FUSED SALT HEAT TRANSFER. PART II. FORCED CONVECTION HEAT TRANSFER IN CIRCULAR TUBES CONTAINING NaF-Kf-LiF EUTECTIC

Hoffman, H.W.; Lones, J.

doi:10.2172/4016896

Cited by 53 publications

(59 citation statements)

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“…Convective heat transfer of molten salts has been evaluated over a four-decade period by Hoffman at ORNL [33], Grele at NASA [34], Vriesema at Delft University in the Netherlands [35], and by Ignat'ev in Russia [36]. These studies have shown that molten salts follow the general correlations of turbulent heat transfer of fluids as described by the Dittus-Boelter and Chilton-Colburn models.…”

Section: Bi Previous Literaturementioning

confidence: 99%

“…The data from Hoffman [33], Grele [34], and Vriesema [35] were evaluated using different values for the physical properties. Each set of data was re-evaluated using the same physical properties to compare the data from the different investigators.…”

Section: Biii Heat Transfer Calculationsmentioning

confidence: 99%

“…The first analysis only looked at the data obtained by Hoffman [33] and Grele [34] to determine why an offset in the convection coefficient was seen in the different metal tubes. The data from the molten salt heat transfer experiment showed a different convective coefficient if the salt was flowing through an Inconel tube versus a stainless steel or nickel tube.…”

Section: Biii Heat Transfer Calculationsmentioning

confidence: 99%

“…For each set of data, h r , accounted for less than 0.6% of the heat transferred to the salt using α = 0.27 cm -1 and k = 0.6 W/m K. This analysis therefore suggests that radiant heat transfer to the salt from the different metal tubes was not the reason for the offset in the data for the different metal containers. A 2-D computer model of each test section used by Hoffman and Grele [33,34] was modeled in FLUENT to compare the computer simulation with the experimental values reported. The input parameters for the code were the heat flux, velocity, and the inlet salt temperature.…”

Section: Biii Heat Transfer Calculationsmentioning

confidence: 99%

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Molten Salt Heat Transport Loop: Materials Corrosion and Heat Transfer Phenomena

Sridharan¹,

Anderson²,

Corradini³

et al. 2008

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Section: Bi Previous Literaturementioning

confidence: 99%

Section: Biii Heat Transfer Calculationsmentioning

confidence: 99%

Section: Biii Heat Transfer Calculationsmentioning

confidence: 99%

Section: Biii Heat Transfer Calculationsmentioning

confidence: 99%

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Molten Salt Heat Transport Loop: Materials Corrosion and Heat Transfer Phenomena

Sridharan¹,

Anderson²,

Corradini³

et al. 2008

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“…Paddle dryer is then given a more general name -paddle heat exchanger as its application is beyond the scope of drying. Although molten salt flow and heat transfer in simple ducts and some applications (e.g., solar thermal power systems) have been investigated extensively [10][11][12][13][14][15][16][17][18][19][20], no research on molten salt paddle heat exchangers is presented.…”

Section: Introductionmentioning

confidence: 99%

Molten salt flow and heat transfer in paddle heat exchangers

Zhang¹,

Du²,

Liu³

et al. 2016

IJHT

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Constructal law has inspired a large amount of work in fluid flow and heat transfer analysis, design and optimization. In this paper the authors will investigate high temperature (~ 500℃ ) molten salt flow and heat transfer characteristics in paddle heat exchangers (more general name of paddle dryers) by invoking constructal law idea and CFD tools. The research shows that among three typical paddle-shaft structures, open hollow paddle-shaft structure transfers more heat than solid paddleshaft structure and closed hollow paddle-shaft structure for specified inclined angle of paddles and inlet flow rate. The performance superiority of open hollow paddle-shaft structure demonstrates the design optimization direction or constructal evolving direction. Next, under the constraint of the outside surface shape which is determined by the flow of outside materials, the effects of the open hole position, size, non-finned angle, as well as the pressure drop (in dimensionless form, Bejan number) on flow and heat transfer for open hollow paddles are calculated. There exists an open hole position at which pressure drop and heat transfer rate approach maximum simultaneously for specified flow rates. The flow rate and heat transfer rate increase significantly as the hole diameter increases. When the non-finned angle decreases, the heat transfer rate increases whereas the change of the flow rate is not monotonous. Finally, the comparison of original and modified rotary joints shows that internal heat insulation combined with external cooling reduces the average temperature in the sealing packing domain greatly which helps improve the sealing performance under high molten salt temperature conditions. The present work provides more insight in molten salt flow and heat transfer in paddle heat exchangers and provides reference data for design engineers.

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