Study on Thermoacoustic Cooling System Using a Resonance Tube to Induce One-Wavelength Mode Resonance

The property of a loop tube connected with a one-wavelength resonance tube is experimentally investigated. The one-wavelength resonance tube has one open end and its length is a quarter of the total length of the loop tube. The resonance tube is connected at the antinodal position of the sound pressure induced by a heat pump. While the node of the sound pressure is then formed at the open end, the antinode of the sound pressure appears at the connecting position. Since this condition coincides with a one-wavelength mode, the one-wavelength resonance is surmised to be attained by connecting the resonance tube. The experiment heat energy demonstrates the validity of the above prediction. It is also found that, when the heat supplied is 270 W, for example, the cooling ability of the loop tube using the resonance tube is enhanced so as to induce a temperature decrease of as much as 26 °C, while that induced using the conventional loop tube is only 9 °C.