Heat transfer to supercritical water in a 2×2 rod bundle

Gu, Haihua; Li, H.B.; Hu, Zhiyuan; Liu, D.; Zhao, Meng

doi:10.1016/j.anucene.2015.04.020

Cited by 32 publications

(10 citation statements)

References 14 publications

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“…The lowest wall temperatures occur at the surface facing the center channel as Tw1 at Z4 and Tw3 at Z8. The wall temperature distribution characteristics are similar to those observed in bare rod bundle [9].…”

Section: Characteristics Of Heat Transfer In the Rod Bundlesupporting

confidence: 76%

“…In general, the effects of system parameters on the heat transfer to supercritical water in the rod bundle with wire wraps are similar to those observed in bare bundle or annular channel [9,24,25].…”

Section: Parameter Effectsmentioning

confidence: 54%

“…However, the work on the effect of spacers, in particular the wire wraps type, on the heat transfer to supercritical water is very few. The heat transfer to supercritical water in a 2 Â 2 bare rod bundle with the same geometry as the test section in the present work has been performed in our lab [9]. Fig.…”

Section: Parameter Effectsmentioning

confidence: 99%

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Experimental study on heat transfer to supercritical water in 2×2 rod bundle with wire wraps

et al. 2016

Experimental Thermal and Fluid Science

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Section: Characteristics Of Heat Transfer In the Rod Bundlesupporting

confidence: 76%

Section: Parameter Effectsmentioning

confidence: 54%

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Experimental study on heat transfer to supercritical water in 2×2 rod bundle with wire wraps

et al. 2016

Experimental Thermal and Fluid Science

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“…Several experimental studies have been performed at supercritical conditions in trying to understand fluid flow and heat transfer at these supercritical conditions. Some of these experimental studies include studies carried out by Yamagata et al [20]; Li et al [1]; Liao and Zhao [19]; Zhang et al [21]; Zhao et al [15]; Wang et al [3]; and Gu et al [22] [23] [24]. Detailed descriptions of experimental studies by some of the aforementioned researchers and by others can be found in literature reviews by Cheng and Schulenberg [4], Duffey and Pioro [25], Pioro and Duffey [26], and Pioro and Duffey [5].…”

Section: ) Experimental and Numerical Studies In Heat Transfermentioning

confidence: 99%

Performance of Heat Transfer Correlations Adopted at Supercritical Pressures: A Review

Shitsi¹,

Debrah²,

Agbodemegbe³

et al. 2018

WJET

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Research activities involving heat transfer at supercritical pressures have attracted attention in recent years because of possibility of increase in thermal output of heat transfer and industrial equipment. Because of high pressure and temperature conditions associated with heat transfer at supercritical pressures, only few experimental heat transfer studies are being carried out at supercritical conditions. The use of numerical tools for heat transfer and other related studies at supercritical pressures is increasing because of the high-pressure-temperature limitation of experimental studies at supercritical conditions. Heat transfer correlations implemented in these numerical tools are used to obtain numerical heat transfer data to complement experimental heat transfer data provided through experimental studies. In order to further broaden the understanding of fluid flow and heat transfer, this review examines the performance of heat transfer correlations adopted at supercritical pressures. It is found from the review that most of the correlations could predict heat transfer quite well in the low enthalpy region and few of the correlations could predict heat transfer in the high enthalpy region near critical and pseudo-critical conditions (heat transfer deteriorated conditions). However, no single heat transfer correlation is able to accurately predict all the experimental results presented in this work.

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“…There are some recent experimental studies on 2 Â 2 rod bundles with supercritical water as working fluid [2][3][4]. Several correlations were assessed against the test data from the experimental studies, and it has been concluded that the best correlations compared are those of the Jackson and Fewster [5] and Bishop et al [6].…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation Study on Forced Convection Heat Transfer to Water at Supercritical Pressure in a Trapezoid Annulus

Amin

Duan

2017

Journal of Nuclear Engineering and Radiation Science

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It is now well known that heat transfer to fluid at supercritical pressure in a confined channel shows complex behaviors. This is due to the strong variations of the thermal–physical properties resulting from the changes of pressure and temperature. To improve the reliability and efficiency of the supercritical water-cooled reactors (SCWRs) to be designed, the understanding of supercritical fluid flow in the fuel assemblies is very important. The study reported here reconsiders a simplified geometry made of a trapezoid channel enclosing an inner rod to simulate the triangular arrangement of a fuel assembly. Large eddy simulation (LES) with the wall adapting local eddy viscosity (WALE) model is used to simulate the forced convection flow in the channel. Supercritical water at 25 MPa is used as the working fluid. The Reynolds number of flow based on the hydraulic diameter and the bulk velocity is 10,540, while the heat flux from the inner rod wall has been varied from 10 kW/m2 to 75 kW/m2. Large unsteady flow structures are observed to be present due to the nonuniformity of the cross section of the flow channel. The characteristics of the flow structures and their effect on the local heat transfer are analyzed using instantaneous velocities, spectrum analysis, and correlation analysis. The swinging flow structures in the wide gap are much weaker than those in the narrow gap. The behaviors of such large flow structures are influenced by the strong spatial and temporal variations of the properties. When the temperature distribution follows Tb < Tpc < Tw, the mixing parameters due to the large flow structures, including mixing coefficient and effective mixing velocity in the gap, are also significantly influenced.

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Heat transfer to supercritical water in a 2×2 rod bundle

Cited by 32 publications

References 14 publications

Experimental study on heat transfer to supercritical water in 2×2 rod bundle with wire wraps

Experimental study on heat transfer to supercritical water in 2×2 rod bundle with wire wraps

Performance of Heat Transfer Correlations Adopted at Supercritical Pressures: A Review

Large Eddy Simulation Study on Forced Convection Heat Transfer to Water at Supercritical Pressure in a Trapezoid Annulus

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