Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5444211 | Cryogenics | 2016 | 5 Pages |
Abstract
Seeking a higher specific power of the pulse tube cryocooler is an important trend in recent studies. High frequency operation (100Â Hz and higher), combined with co-axial configuration, serve as a good option to meet this requirement. This paper introduces a high efficiency co-axial pulse tube cryocooler operating at around 100Â Hz. The whole system weighs 4.3Â kg (not including the radiator) with a nominal input power of 320Â W, namely, power density of the system is around 74Â W/kg. The envelop dimensions of the cold finger itself is about 84Â mm in length and 23Â mm in outer diameter. Firstly, numerical model for designing the system and some simulation results are briefly introduced. Distributions of pressure wave, the phase difference between the pressure wave and the volume flow rate and different energy flow are presented for a better understanding of the system. After this, some of the characterizing experimental results are presented. At an optimum working point, the cooling power at 80Â K reaches 16Â W with an input electric power of 300Â W, which leads to an efficiency of 15.5% of Carnot.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xiaomin Pang, Xiaotao Wang, Jian Zhu, Shuai Chen, Jianying Hu, Wei Dai, Haibing Li, Ercang Luo,