Performance improvement of a large capacity GM cryocooler

Cryogenic Engineering Conference 2017

材料科学;物理学

Wang, C.^1 ; Olesh, A.^1 ; Cosco, J.^1

Cryomech Inc., 113 Falso Drive, Syracuse

NY

13211, United States^1

关键词: Carnot efficiency;    Cooling Capacity;    Displacers;    G-m cryocooler;    Operating parameters;    Performance improvements;    Power input;    Vibration forces;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012166/pdf
DOI  :  10.1088/1757-899X/278/1/012166

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper presents the improvement of a large GM cryocooler, Cryomech model AL600, based on redesigning a cold head stem seal, regenerator, heat exchanger and displacer bumper as well as optimizing operating parameters. The no-load temperature is reduced from 26.6 K to 23.4 K. The cooling capacity is improved from 615 W to 701W at 80 K with a power input of 12.5 kW. It has the highest relative Carnot Efficiency at 15.4%. The vibration of AL600 is investigated experimentally. The new displacer bumper significantly reduces the vibration force on the room temperature flange by 82 % from 520 N to 93 N.