Heat transfer enhancement and performance of the molten salt receiver of a solar power tower

Yang, Minlin; Yang, Xiaohu; Yang, Xiaoping; Ding, Jing

doi:10.1016/j.apenergy.2009.04.042

Cited by 96 publications

(27 citation statements)

References 3 publications

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“…Yao et al [95] presented modeling and simulation of DAHAN, the pioneer 1 MW central receiver using a software tool HFLD. Yang et al [96] investigated the interaction between the heat transfer performance and the thermal efficiency of a molten salt receiver used in the solar power tower plant. The results of the experiment show that by using the spiral tube as the heat transfer tube, the heat transfer performance of the molten salt receiver is obviously improved, and the radiation and convection losses are significantly reduced.…”

Section: Solar Thermal Power Generation Systems With Central Tower Rementioning

confidence: 99%

Thermodynamic performance evaluation of solar and other thermal power generation systems: A review

Gupta¹,

Kaushik

Ranjan

et al. 2015

Renewable and Sustainable Energy Reviews

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Section: Solar Thermal Power Generation Systems With Central Tower Rementioning

confidence: 99%

Thermodynamic performance evaluation of solar and other thermal power generation systems: A review

Gupta¹,

Kaushik

Ranjan

et al. 2015

Renewable and Sustainable Energy Reviews

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“…Because of this self cleaning action, helical heat exchangers are widely used for handling two phase flow (Ramachandran et al, 2008). Yang et al (2009) investigated the heat transfer performance and the thermal efficiency of a molten salt receiver with spiral tubes in a solar tower. The authors report three times better heat transfer than with straight tubes.…”

Section: Helical or Spiral Heat Exchangersmentioning

confidence: 99%

Design considerations for concentrating solar power tower systems employing molten salt.

Moore¹,

Siegel²,

Kolb³

et al. 2010

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The Solar Two Project was a United States Department of Energy sponsored project operated from 1996 to 1999 to demonstrate the coupling of a solar power tower with a molten nitrate salt as a heat transfer media and for thermal storage. Over all, the Solar Two Project was very successful; however many operational challenges were encountered. In this work, the major problems encountered in operation of the Solar Two facility were evaluated and alternative technologies identified for use in a future solar power tower operating with a steam Rankine power cycle. Many of the major problems encountered can be addressed with new technologies that were not available a decade ago. These new technologies include better thermal insulation, analytical equipment, pumps and values specifically designed for molten nitrate salts, and gaskets resistant to thermal cycling and advanced equipment designs. 4 5

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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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Heat transfer enhancement and performance of the molten salt receiver of a solar power tower

Cited by 96 publications

References 3 publications

Thermodynamic performance evaluation of solar and other thermal power generation systems: A review

Thermodynamic performance evaluation of solar and other thermal power generation systems: A review

Design considerations for concentrating solar power tower systems employing molten salt.

Molten salt flow and heat transfer in paddle heat exchangers

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