Design and experimental investigation of the high efficiency 1.5 W/4.2 K pneumatic-drive G-M cryocooler |
| |
Affiliation: | 1. Chinese Academy of Sciences Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China |
| |
Abstract: | The development of a high cooling power and high efficiency 4.2 K two stage G-M cryocooler is critically important given its broad applications in low temperature superconductors, MRI, infrared detector and cryogenic electronics. A high efficiency 1.5 W/4.2 K pneumatic-drive G-M cryocooler has recently been designed and developed by ARS. The effect of expansion volume rate and operation conditions on the cooling performance has been experimentally investigated. A typical cooling performance of 1.5 W/4.2 K has been achieved, and the minimum temperature of the second stage is 2.46 K. The steady input power of the compressor at 60 Hz is 6.8 kW, while the operation speed of the rotary valve is 30 rpm. A maximum cooling power of 1.75 W/4.2 K has been obtained in test runs. |
| |
Keywords: | High efficiency Pneumatic-drive G-M cryocooler Expansion volume rate Operation condition |
本文献已被 ScienceDirect 等数据库收录! |
|