The techniques of cooling down cryogen are used to make superconductors superducting state at very low temperature, 4 K. This paper studied on the temperature characteristic of liquid helium dewar. The dewar has a 30 L liquid helium capacity, a hold t...
The techniques of cooling down cryogen are used to make superconductors superducting state at very low temperature, 4 K. This paper studied on the temperature characteristic of liquid helium dewar. The dewar has a 30 L liquid helium capacity, a hold time of 5 days. The dewar has two thermal shield, 150K and 40K. The temperature was measured at the end of thermal shield and was compared with the thermal analysis. The thermal analysis of helium dewar were carried out with a finite element method program, ANASYS 10. The simulation result has predicted similar temperature data in manufactured helium dewar.