Study on the impedance characteristics of a high-capacity pulse tube cryocooler

Energy Reports

Yifei Xin¹  Limin Qiu²  Hua Zhang³  Junliang Lu³  Xiaokuan You³ 

[1]Corresponding author.

[2]Institute of Refrigeration and Cryogenics, Zhejiang University, 38 Zheda Road, Zhejiang 310027, China

[3]School of Energy and Power Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China

关键词: Pulse tube cryocooler;    Energy conversion efficiency;    Impedance maps;    Cooling performance;   

DOI  :  

来源: DOAJ

【 摘 要 】

Stirling-type pulse tube cryocoolers are used in many applications such as military facilities, aerospace devices and superconductive systems. A major problem in improving its energy conversion efficiency is how to achieve a better impedance matching. In this study, a pulse tube cryocooler is investigated based on the impedance analyses. A group of impedance maps is proposed to analyze the energy conversion performance of the compressor. The velocity map, the efficiency map, the acoustic power map and the phase angle map are provided under the total equivalent impedance. These maps offer a visualized guidance of the maximum performance a compressor could reach and in which direction to optimize. Experiments on a high capacity pulse tube cryocooler are conducted to verify the theoretical analyses. The results show that it is of great help in using the proposed maps to analyze and improve the energy conversion performance of the cryocooler. A cooling capacity of 300W@80K is finally achieved. The study clearly reveals the influence of the impedance on the energy conversion efficiency and it is quite useful in improving the performance of the pulse tube cryocooler.

【 授权许可】

Unknown