高效室温行波热声制冷的研究 第一部分 方案及热力分析

Study on Efficient Theromoacoustic Refrigeration Modes in Room Temperature Range

文中对简化的热声网络法、T型传输线网络法以及传输矩阵法进行了比较讨论。采用简化的热声网络法对几种可能的制冷流程进行了分析 ,并确定出了可能高效工作的制冷方案。最后基于传输矩阵法对一种行波热声制冷机进行了分析和热力设计 ,得到该制冷机较优的结构参数。当制冷温度为 - 2 3℃时 ,其 COP可达 2 .86 ,相对卡诺热效率为 5 7%。

According to linear thermoacoustic theory, the three models based on lumped-parameter network, T-type transmission-line network and transmission matrix are discussed for analysis of thermoacoustic systems, respectively. Then several operating modes for achieving efficient thermoacoustic refrigeration are analyzed with the lumped-parameter network modeling. Finally, a feasible thermoacoustic refrigeration mode is studied and optimized for efficiently achieving a cooling capacity of 80W at the temperature of -23℃. The results show that the trermoacoustic refrigerator can achieve COP of 2.86 and a relative Carnot efficiency of 57%.