【作者】 孙大明； 邱利民； 严伟林； 陈萍； 谭永祥； 陈国邦；

【Author】 Sun Daming Qiu Limin Yan Weilin Chen Ping Tan Yongxiang Chen Guobang (Cryogenics Laboratory, Zhejiang University, Hangzhou 310027, China)

【机构】 浙江大学制冷与低温工程研究所；

【摘要】 采用热声发动机驱动热声制冷机可以消除整个低温系统的运动部件,可望从根本上解决低温制冷机的可靠性问题。行波热声发动机回热器内进行的是可逆热声转换过程,因而在驱动热声制冷机时有望得到较高的热力学效率。对自制行波热声发动机进行了实验研究,以氮气和氦气为工质分别获得了1．212和1．19的最大压比。首次采用该热声发动机驱动脉管制冷机,以氦气为工质,驱动单级小孔型脉管制冷机获得了119K 的低温。更多还原

【Abstract】 Driving a pulse tube cooler by a thermoacoustic engine completely eliminates moving parts in the cryogenic system, which promises to radically resolve the reliability problem in cryocoolers. Because reversible thermoacoustic conversion process occurs in its regenerator, traveling-wave thermoacoutic engines have higher thermodynamic efficiency in driving thermoacoustic refrigerators. Further investigation was carried out on the self-made Stirling thermoacoustic engine. With nitrogen and helium as working gases, the pressure ratio of the engine reached 1.212 and 1.19 respectively. And for the first time, a pulse tube cooler was driven by the engine. Charged with helium of 2.0 MPa, the single stage orifice pulse tube cooler driven by the engine reached 119K.更多还原