Year : 2013, Volume : 38, Issue : 1to4
First page : ( 196) Last page : ( 201)
Print ISSN : 0379-0479. Online ISSN : 2349-2120. Published online : 2013  3.

Performance estimation of miniature inertance tube pulse tube cryocooler.

Rajesh T N¹, Kuzhiveli Biju T.¹

¹National Institute of Technology, Calicut, Kerala-673601, India.

Abstract

The work is focused in modelling and performance comparison of in-line model of Inertance tube Pulse tube cryocooler a detailed analysis of the flow and temperature variation in various components of the above mentioned models under oscillating flow conditions is carried out. The components of inertance tube pulse tube cryocooler are compressor, transfer line, aftercooler, regenerator, cold heat exchanger, pulse tube, hot heat exchanger, inertance tube and the buffer. The mathematical model consists of the full set of compressible conservation equations with the assumption of axisymmetry. The regenerator is modelled using porous approximation. Studies are conducted with a different L/D ratio of the inertance tube. The performance of different L/D ratio for pulse tube is also analyzed. The no-load temperature achieved in the cold heat exchanger in all the cases is compared The simulations reveal interesting time dependent flow patterns that develop in the pulse tube due to fluctuation caused by the piston and the presence of inertance tube.

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Keywords

Cryocooler, Pulse tube, Inertance tube.

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