밀폐관형 열음향 냉동기의 주피수 및 압력변화 연구

An Experimental Study on the Frequency and Pressure Variation of a Closed-tube-type Thermoacoustic Refrigerator

A thermoacoustic refrigerator has not only considerable feasibility but also commercial usability, because it has high reliability, lower vibration, no moving part. and easy construction. In the present study, the resonant characteristics of a thermoacoustic refrigerator, varying the length of resonant tube from 400mm to 850mm, were investigated to improve performance. In order to determine the optimum position of the stack in the resonant tube and the optimum frequency, the simple open-tube-type thermoacoustic refrigerator was constructed. Air was used as a coolant. In the fifth harmonic, the largest $\DeltaT$ was $52.6^{\circ}C$ at 827Hz, tube length of 400mm, and stack length of 40mm.