Numerical Simulation of Three-Phase Coupling for High-Temperature Lithium Heat Pipe

Mao Shang; Zhou Tao; Liu Wenbin; Wei Dong; Xue Chunhui

doi:10.13832/j.jnpe.2022.06.0037

Volume 43 Issue 6

Dec. 2022

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Mao Shang, Zhou Tao, Liu Wenbin, Wei Dong, Xue Chunhui. Numerical Simulation of Three-Phase Coupling for High-Temperature Lithium Heat Pipe[J]. Nuclear Power Engineering, 2022, 43(6): 37-42. doi: 10.13832/j.jnpe.2022.06.0037

Citation:

Mao Shang, Zhou Tao, Liu Wenbin, Wei Dong, Xue Chunhui. Numerical Simulation of Three-Phase Coupling for High-Temperature Lithium Heat Pipe[J]. Nuclear Power Engineering, 2022, 43(6): 37-42. doi: 10.13832/j.jnpe.2022.06.0037

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Numerical Simulation of Three-Phase Coupling for High-Temperature Lithium Heat Pipe

doi: 10.13832/j.jnpe.2022.06.0037

Mao Shang^{1, 2, 3
,},
Zhou Tao^{1, 2, 3
,
,},
Liu Wenbin^{1, 2, 3},
Wei Dong^{1, 2, 3},
Xue Chunhui^{1, 2, 3}

1.
Department of Nuclear Science and Technology, School of Energy and Environment, Southeast University, Nanjing, 210096, China
2.
Institute of Nuclear Thermal-hydraulic Safety and Standardization, Nanjing, 210096, China
3.
National Engineering Research Center of Power Generation Control and Safety, Nanjing, 210096, China

Received Date: 2021-12-03
Rev Recd Date: 2022-05-09
Publish Date: 2022-12-14

Abstract

Abstract

To study the heat transfer mechanism of lithium heat pipes and to improve their application in small reactors, a solid-liquid-gas three-phase coupled model of the tube wall, the wick and the vapor chamber inside the tube is developed using COMSOL Multiphysics software. The results show that when the heat flow in the evaporation section increases from 13.9 kW to 20.8 kW, the pipe wall temperature, steam temperature, steam pressure, liquid pressure inside the wick, and liquid axial velocity increase with the increase of heating power, while the steam axial velocity first increases and then decreases with the increase of heating power. In the steady-state operation, the pipe wall temperature decreases step by step, while the vapor temperature and pressure remain basically unchanged, indicating that the lithium heat pipe has good isothermality.
- High-temperature heat pipe,
- Lithium heat pipe,
- Coupling model,
- Numerical simulation

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References(19)

References

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