference between the stack's edges.
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