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Experimental and Analytical Performance of Gas Gap Cryogenic Thermal Switch using N2 gas


Mr. Khalid Siddiqui , Shankersinh Vaghela Bapu Institute of Technology, Vasan, Gandhinagar; Mr. Bhavesh parekh, Shankersinh Vaghela Bapu Institute of Technology, Vasan, Gandhinagar


Thermal Conductivity; Gas Gap; Thermal switch.


Heat switches are important devices in many cryogenic setups, especially in space applications and many systems have been used to allow a good ability to make or break a thermal contact. Among them, the so-called gas gap heat switches are known to be very reliable and simple due to the nonexistence of moving parts. The ON (conducting) state of the switch are obtained by varying the gas pressure and OFF (insulating) are obtained by creating vacuum in gap. In this paper, the gas gap cryogenic thermal switch is fabricated and tested using LN2 storage vessel. The thermal characteristics (Conductance in the ON and OFF state) of a "Gas Gap Heat Switch" are obtained experimentally and analytically using nitrogen as exchange gas. It is concluded that for both ON and OFF state, thermal conductance increases as heat load increases.

Other Details

Paper ID: IJSRDV1I9029
Published in: Volume : 1, Issue : 9
Publication Date: 01/12/2013
Page(s): 1802-1805

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