Determination of critical parameters in the EAST subcooled helium system

Geng, Maofei; Song, Yuntao; Cheng, Anyi; Hao, Feng; Zhang, Qiyong; Jiang, Qingfeng

doi:10.1016/j.fusengdes.2018.04.078

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…The EAST device built in China was successfully discharged for the first time in 2009 and occupies an important position in the field of international thermonuclear fusion research [6]. In the EAST experiment, the load of the cryogenic system is not constant.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of 5 kW helium turbine for EAST cryoplant

Chen

Zhang

Bao

et al. 2022

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

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The helium turbine is an important core component in the refrigerator, which provides support and guarantee for the stable operation of the cryogenic system. This paper refers to the parameters of one of the four helium turbines in EAST, designs a 5 kW helium turbine. The overall structure of the turbine has been described, and the design and analysis of the impeller and bearing have been carried out. Through CFD analysis, the internal pressure and temperature change law of the flow is analyzed. The variable-condition operating characteristics of the turbine are predicted, and it is found that the turbine can maintain efficient operation within a wide range of mass flow changes. The bearing performance is calculated by solving the Reynolds equation. After determining the optimal bearing clearance 28 μm based on the principle of maximum stiffness, bearing performance parameters of load capacity and stiffness can be further calculated.

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Section: Introductionmentioning

confidence: 99%

Design and analysis of 5 kW helium turbine for EAST cryoplant

Chen

Zhang

Bao

et al. 2022

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

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Liquid hydrogen centrifugal pump optimization based on reducing hydraulic loss and improving cavitation

Shao,

Zhao

2024

International Journal of Hydrogen Energy

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Analysis of internal temperature distribution and its total parasitic heat leak for a cryogenic cold Compressor

Dong

Shang

et al. 2020

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

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Cold compressors are the core component needed for the development of a facility for large-capacity refrigeration at superfluid helium temperatures. The compressor impeller is operated at extremely low temperature and low pressure which involves technical issues including material properties at low temperature, heat transfer, failures of the actuating motor resulting from overheating and performance penalty due to heat transfer from the warm side of the machine to the cold side. To address these issues, it is important to understand the temperature distribution inside the housing of the machine. To analyze the temperature distribution, an integrated numerical model is created on the basis of the model of the cold compressor structure and then simulated through computational fluid dynamics. The actual temperature rise of the cold compressor is measured at two temperature measuring points and compared with the temperatures predicted by the simulation to validate the accuracy of the model. The results show that the internal flow field around the motor and bearings of the cold compressor is completely turbulent and the total parasitic heat transfer to the cold gas stream is closely related to the rotating speed of the high-speed motor.

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Determination of critical parameters in the EAST subcooled helium system

Cited by 3 publications

References 13 publications

Design and analysis of 5 kW helium turbine for EAST cryoplant

Design and analysis of 5 kW helium turbine for EAST cryoplant

Liquid hydrogen centrifugal pump optimization based on reducing hydraulic loss and improving cavitation

Analysis of internal temperature distribution and its total parasitic heat leak for a cryogenic cold Compressor

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