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Computation of surface radiation and natural convection in a heated horticultural greenhouse

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  • Mezrhab, Ahmed
  • Elfarh, Larbi
  • Naji, Hassan
  • Lemonnier, D.

Abstract

This study analyses the effects of the radiation exchange inside a horticultural greenhouse, under winter climatic conditions, according to the number of squared heating tubes used. These ones, hot and isothermal, are equidistant inside the greenhouse volume. The governing differential equations are discretized using a finite volume method and the coupling pressure-velocity problem is carried out by the SIMPLER algorithm. The algebraic systems obtained are solved by a conjugate gradient method. Results are reported in terms of isotherms, streamlines and average Nusselt number for Rayleigh number of 103-106. The contour lines show that the radiative effects are noted near the solid surfaces, and become increasingly important when the Rayleigh number increases. As a result, the rise in the value of Rayleigh number leads to an increase of the overall heat transfer within the greenhouse.

Suggested Citation

  • Mezrhab, Ahmed & Elfarh, Larbi & Naji, Hassan & Lemonnier, D., 2010. "Computation of surface radiation and natural convection in a heated horticultural greenhouse," Applied Energy, Elsevier, vol. 87(3), pages 894-900, March.
    • Handle: RePEc:eee:appene:v:87:y:2010:i:3:p:894-900
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    References listed on IDEAS

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    1. Mezrhab, A. & Bouali, H. & Amaoui, H. & Bouzidi, M., 2006. "Computation of combined natural-convection and radiation heat-transfer in a cavity having a square body at its center," Applied Energy, Elsevier, vol. 83(9), pages 1004-1023, September.
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    Cited by:

    1. Biswal, Pratibha & Basak, Tanmay, 2017. "Entropy generation vs energy efficiency for natural convection based energy flow in enclosures and various applications: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 80(C), pages 1412-1457.
    2. Lingayat, Abhay Bhanudas & Chandramohan, V.P. & Raju, V.R.K. & Meda, Venkatesh, 2020. "A review on indirect type solar dryers for agricultural crops – Dryer setup, its performance, energy storage and important highlights," Applied Energy, Elsevier, vol. 258(C).
    3. Chen, Chao & Ling, Haoshu & Zhai, Zhiqiang (John) & Li, Yin & Yang, Fengguang & Han, Fengtao & Wei, Shen, 2018. "Thermal performance of an active-passive ventilation wall with phase change material in solar greenhouses," Applied Energy, Elsevier, vol. 216(C), pages 602-612.
    4. Lamidi, Rasaq. O. & Jiang, L. & Pathare, Pankaj B. & Wang, Y.D. & Roskilly, A.P., 2019. "Recent advances in sustainable drying of agricultural produce: A review," Applied Energy, Elsevier, vol. 233, pages 367-385.

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