Design and analysis of a pulse tube cryocooler for low temperature fridge

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Wang, N.L.^1^2 ; Zhao, M.G.^1 ; Quan, J.^1 ; Chen, H.L.^1 ; Liang, J.T.^1^2 ; Zhu, Q.L.^1^2 ; Cai, J.H.^1^2

Key Laboratory of Space Energy Conversion Technologies, Technical Institute of Physics and Chemistry, CAS, Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100190, China^2

关键词: Cold-end temperature;    Cooling power;    Design and analysis;    Electric power;    Low temperatures;    Pulse tube cryocoolers;    Single stage;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012028/pdf
DOI  :  10.1088/1757-899X/502/1/012028

来源: IOP

【 摘 要 】

The low temperature fridge is used for doing some experiments and storing some special products at the temperature of-80 ° C ∼-150 ° C. Compared with the conventional cascade fridge, the pulse tube cryocooler has the advantages of reliability, compactness, green refrigerant and large range of temperature, which has been considered as an ideal cryocooler for low temperature fridge. In order to design a PTC used in the temperature range of-80° C∼-150C, a numerical model of coaxial PTC is built by using the SAGE. Based on this model, the influence of regenerator length and regenerator diameter on optimal cold-end temperature are analyzed and the key parameters of cold finger are optimized to promote the COP. A single-stage coaxial PTC has been manufactured and tested in our laboratory. And some experiments are conducted to promote the performance of PTC by optimizing the frequency, phase shifter and mesh. Finally, the performance of the coaxial PTC are presented at different electrical powers. This PTC typically provides a cooling power of 31 W at 160K with a corresponding electric power of 200W.