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Effects of shading and blocking in compact linear fresnel reflector field

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  • Sharma, Vashi
  • Khanna, Sourav
  • Nayak, Jayanta K.
  • Kedare, Shireesh B.

Abstract

In a compact linear fresnel reflector field, ‘s’ number of reflector-rows lying between two receivers can be configured in 2s ways. Each possible configuration will lead to different energy loss, electricity generation and cost of electricity. The variations in energy losses, energy collection by fluid, electricity generation and cost of electricity with length (L) and width (w) of aperture of a reflector-row, spacing between adjacent reflector-rows (p), number of reflector-rows (2n), receiver-height (H), collector-configuration and location have been studied. It is found that the collector configuration has no significant effect on annual shading. However, it affects annual energy losses due to cosine effect, blocking and the factors τ and α significantly. As a result, the cost of electricity can be improved significantly by varying collector configuration. The cost of electricity decreases with increment in p/w and later on, it starts increasing. The best p/w ratio corresponding to minimum cost of electricity is 1.44 for H/nw = 0.3 and 1.85 for H/nw = 0.7. The energy collection by fluid increases rapidly with increment in H/nw initially. However, beyond H/nw about 0.7, further increase in H/nw does not lead to significant increase in energy collection.

Suggested Citation

  • Sharma, Vashi & Khanna, Sourav & Nayak, Jayanta K. & Kedare, Shireesh B., 2016. "Effects of shading and blocking in compact linear fresnel reflector field," Energy, Elsevier, vol. 94(C), pages 633-653.
    • Handle: RePEc:eee:energy:v:94:y:2016:i:c:p:633-653
    DOI: 10.1016/j.energy.2015.10.098
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    References listed on IDEAS

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    1. Grena, Roberto & Tarquini, Pietro, 2011. "Solar linear Fresnel collector using molten nitrates as heat transfer fluid," Energy, Elsevier, vol. 36(2), pages 1048-1056.
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    2. Khanna, Sourav & Newar, Sanjeev & Sharma, Vashi & Panigrahi, Pradipta Kumar & Mallick, Tapas K., 2018. "Deformation of receiver in solar parabolic trough collector due to non uniform temperature and solar flux distribution and use of bimetallic absorber tube with multiple supports," Energy, Elsevier, vol. 165(PA), pages 1078-1088.
    3. Idris Al Siyabi & Sourav Khanna & Senthilarasu Sundaram & Tapas Mallick, 2018. "Experimental and Numerical Thermal Analysis of Multi-Layered Microchannel Heat Sink for Concentrating Photovoltaic Application," Energies, MDPI, vol. 12(1), pages 1-25, December.
    4. Chan, A.L.S., 2019. "Effect of adjacent shading on the energy and environmental performance of photovoltaic glazing system in building application," Energy, Elsevier, vol. 187(C).
    5. Abbas, R. & Sebastián, A. & Montes, M.J. & Valdés, M., 2018. "Optical features of linear Fresnel collectors with different secondary reflector technologies," Applied Energy, Elsevier, vol. 232(C), pages 386-397.
    6. Liang, Kai & Xue, Kaili & Zhang, Heng & Chen, Haiping & Ni, Jianxiong, 2020. "Design and performance analysis of an annular fresnel solar concentrator," Energy, Elsevier, vol. 210(C).
    7. Boccalatte, Alessia & Fossa, Marco & Ménézo, Christophe, 2022. "Calculation of the incidence angle modifier of a Linear Fresnel Collector: The proposed declination and zenith angle model compared to the biaxial factored approach," Renewable Energy, Elsevier, vol. 185(C), pages 123-138.
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    9. Beltagy, Hani, 2021. "The effect of glass on the receiver and the use of two absorber tubes on optical performance of linear fresnel solar concentrators," Energy, Elsevier, vol. 224(C).

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