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Wind-induced convective heat loss of cylindrical receiver considering the effect of dish concentrator

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  • Xiao, Lan
  • He, Song
  • Shen, Zu-Guo
  • Wu, Shuang-Ying
  • Chen, Zhi-Li

Abstract

A numerical model by coupling Monte Carlo Ray Tracing (MCRT) and Computational Fluid Dynamics (CFD) was built to explore the convective heat loss of a cylindrical receiver with built-in coiled tube. Noted that the non-uniform heat flux boundary of the receiver was obtained by optical simulation and the effect of existence of the dish concentrator was taken into account. The variation of flow field and convective heat loss with inclination α, wind direction φ, wind velocity V were analyzed in detail. The results indicate that the presence of concentrator in a windy environment can significantly interfere with the air flow thus affecting the convective heat loss of receiver, and such effect gradually weakens with the increase of α. Except for the case of φ = -90° and 0°≤α ≤ 17°, the convective heat loss with concentrator is always less than that without concentrator. The effect of φ on convective heat loss is complicated and has a great relationship with both V and α. In most cases except for φ = 0°, the convective heat loss takes on a trend of first decreasing and then increasing with varying α. Additionally, a Nusselt number correlation for predicting the convective heat loss of receiver under the effect of dish concentrator was proposed.

Suggested Citation

  • Xiao, Lan & He, Song & Shen, Zu-Guo & Wu, Shuang-Ying & Chen, Zhi-Li, 2022. "Wind-induced convective heat loss of cylindrical receiver considering the effect of dish concentrator," Renewable Energy, Elsevier, vol. 182(C), pages 900-912.
    • Handle: RePEc:eee:renene:v:182:y:2022:i:c:p:900-912
    DOI: 10.1016/j.renene.2021.10.077
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    References listed on IDEAS

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    1. Cheng, Z.D. & He, Y.L. & Cui, F.Q., 2013. "A new modelling method and unified code with MCRT for concentrating solar collectors and its applications," Applied Energy, Elsevier, vol. 101(C), pages 686-698.
    2. Qiu, Yu & He, Ya-Ling & Cheng, Ze-Dong & Wang, Kun, 2015. "Study on optical and thermal performance of a linear Fresnel solar reflector using molten salt as HTF with MCRT and FVM methods," Applied Energy, Elsevier, vol. 146(C), pages 162-173.
    3. Ngo, L.C. & Bello-Ochende, T. & Meyer, J.P., 2015. "Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins," Renewable Energy, Elsevier, vol. 74(C), pages 95-105.
    4. Loni, R. & Kasaeian, A.B. & Askari Asli-Ardeh, E. & Ghobadian, B. & Gorjian, Sh, 2018. "Experimental and numerical study on dish concentrator with cubical and cylindrical cavity receivers using thermal oil," Energy, Elsevier, vol. 154(C), pages 168-181.
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    Cited by:

    1. Rajan, Abhinav & Reddy, K.S., 2023. "Integrated optical and thermal model to investigate the performance of a solar parabolic dish collector coupled with a cavity receiver," Renewable Energy, Elsevier, vol. 219(P1).
    2. Jian, Yan & Peng, You Duo & Liu, Yong Xiang, 2022. "An optical-mechanical integrated modeling method of solar dish concentrator system for optical performance analysis under service load," Energy, Elsevier, vol. 261(PB).

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