Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5444154 | Cryogenics | 2017 | 4 Pages |
Abstract
This paper presents experimental results and numerical evaluation of a Vuilleumier (VM) type pulse tube cryocooler. The cryocooler consists of three main subsystems: a thermal compressor, a low temperature pulse tube cryocooler, and a Stirling type precooler. The thermal compressor, similar to that in a Vuilleumier cryocooler, is used to drive the low temperature stage pulse tube cryocooler. The Stirling type precooler is used to establish a temperature difference for the thermal compressor to generate pressure wave. A lowest no-load temperature of 15.1Â K is obtained with a pressure ratio of 1.18, a working frequency of 3Â Hz and an average pressure of 2.45Â MPa. Numerical simulations have been performed to help the understanding of the system performance. With given experimental conditions, the simulation predicts a lowest temperature in reasonable agreement with the experimental result. Analyses show that there is a large discrepancy in the pre-cooling power between experiments and calculation, which requires further investigation.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yanan Wang, Yuejing Zhao, Yibing Zhang, Xiaotao Wang, Srinivas Vanapalli, Wei Dai, Haibing Li, Ercang Luo,