Numerical Study on a Looped Thermoacoustic Refrigerator with Multi-layered Mesh Screen Regenerators
Thermoacoustic refrigeration technology,known for its high reliability and significant environmental friendli-ness,relies heavily on the performance of the regenerator.To efficiently pump heat at different temperatures in the regenera-tor,a four-stage looped thermoacoustic refrigerator utilizing a multi-layered mesh regenerator is proposed and numerically simulated.The computational results indicate that the design of a multi-layered regenerator is conducive to ensuring efficient heat exchange while reducing viscous dissipation,thereby enhancing refrigeration capacity and efficiency.Among the inves-tigated configurations,the system performance is most optimal with a three-layer mesh regenerator.Under the conditions of using 6 MPa high-pressure helium gas,a hot end temperature of 923 K,and a room temperature end of 303 K,the refrigera-tion system achieved a cooling capacity of 109 W at 77 K,surpassing the conditions with one,two and four-layer regenera-tors.