Development of a high-frequency coaxial multi-bypass pulse tube refrigerator below 14K

Zhou, Qiang; Chen, Liubiao; Zhu, Xiaoshuang; Zhu, Wenxiu; Zhou, Yuan; Wang, Junjie

doi:10.1016/j.cryogenics.2015.01.006

Cited by 25 publications

(5 citation statements)

References 6 publications

(10 reference statements)

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“…This offers several advantages, including compactness, low mechanical vibration, and high reliability. At present, the lowest reported temperature of a single-stage PTC can reach 13.9 K [3] . It is a multi-bypass type PTC, and its regenerator is composed of two diameter regenerators.…”

Section: Introductionmentioning

confidence: 87%

Development of a 35 K single-stage coaxial pulse tube cryocooler

Wang,

Zhao,

Lei

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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A high-efficiency, single-stage coaxial pulse tube cryocooler has been developed for the purpose of operating at approximately 35 K, specifically targeting long-wavelength infrared detectors. The present study outlines the design considerations and discusses the optimizations made to the length of the regenerator. By conducting experimental investigations, the prototype of the cooler has successfully achieved a no-load temperature of 24 K. This was accomplished by incorporating an inertance tube and reservoir as the phase-shifter. By incorporating the double-inlet into the phase-shifter, it is possible to attain a lower temperature of 21 K. At present, the current cooler prototype demonstrates a cooling capacity of 2 W at 35 K with an input power of 200 W at a frequency of 37 Hz. Additionally, a comprehensive presentation of the key parameters and performance of the designed PTC is provided.

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Section: Introductionmentioning

confidence: 87%

Development of a 35 K single-stage coaxial pulse tube cryocooler

Wang,

Zhao,

Lei

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Unfortunately, the double-inlet bypass was still without exception employed as the component of vital importance to attain the respective goals. Sometimes the multi-bypass geometry [9] had also to be employed as a key approach, which in fact transformed an apparent single-stage arrangement into an actual two-stage one, and furthermore, the magnetic or rare earth material was also additionally employed in the colder stage [9]. In our development, as discussed above, a coaxial geometry without either double-inlet or multi-bypass approach is adopted.…”

Section: Introductionmentioning

confidence: 97%

“…A SPTC with the coaxial arrangement has strong appeal to these applications, but one of the key problems is to enhance its cooling efficiency [7]. In recent years, several impressive attempts [8][9] have been made to achieve a much lower no-load temperature with the coaxial arrangement. Unfortunately, the double-inlet bypass was still without exception employed as the component of vital importance to attain the respective goals.…”

Section: Introductionmentioning

confidence: 99%

CFD modeling and experimental verification of a single-stage coaxial Stirling-type pulse tube cryocooler without either double-inlet or multi-bypass operating at 30–35 K using mixed stainless steel mesh regenerator matrices

Dang

Zhao

2016

Cryogenics

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“…However, the presence of gas streaming effects and dispersion mechanisms within the pulse tube can decline its performance and cooling efficiency. [9][10][11][12][13][14] In this paper, we aim to provide a comprehensive overview on those gas streaming effects for both single-stage and multistage PTC by showcasing the flow streamlines for varying cold end loads through computational fluid dynamics (CFD) simulations. Through our analysis, the vortices are observed inside the pulse tube with different heat loads for both single-stage and two-stage PTC.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on non-linear streaming effects in a two-stage coaxial pulse tube cryocooler

Moudghalya,

Nerale

et al. 2024

Physics of Fluids

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Stirling pulse tube cryocoolers (PTC) are widely used in aerospace applications for the cooling of infrared sensors and for filtering background thermal noise in the astro-imaging devices, etc. Present investigation aims to use numerical methods to demonstrate the nonlinear fluid flow, heat transfer, and vortex generation phenomena in a two-stage coaxial type inertance pulse tube cryocooler. The numerical simulation is conducted using commercially available Fluent® code for both single-stage and multi-stage configurations to show nonlinear processes with varying heat load conditions. It has been noticed that the width of the vortex produced inside the pulse tube grows with an increase in heat load capacity. This undesirable flow conditions yields an adverse effect in the cooling behavior and reduces overall performance of cryocooler with higher heat load. Additionally, streamlines, stream function, pressure and temperature variation plots are given for both stages with different heat load capacity to substantiate our results.

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Development of a high-frequency coaxial multi-bypass pulse tube refrigerator below 14K

Cited by 25 publications

References 6 publications

Development of a 35 K single-stage coaxial pulse tube cryocooler

Development of a 35 K single-stage coaxial pulse tube cryocooler

CFD modeling and experimental verification of a single-stage coaxial Stirling-type pulse tube cryocooler without either double-inlet or multi-bypass operating at 30–35 K using mixed stainless steel mesh regenerator matrices

Numerical investigation on non-linear streaming effects in a two-stage coaxial pulse tube cryocooler

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