A numerical study has been made for the predication of the performance of inertance tube pulse tube refrigerator (ITPTR). Here basically the effect of amplitude of the piston in compressor on the performance of ITPTR has been investigated. At first, a specific geometry of ITPTR with a particular compressor-amplitude (from Cha et al., 2006) has been numerically modelled and studied and the results has been compared (with Cha et al., 2006) for the validation purpose. Then another one geometry of ITPTR has been considered and the amplitudes of this ITPTR compressor piston has been varied in two different ways under the same boundary conditions. In the first case of second geometry, the amplitude doubled but the swept volume of compressor remain same as in the reference compressor (taken from Cha et al., 2006) and in the second case of second geometry, both the amplitude and volume of the compressor are doubled from the same reference compressor. The Finite Volume Method has been adopted here for all the present numerical simulations. The result shows the effect of variation of amplitude on the performance of ITPTR.
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