新型热声制冷-双作用行波热声制冷机热力特性的数值模拟研究

对一种新型热声制冷系统—双作用行波热声制冷机进行了研究,设计了一台在气液双作用行波热声发动机上使用的行波制冷机,并通过数值模拟优化了制冷机的结构尺寸。在环境温度300K,制冷温度250K的条件下,新型的双作用制冷机的COP达到了2.74,相对卡诺效率接近60%,声功消耗为534W,制冷量为1464.9W。通过对传统的斯特林制冷机及不同结构的行波制冷机计算比较。结果表明:从压比、效率、制冷量等多角度考察,新型的双作用行波制冷机更适合与气液双作用行波热声发动机耦合工作。它具有潜在的高效率、热驱动及无运动部件的优点,非常有潜力成为常规制冷方式的一种替代技术。

Numerical Study on Thermodynamic Performance of a Novel Thermoacoustically Driven Refrigerator---Double-acting Traveling-wave Thermoacoustic Refrigerator

A new thermoacoustic refrigerator which is driven by a double-acting traveling-wave thermoacoustic engine have been researched and designed. Through numerical simulation, we optimize the structure parameters of the refrigerator. Under the design conditions, the new refrigerator reaches a COP of 2.74, a relative Carnot efficiency of 60%, a consumed P-V power of 534W, and a cooling capacity of 1464.9W. In addition, a traditional Stirling refrigerator and the new thermoacoustic refrigerator with double-action operation are calculated and compared for operating pressure ratio, efficiency, cooling capacity and other features, and the simulated results show that the new thermoacoustic refrigerator is very efficient and suitable for coupling with a double-action, traveling-wave thermoacoustic engine. Thermoacoustic refrigerator with double-action operation has good potential as an alternative of ordinary refrigeration technology due to intrinsic high efficiency heat driven mechanism, no moving components and environmental friendliness, etc.