28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Experimental Research of a Hybrid 4K J-T Cryocooler

Not scheduled
2h
JW Marriott Starr Pass Resort

JW Marriott Starr Pass Resort

Tucson, Arizona USA
Poster Presentation CEC-04 - Cryocoolers (Aerospace)

Speaker

Dr Yanjie Liu (Technical Institute of Physics and Chemistry CAS)

Description

Key Laboratory of Space Energy Conversion Technologies of TIPC, CAS has developed a 4.5K Joule-Thomson (J-T) refrigerator precooled by a three-stage pulse tube cooler. In this paper, special attention is paid to the characteristics of the J-T cycle, so a commercial two-stage GM cryocooler is used to provide precooling for the J-T cycle for the purpose of shorten experimental time. The analysis of the system performance results at different operating conditions are presented and discussed in detail. When only the power consumption of J-T compressors is considered, the COP (coefficient of performance) of the refrigerator is calculated to evaluate the performance of J-T cycle. Influence of charge pressure on cooling capacity is analyzed. Then experimental research is carried out to validate the theoretical result and cooling capacity of 12mW is gained at 4.5K. Orifice of different diameters is also studied to explore the effect of throttling resistance on the performance of J-T cooler. In order to increase pressure ratio, two compressors are used in J-T cryocooler, but experimental results of one stage compression is also demonstrated to confirm the necessity of the second stage compressor.

Primary author

Dr Yuexue Ma (Technical Institute of Physics and Chemistry CAS)

Co-authors

Prof. JingTao Liang (Technical Institute of Physics and Chemistry CAS) Dr Juan Wang (Technical Institute of Physics and Chemistry CAS) Dr Yanjie Liu (Technical Institute of Physics and Chemistry CAS)

Presentation Materials

There are no materials yet.