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中文摘要：
本文介绍了最低制冷温度达60.5 K的高频300 Hz热驱动单级脉冲管制冷机。为进一步提高耦合系统热效率,在数值计算的指导下,系统研究了高频脉冲管制冷机冷头结构对耦合系统性能的影响特性。采用4.0 MPa氦气为工质,在发动机端加入600 W加热量获得了60.5 K的无负荷最低制冷温度,这是目前国际上报道的高频热驱动单级脉冲管制冷机的最低制冷温度。加入500 W加热量时,制冷机获得了63 K的无负荷最低制冷温度,在80 K时有1.16 W的制冷量,耦合系统热效率获得进一步显著提升。
英文摘要：
This paper introduces a 300 Hz thermoacoustically driven pulse tube cryocooler whose lowest temperature reached 60.5 K.In order to further improve the thermal efficiency,with the guidance of numerical simulation,the influence of cold-head structure on the system performance was studied in detail.With 4 MPa helium as working gas and 600 W heating power,a lowest cold-head temperature of 60.5 K was achieved,which is the lowest temperature ever reported in the world. Moreover,with 500 W heating power,a cold-head temperature of 63 K and 1.16 W cooling power at 80 K were obtained,indicating great improvement of thermal efficiency.
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