抄録
We built and tested a double-loop thermoacoustic cooler consisting of an engine-loop, a branch resonator, and a cooler-loop. The cooling power of 6.4W was obtained at the cooling temperature of 0℃, when the input heat power of 416W was supplied to the engine-loop. We measured the acoustic power and found that the acoustic power emitted from the engine-loop was 12W, and that the acoustic power entering the cooler-loop was 6W. From the measured acoustic power, we obtained the efficiency of 0.029 in the engine-loop, and 1.1 in the cooler-loop. These correspond to 5.3% and 8.1% of the respective Carnot efficiencies.
