Structural Optimization And Experimental Study Of A Loudspeaker-driven Thermoacoustic Refrigerator

Due to the advantages of simple structure, reliable operation, and using non-harmful refrigerant, thermoacoustic refrigerator supplies a new solution for the refrigeration and cryogenics field. And it shows a vast application prospect in many places such as areo-spac, cryo-electron, and so on. Given for these advantages, it is becoming a research hotspot for researchers all around the world.In this paper, the background and significance of research was introduced firstly. Thermoacoustic theory, the experimental research progress and the development trend of thermoacoustic engine in future were reviewed, and basic theory of thermoacoustic refrigeration was introduced in detail. Contrapose the shortcomings of the loudspeaker driven thermoacoustic refrigerator in the laboratory, professional software Delta EC was used to simulate and optimize the system, which is based on linear thermoacoustic theory, and theoretical calculation for structure parameters of resonance tubes such as length and diameter was finished, in order to achieve a good match with the system. The influence of the regenerator position and length on thermoacoustic conversion efficiency was analysed, designing a new kind of hot side heat exchanger, which had good heat exchange efficiency in the experiment.A quarter wave loudspeaker driven thermoacoustic refrigerator was built based on theoretical calculation. Also, its performance was analyzed and forecasted. Experimental research was carried on this thermoacoustic refrigerator, and research had been done on three regenerators whose plate thickness was0.2mm, and plate spacing varies were0.4mm,0.5mm and0.6mm respectively. The experimental results showed that the resonance frequency of the system is at367Hz; the maximum temperature drop is10.9K; the regenerator with plate spacing0.4mm has a better performance than the other two; the temperature of hot end of the regenerator maintains the same with room temperature, which shows the good performance of the hot heat-exchanger.36pictures,2tables,70references...