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In this paper synchronous effects of multi-mesh regenerator and
double-inlet on performance of a Stirling pulse tube cryocooler (SPTC) have
been considered. In this respect, a finite volume code was developed to
simulate the SPTC. Set of governing equations were written in a general
form such that all porous and non-porous sections of the system could be
modeled. Results showed that synchronous application of double inlet and
multi-mesh regenerator optimizes the phase shift between velocity and
pressure at the warm end of the pulse tube, increases the regenerator's
outlet pressure amplitude, decreases inertial and viscous losses in the hot
end of the regenerator and consequently increases the COP of the system.
Furthermore, it was observed that a minimum temperature of 60.3K and COP of
0.03996 @ 80K is attainable using optimum multi-mesh regenerator and double
inlet; whereas, for a simple SPTC with a uniform mesh regenerator, a
minimum temperature of 71.3K and maximum COP of 0.0227 @ 80K are concluded.
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