A research of micro-pulse tube cryocooler with displacer phase shifter

Guo, Zhaorui; Pfotenhauer, John M.; Miller, Flagg; Zhu, Shaowei

doi:10.1016/j.applthermaleng.2021.117995

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…Where " is the permeability and # is the inertial resistance factor. The porosity is given by [10] = $ %&' ( 4×0.0 54 (5) Where n is the mesh number, and ) * is the wire diameter. The hydraulic diameter is given by:…”

Section: The Cfd Model Of the Cold Fingermentioning

confidence: 99%

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The simulation and experiments of a high frequency single stage pulse tube cryocooler with two cooled thermal sinks

Gao,

Li,

Feng

et al. 2024

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

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In the application of infrared detectors, pulse tube cryocoolers are required to provide cooling power at different temperature ranges simultaneously with light weight and compact construction. In this paper, a single stage pulse tube cryocooler was designed to provide cooling power at different temperature ranges with an extra cooled thermal sink placed in the middle of the regenerator. The axial distribution of volume flow and pressure wave of cryocooler with middle heat exchanger and without middle heat exchanger were compared theoretically. To verify the simulation results, a series of experiments were carried out. As a result, the cooling power of cryocoolers with middle heat exchanger was decreased at 80 K, and 0.5 W @ 88.5 K & 0.5 W @ 195.8 K of cooling power was obtained simultaneously at 45 W input power.

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Section: The Cfd Model Of the Cold Fingermentioning

confidence: 99%

“…In 2022, Guo invented a miniature pulse tube cryocooler and used the warm displacer as the phase shifter. A 2D CFD model was established to simulate the cooling performance of the cryocooler and a cooling power of 1.5 W @ 80 K was obtained in the experiment [5] .…”

Section: Introductionmentioning

confidence: 99%

The simulation and experiments of a high frequency single stage pulse tube cryocooler with two cooled thermal sinks

Gao,

Li,

Feng

et al. 2024

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

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“…As we all know, the fan speed needs to be reasonably matched with the cooling requirements of the cooling system to avoid overcooling or overheating. In order not to cause deformation of the workpiece affecting the machining accuracy and avoid burning the tool, reliable cooling is required [10]. The hydraulic oil of the machine tool adopts the air cooling mode, and the cooling system of the machine tool will have insufficient heat dissipation capacity in the extreme high temperature and plateau environment [11].…”

Section: Introductionmentioning

confidence: 99%

Research on Heat Generation Law and Cooling System Performance of Hydraulic System of Combined Machine Tool

Zhang,

Liu,

Tong

et al. 2023

Energies

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After the machine tool works continuously, the temperature of the hydraulic system continues to rise, which affects the work efficiency of the machine tool. Therefore, it is very important to control the temperature within a reasonable range. This paper proposes an improved scheme to replace a single fan with dual fans to improve the heat dissipation capacity of the radiator. Starting from the principle of heat exchange between oil and air, the relationship between the oil temperature and the wind speed on the face of the heat exchanger is derived, and the theoretical basis of the cooling system is given. Combined with logic control, the fan has the advantages of fast action, high efficiency and low energy consumption, which ensures the efficient and reliable operation of the machine tool. A one-dimensional simulation model of the thermal hydraulic system is established, and the heat generation and heat dissipation power of each element are calculated. Among them, the heat dissipation of the radiator is the largest, accounting for about 55% of the total heat dissipation. The experimental results show that the optimal fan speed is 3200 r/min and the flow rate is 0.2 m3/s at 26 °C. The thermal balance temperature of the hydraulic system is reduced from the original 65 °C to 58 °C, and its cooling capacity meets the requirements of a high-altitude and high-temperature environment.

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Progress in and Outlook for Work Recovery Type Pulse Tube Refrigerator

Zhu

2023

Advanced Topics in Science and Technology in China

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A research of micro-pulse tube cryocooler with displacer phase shifter

Cited by 6 publications

References 26 publications

The simulation and experiments of a high frequency single stage pulse tube cryocooler with two cooled thermal sinks

The simulation and experiments of a high frequency single stage pulse tube cryocooler with two cooled thermal sinks

Research on Heat Generation Law and Cooling System Performance of Hydraulic System of Combined Machine Tool

Progress in and Outlook for Work Recovery Type Pulse Tube Refrigerator

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