Abstract
Thermoacoustic cooling is one of promising technique tor utilization of unused thermal energy. The object of this paper is to stuay perrormance improvement of a loop-tube-type thermoacoustic cooler with branch resonator by optimization of the stack structure. In experiments, the cooling performance was measured by varying porosity of mesh in the stack and inner diameter of a phase adjuster. Firstly, the optimum thermal responsibility of stacks was determined in relation to phase difference between pressure and velocity of sound wave. Secondly, the structure of multi-mesh stack was designed to realizing local optimum thermal responsibility for distribution of phase difference in the stack. High performance of the proposed multi-mesh stack was indicated experimentally in comparison to single-mesh stack.
