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Performance evaluation of coiled tube receiver cavity for a concentrating collector

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  • Awasthi, Kuldeep
  • Khan, Mohd Kaleem

Abstract

This paper deals with the numerical simulation of laminar flow of water through the inverted conical cavity subjected to constant heat flux at its outer surface and inner surface being insulated usingANSYS FLUENT version 17.2. The numerical model is validated with our own experiments. The performance of inverted conical cavity has also been compared with the results of numerical simulation of flow through equivalent upright conical and cylindrical receiver cavities. The conical receiver cavities are useful in point focus solar concentrators. It has been noticed that the inverted conical cavity subjected to constant heat flux at its outer surface with inner surface being insulated is superior than the upright conical cavity subjected to constant heat flux at its inner surface with outer surface being insulated due to the following: (a) the outer surface is having larger area than the inner surface in a conical cavity (b) percentage of unutilized radiations is considerably higher in upright conical cavity. It has been established in the present study that use of conical cavity in an inverted position is always better as it gives nearly 27.6% average increase in Nu for entire range of Re compared to the conical cavity in upright position.

Suggested Citation

  • Awasthi, Kuldeep & Khan, Mohd Kaleem, 2019. "Performance evaluation of coiled tube receiver cavity for a concentrating collector," Renewable Energy, Elsevier, vol. 138(C), pages 666-674.
    • Handle: RePEc:eee:renene:v:138:y:2019:i:c:p:666-674
    DOI: 10.1016/j.renene.2019.02.015
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    References listed on IDEAS

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    1. Sahoo, Sudhansu S. & Varghese, Shinu M. & Suresh Kumar, C. & Viswanathan, S.P. & Singh, Suneet & Banerjee, Rangan, 2013. "Experimental investigation and computational validation of heat losses from the cavity receiver used in linear Fresnel reflector solar thermal system," Renewable Energy, Elsevier, vol. 55(C), pages 18-23.
    2. Suman, Siddharth & Khan, Mohd. Kaleem & Pathak, Manabendra, 2015. "Performance enhancement of solar collectors—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 192-210.
    3. Karimi, Reza & Gheinani, Touraj Tavakoli & Madadi Avargani, Vahid, 2018. "A detailed mathematical model for thermal performance analysis of a cylindrical cavity receiver in a solar parabolic dish collector system," Renewable Energy, Elsevier, vol. 125(C), pages 768-782.
    4. Facão, Jorge & Oliveira, Armando C., 2011. "Numerical simulation of a trapezoidal cavity receiver for a linear Fresnel solar collector concentrator," Renewable Energy, Elsevier, vol. 36(1), pages 90-96.
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    Cited by:

    1. Tuncer, Azim Doğuş & Khanlari, Ataollah, 2023. "Improving the performance of a triple-flow solar air collector using recyclable aluminum cans as extended heat transfer surfaces: An energetic, exergetic, economic and environmental survey," Energy, Elsevier, vol. 282(C).
    2. Alexandros Vouros & Emmanouil Mathioulakis & Elias Papanicolaou & Vassilis Belessiotis, 2023. "Computational Modeling of a Small-Scale, Solar Concentrating Device Based on a Fresnel-Lens Collector and a Flat Plate Receiver with Cylindrical Channels," Energies, MDPI, vol. 16(2), pages 1-21, January.

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