2019
DOI: 10.1002/eng2.12044
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Effect of valve opening shapes on the performance of a single‐stage Gifford‐McMahon cryocooler

Abstract: In this work, the effect of the triangular and Gaussian‐shaped opening of the rotary valve (ie, the valve timing diagram of high‐pressure and low‐pressure valves) on the performance of a single‐stage Gifford‐McMahon (GM) cryorefrigerator is numerically investigated. In addition, the effect of waiting time of the rotary valve on its cooling power and coefficient of performance is studied for both types of opening shapes. The governing equations representing the fluid flow and heat transfer behaviors of the refr… Show more

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Cited by 8 publications
(1 citation statement)
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“…The simulation results suggested that regenerative materials with high porosity placed in the warm end of regenerator can reduce the pressure drop. In 2019, Panda et al [ 16 ] introduced the experimental empirical correlation to represent the fluid flow and heat exchange characteristics in the regenerator based on Xu's work [ 12 ]. The author further studied the shape of orifice and waiting time in rotary valve, which indicated that smaller waiting time and Gaussian-shaped port can acquire more PV work in the expansion chamber, so as to obtain higher cooling power.…”
Section: Introductionmentioning
confidence: 99%
“…The simulation results suggested that regenerative materials with high porosity placed in the warm end of regenerator can reduce the pressure drop. In 2019, Panda et al [ 16 ] introduced the experimental empirical correlation to represent the fluid flow and heat exchange characteristics in the regenerator based on Xu's work [ 12 ]. The author further studied the shape of orifice and waiting time in rotary valve, which indicated that smaller waiting time and Gaussian-shaped port can acquire more PV work in the expansion chamber, so as to obtain higher cooling power.…”
Section: Introductionmentioning
confidence: 99%