Thermal conductivity studies on activated carbon based cryopanel

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

Verma, Ravi^1^2 ; Nagendra, H.N.^1^2 ; Kasthurirengan, S.^1 ; Shivaprakash, N.C.^2 ; Behera, Upendra^1

Centre for Cryogenic Technology, Indian Institute of Science, Bangalore, India^1

Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India^2

关键词: Aluminium powder;    Cryocoolers;    Cryopanels;    Cryosorption pumps;    Made-to-measure;    Pumping speed;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012197/pdf
DOI  :  10.1088/1757-899X/502/1/012197

来源: IOP

【 摘 要 】

The adsorbent temperature is one of the important parameters for pumping speed of cryosorption pump, which depends on thermal conductivity of the cryopanel. An attempt has been made to measure the thermal conductivity of the developed small size cryopanel which consist of a copper panel coated with adhesive to adhere the activated carbon adsorbent. This arrangement is similar to commercially available cryosorption pump. The thermal conductivity of the above panel has been measured with the help of cryocooler based experimental setup developed in our laboratory. The thermal conductivity of the cryopanel is further improved by mixing fine aluminium powder into the adhesive which in turn will cool the adsorbent to the lowest possible temperature. This will enhance the pumping speed of the crysorption pump. These studies on the thermal conductivity of cryopanels will be useful for the development of high performance cryosorption pumps.