CFD Sensitivity Study of Stirling High Temperature Components Based on Heat Pipe Heat Transfer

You Ersheng; Li Yiyi; Xing Dianchuan; Jiang Shunli; Wang Tianmi; Xu Jianjun

doi:10.13832/j.jnpe.2025.S1.0220

Volume 46 Issue S1

Jul. 2025

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You Ersheng, Li Yiyi, Xing Dianchuan, Jiang Shunli, Wang Tianmi, Xu Jianjun. CFD Sensitivity Study of Stirling High Temperature Components Based on Heat Pipe Heat Transfer[J]. Nuclear Power Engineering, 2025, 46(S1): 220-227. doi: 10.13832/j.jnpe.2025.S1.0220

Citation:

You Ersheng, Li Yiyi, Xing Dianchuan, Jiang Shunli, Wang Tianmi, Xu Jianjun. CFD Sensitivity Study of Stirling High Temperature Components Based on Heat Pipe Heat Transfer[J]. Nuclear Power Engineering, 2025, 46(S1): 220-227. doi: 10.13832/j.jnpe.2025.S1.0220

Citation:

You Ersheng, Li Yiyi, Xing Dianchuan, Jiang Shunli, Wang Tianmi, Xu Jianjun. CFD Sensitivity Study of Stirling High Temperature Components Based on Heat Pipe Heat Transfer[J]. Nuclear Power Engineering, 2025, 46(S1): 220-227. doi: 10.13832/j.jnpe.2025.S1.0220

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CFD Sensitivity Study of Stirling High Temperature Components Based on Heat Pipe Heat Transfer

doi: 10.13832/j.jnpe.2025.S1.0220

You Ersheng^{1, 2
,},
Li Yiyi^{1, 2},
Xing Dianchuan^{1, 2},
Jiang Shunli^{1, 2},
Wang Tianmi^{1, 2},
Xu Jianjun^{1, 2}

1.
National Key Laboratory of Nuclear Reactor Technology, Nuclear Power Institute of China, Chengdu, 610213, China
2.
CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2025-01-06
Rev Recd Date: 2025-03-10
Publish Date: 2025-06-15

Abstract

Abstract

The heat pipe-Stirling coupling structure refers to the geometric and heat transfer interface between heat pipe bundles and the Stirling generator in the heat-pipe nuclear reactor system, responsible for transferring core heat from the heat pipes to the helium working fluid inside the Stirling engine. This study employs the computational fluid dynamics (CFD) method to numerically analyze the heat transfer process in the heat pipe-Stirling coupling structure, investigating the influence of various cold and hot boundary conditions on characteristic parameters such as effective heat transfer capacity, total temperature difference, and temperature distribution on the channel surface. The results show that the heat transfer capacity of helium side has a certain influence on the heat transfer process, and increasing the convective heat transfer coefficient or decreasing the helium temperature is beneficial to further improve the effective heat transfer. In contrast, the boundary conditions on the heat pipe side have a greater influence on the heat transfer process, which may cause a large temperature gradient at the initial position of the coupling structure and obviously increase the total heat transfer temperature difference, thus affecting the heat transfer safety of the heat pipe. Therefore, it is necessary to improve the heat transfer capability from heat pipes to Stirling high-temperature components while limiting the maximum heat flux density below 150 kW/m² to ensure thermal safety during heat pipe reactor system operation.
- Boundary condition sensitivity,
- Computational fluid dynamics (CFD) calculation,
- Stirling heat transfer unit,
- Heat pipe reactor

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References(16)

References

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