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Thermal analysis of porous volumetric receivers of concentrated solar dish and tower systems

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  • Reddy, K.S.
  • Nataraj, Sundarraj

Abstract

In this article, thermal analysis of Solar volumetric receiver used in concentrated solar thermal power systems is studied. A cylindrical volumetric receiver used in the parabolic dish collector and solar power tower is analyzed using a finite element method based tool COMSOL multiphysics software. A non uniform Gaussian distribution based heat influx is applied at the receiver to mimic the actual conditions. The steady state operation of the receiver is studied for various porosity and thermal conductivity of the solid phase. Different parameters of Gaussian distributions corresponding to different flux profile conditions are studied. The Gaussian profile heat flux amounting to 1 MW/m2 results in the Gaussian like temperature distribution of the fluid phase near the receiver exit region. Higher thermal conductivity of 200 W/(m K) coupled with the high porosity of 0.7 leads to the better operational efficiency of the receiver. Lower porosity results in higher peak temperature in the fluid phase and higher thermal conductivity laterally spreads the temperature across the receiver. The intermittent solar flux condition is realized through transient response study of flux conditions. The temperature gain rate in transient case is found to be approximately 24 K/s while the temperature drop is around 29 K/s.

Suggested Citation

  • Reddy, K.S. & Nataraj, Sundarraj, 2019. "Thermal analysis of porous volumetric receivers of concentrated solar dish and tower systems," Renewable Energy, Elsevier, vol. 132(C), pages 786-797.
    • Handle: RePEc:eee:renene:v:132:y:2019:i:c:p:786-797
    DOI: 10.1016/j.renene.2018.08.030
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    References listed on IDEAS

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    Cited by:

    1. Navalho, Jorge E.P. & Pereira, José C.F., 2020. "A comprehensive and fully predictive discrete methodology for volumetric solar receivers: application to a functional parabolic dish solar collector system," Applied Energy, Elsevier, vol. 267(C).
    2. Yu, Qiang & Fu, Peng & Yang, Yihui & Qiao, Jiafei & Wang, Zhifeng & Zhang, Qiangqiang, 2020. "Modeling and parametric study of molten salt receiver of concentrating solar power tower plant," Energy, Elsevier, vol. 200(C).
    3. Shahzada Zaman Shuja & Bekir Sami Yilbas & Hussain Al-Qahtani, 2019. "Thermal Assessment of Selective Solar Troughs," Energies, MDPI, vol. 12(16), pages 1-20, August.

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