Numerical Study on Heat Transfer Enhancement of Modified Wall in U-tube Steam Generator

Yuan Junjie; Liu Li; Gu Hanyang

doi:10.13832/j.jnpe.2022.S2.0094

Volume 43 Issue S2

Dec. 2022

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Yuan Junjie, Liu Li, Gu Hanyang. Numerical Study on Heat Transfer Enhancement of Modified Wall in U-tube Steam Generator[J]. Nuclear Power Engineering, 2022, 43(S2): 94-99. doi: 10.13832/j.jnpe.2022.S2.0094

Citation:

Yuan Junjie, Liu Li, Gu Hanyang. Numerical Study on Heat Transfer Enhancement of Modified Wall in U-tube Steam Generator[J]. Nuclear Power Engineering, 2022, 43(S2): 94-99. doi: 10.13832/j.jnpe.2022.S2.0094

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Numerical Study on Heat Transfer Enhancement of Modified Wall in U-tube Steam Generator

doi: 10.13832/j.jnpe.2022.S2.0094

School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

Received Date: 2022-07-20
Rev Recd Date: 2022-08-30
Publish Date: 2022-12-31

Abstract

Abstract

In order to achieve better heat transfer effect and reduce the possibility of pipe rupture caused by heat transfer deterioration, based on the improved lattice Boltzmann method (LBM) phase transition heat transfer model, the bubble dynamics behavior and wall heat transfer performance of working medium in U-shaped heat transfer tube of steam generator were studied numerically. The results show that compared with the pure hydrophilic wall, the hydrophobic zone promotes bubble nucleation, and the wall with mixed wettability can significantly increase the boiling heat transfer. The wall with mixed wettability can increase the critical heat flux (CHF) and delay the occurrence of CHF point, which can effectively reduce the possibility of heat transfer deterioration. Generally speaking, the distance and number of hydrophobic points determine the growth state of bubbles, the best boiling heat transfer performance can be obtained if there is an optimal setting of hydrophobic points, and the ideal heat transfer wall can be obtained by selecting appropriate distance and number of hydrophobic points.
- Steam generator U-tube,
- Enhanced heat exchange,
- Lattice Boltzmann method (LBM),
- Mixed wettability

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References(14)

References

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