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Research Papers

Numerical Analysis of Natural Convection and Radiation for Tube Solar Receiver With Glass Window

[+] Author and Article Information
Zhang Guojun, Liu Changyu, Li Dong

School of Architecture and Civil Engineering,
Northeast Petroleum University,
Daqing 163318, Heilongjiang Province, China

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received December 11, 2017; final manuscript received May 13, 2018; published online June 26, 2018. Assoc. Editor: M. Keith Sharp.

J. Sol. Energy Eng 140(6), 061008 (Jun 26, 2018) (7 pages) Paper No: SOL-17-1486; doi: 10.1115/1.4040291 History: Received December 11, 2017; Revised May 13, 2018

Conjugate laminar natural convection heat transfer and air flow with radiation of tube solar receiver with glass window were numerically investigated. The discrete ordinate method was used to solve the radiative transfer equation. And the three-dimensional steady-state continuity, Navier–Stokes, and energy equations were solved. The temperature difference based on environment and high temperature surface of receiver is varied from 100 K to 1000 K. The influence of the surface emissivity, heating temperature, convective coefficient, and convective temperature of environment on the heat transfer from the receiver with glass window has also been investigated. The numerical results indicated that the highest temperature of glass window increases and the high temperature area becomes wide, with the temperature of heating wall and surface emissivity increasing. Adopting higher convective coefficient of glass window can reduce the peak magnitude of temperature distribution on glass window of tube receiver up to 45%.

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References

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Figures

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Fig. 2

Comparison of temperature field of enclosure with the numerical results in the literature [20]: (a) this work and (b) in the literature

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Fig. 1

(a) Computational domain with boundary conditions and (b) plane section at center of tube receiver

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Fig. 3

Computational mesh

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Fig. 4

Comparison of the temperature profiles of the Z-axis at center tube receiver

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Fig. 7

Dimensionless temperature field of glass window: (a) Th = 373 K, (b) Th = 473 K, (c) Th = 673 K, (d) Th = 873 K, (e) Th = 1073 K, and (f) Th = 1273 K

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Fig. 8

Dimensionless temperatures of Z-axis with different emissivity: (a) 673 K and (b) 1073 K

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Fig. 9

Velocity fields of tube receiver with different emissivity (1073 K, Vmax = 0.024 m/s)

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Fig. 5

Temperatures of Z-axis in tube receiver

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Fig. 10

Temperature field of glass window surface (1073 K)

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Fig. 11

Dimensionless temperatures of Z-axis with different heat convective coefficient

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Fig. 6

Velocity fields of the tube receiver

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Fig. 12

Dimensionless temperature field of glass window surface with different heat convective coefficients: (a) h = 5 W/(m2 K), (b) h = 10 W/(m2.K), (c) h = 20 W/(m2 K), and (d) h = 40 W/(m2 K)

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Fig. 13

Dimensionless temperatures of Z-axis with different convective temperature

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