Heat transfer to supercritical water in a vertical tube with concentrated incident solar heat flux on one side

Zhang, G.; Li, Y.; Dai, Yanjun; Wang, R.Z.

doi:10.1016/j.ijheatmasstransfer.2016.01.011

Cited by 13 publications

(2 citation statements)

References 14 publications

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“…The results show that the buoyancy effect is much stronger in upward flow than in downward flow, and the local deterioration is not as severe as uniformly heated cases. Zhang et al [39] proposed the relation between the threshold incident solar heat flux and mass flux for the supercritical water to avoid deterioration in the heat transfer of supercritical water for one-side heating. Qu and Yang [40] experimentally and numerically investigated heat transfer of ultra-supercritical water in a vertical upward tube under uniform heating and nonuniform heating conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Heat Transfer to Supercritical Water in Vertical Tube under Semicircular Heating Condition

Wang

2019

Energies

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In-depth understanding and analysis of turbulent convection heat transfer of supercritical water under semicircular heating conditions play a major role in system design and security. The inaccurate numerical results on simulating the buoyancy effect under deterioration heat transfer cases are partly attributed to the invalidity of the turbulent model. An improved turbulence model, which is validated suitable to three-dimensional model, is adopted in the present paper to numerical simulated flow and heat transfer in a vertical tube under semicircular heating condition. Heat transfer deterioration phenomenon occurs under semicircular heating condition, while the degree of deterioration is weakened due to the influence of variable physical properties and buoyancy effect. The velocity profile is distorted into “M-shape” in the heating side and present parabolic distribution in the adiabatic side, leading to different deterioration mechanisms under semicircular heating condition compared with uniform heating. The larger density difference between the heating side and the adiabatic side increases the shear stress production of turbulent kinetic energy; turbulent development is much faster recovery than the phenomenon in uniform heating condition. The results show that the semicircular heating condition can effectively alleviate the degree of heat transfer deterioration in a vertical tube.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Heat Transfer to Supercritical Water in Vertical Tube under Semicircular Heating Condition

Wang

2019

Energies

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“…The sum of direct, diffused and reflected radiation is called the global solar radiation [2]. Solar energy is received on earth, in the form of short wave radiation travelled through space and air [3]. After travelling through space and air, the maximum part of radiations comes straight to the surface called beam radiation; however some portion gets diffused in air named as diffuse radiation.…”

Section: Introductionmentioning

confidence: 99%

Concentrated solar power technology in India: A review

Bijarniya

Sudhakar

Baredar

2016

Renewable and Sustainable Energy Reviews

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Analysis of grid spacer effects on the flow and heat transfer of supercritical water flow in an inner sub-channel of a SCWR based on the second law of thermodynamics

Zhao

et al. 2018

Applied Thermal Engineering

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Heat transfer to supercritical water in a vertical tube with concentrated incident solar heat flux on one side

Cited by 13 publications

References 14 publications

Numerical Investigation of Heat Transfer to Supercritical Water in Vertical Tube under Semicircular Heating Condition

Numerical Investigation of Heat Transfer to Supercritical Water in Vertical Tube under Semicircular Heating Condition

Concentrated solar power technology in India: A review

Analysis of grid spacer effects on the flow and heat transfer of supercritical water flow in an inner sub-channel of a SCWR based on the second law of thermodynamics

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