CFD investigating thermal-hydraulic characteristics of FLiNaK salt as a heat exchange fluid

Ferng, Yuh-Ming; Lin, Keh-moh; Chi, Chen-Wei

doi:10.1016/j.applthermaleng.2011.11.021

Cited by 35 publications

(17 citation statements)

References 16 publications

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“…Hexahedral meshes were generated in the two regions, and computational fluid dynamics methods were utilized to model these processes. According to the previous studies of Ferng et al [35], Cheng et al [62], and Chang et al [63], the standard high-Re κ-ε model with the standard wall functions, which can predict the heat transfer and friction of the molten salts in turbulent tube flow 7 suitably, was selected in the current model.…”

Section: Modeling Of Heat Transfer and Flow In Tubementioning

confidence: 99%

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Numerical and experimental study on heat transfer and flow features of representative molten salts for energy applications in turbulent tube flow

Qiu

Sun

et al. 2019

International Journal of Heat and Mass Transfer

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This article investigated the heat transfer performance and flow friction of the molten salts in turbulent tube flow, where four salts including Hitec, Solar Salt, NaF-NaBF4, and FLiNaK were studied. A computational model was developed to analyze the flow and heat transfer features of the salts in the tube, and experiments were conducted to test the heat transfer performance of a representative salt Hitec in the tubes of a salt-oil heat exchanger. Comparison of simulation results with the experimental data shows that the average errors are smaller than ±4%, which validates the simulation model. Based on the model, firstly the influences of heat flux uniformity at the tube outer wall were examined. The results show that the non-uniform wall flux can lead to local high-temperature region but influences little on the flow friction coefficient and the heat transfer performance. Then, the model was utilized to investigate the friction and heat transfer features of the salts under broad ranges of the temperature and the velocity. Comparisons of the simulated heat transfer results with Hansen's, Sider-Tate's and Gnielinski's correlations show that the largest errors can reach +25%, +13% and-15%, respectively. Furthermore, the errors between the simulated friction coefficients and the Filonenko's correlation are smaller than ±2%, which indicates that this correlation is suitable for predicting the friction of the salts. Finally, to predict the heat transfer performance more accurately for these representative salts, a new correlation was developed. It was found that the errors between all simulation results and the proposed correlation are smaller than ±5%, while the corresponding values for 80% experiment data of three salts are also lower than ±5%. The current study can offer beneficial results and correlation for the applications of liquid salts in energy systems.

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Section: Modeling Of Heat Transfer and Flow In Tubementioning

confidence: 99%

“…However, it is quite difficult to do experiments under this condition. Hence, simulation approach can offer significant help investigating the flow and heat transfer features of the liquid salts [35].…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study on heat transfer and flow features of representative molten salts for energy applications in turbulent tube flow

Qiu

Sun

et al. 2019

International Journal of Heat and Mass Transfer

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“…Ferng et al [9] have carried out CFD simulation of FLiNaK using standard keε model. They validated the simulation results with the help of friction factor, Nusselt number, and hydraulic and thermal entrance length.…”

Section: Experimental and Cfd Studies On Heat Transfer Characteristicmentioning

confidence: 99%

Investigation of heat transfer characteristics and energy balance analysis of FLiNaK in turbulent boundary layers of pipe flow

Khanwale

Sona

Mathpati

et al. 2015

Applied Thermal Engineering

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“…A large body of work has been performed on uoride, nitrate, and carbonate salt mixtures, such as lithium beryllium uoride (FLiBe), [8][9][10][11] sodium potassium nitrate (NaNO 3 -KNO 3 ), 7,[12][13][14] lithium potassium carbonate (LiKCO 3 ), 15,16 and many others. [17][18][19] Chloride-based salt mixtures have several advantages over nitrates, carbonates, and uorides. They have higher maximum operation temperatures than their nitrate or carbonate counterparts, improving reactor efficiency.…”

Section: Introductionmentioning

confidence: 99%

Enabling chloride salts for thermal energy storage: implications of salt purity

et al. 2019

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CFD investigating thermal-hydraulic characteristics of FLiNaK salt as a heat exchange fluid

Cited by 35 publications

References 16 publications

Numerical and experimental study on heat transfer and flow features of representative molten salts for energy applications in turbulent tube flow

Numerical and experimental study on heat transfer and flow features of representative molten salts for energy applications in turbulent tube flow

Investigation of heat transfer characteristics and energy balance analysis of FLiNaK in turbulent boundary layers of pipe flow

Enabling chloride salts for thermal energy storage: implications of salt purity

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