Theoretical evaluation of stack-based thermoacoustic refrigerators

Abstract Standing wave thermoacoustic refrigerator uses stack, is the heart of cooling system. The porous stack in resonator tube develops temperature difference across for heat pumping upon loudspeaker sound interaction oscillating gas. In this paper, optimization stack-heat exchangers system and discussed using linear theory better COP power refrigerator. assumed to provide required acoustic with back volume gas spring Helium air are chosen because their thermophysical properties cost, compared other competent gases. 200 mm diameter optimized 28 K. theoretical results models DeltaEC simulation deriving conclusions. predicts 349 W at 0.998 helium, 139 1.133 air, respectively.