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A fresnel strip reflector-concentrator for tubular solar-energy collectors

Author

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  • Choudhury, C.
  • Sehgal, H.K.

Abstract

A linear Fresnel reflector-concentrator employing commercial flat, front-reflecting mirror strips (of reflectivity [varrho] = 0·6), arranged in a planar configuration, has been fabricated and analyzed. An average concentration ratio of about 18 has been obtained for two-thirds of the periphery of a tubular receiver of 0·025 m diameter. Working in conjunction with a partially evacuated (10-2 Torr) cylindrical collector employing a selective cobalt oxide coating (with [alpha] = 0·88, [epsilon]250°C = 0·25 and stable up to 600°C), a stagnation temperature of ~ 385°C has been obtained, corresponding to a direct solar flux of ~ 600 W/m2.

Suggested Citation

  • Choudhury, C. & Sehgal, H.K., 1986. "A fresnel strip reflector-concentrator for tubular solar-energy collectors," Applied Energy, Elsevier, vol. 23(2), pages 143-154.
    • Handle: RePEc:eee:appene:v:23:y:1986:i:2:p:143-154
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    Cited by:

    1. Roostaee, Amin & Ameri, Mehran, 2019. "Effect of Linear Fresnel Concentrators field key parameters on reflectors configuration, Trapezoidal Cavity Receiver dimension, and heat loss," Renewable Energy, Elsevier, vol. 134(C), pages 1447-1464.
    2. Abbas, R. & Muñoz, J. & Martínez-Val, J.M., 2012. "Steady-state thermal analysis of an innovative receiver for linear Fresnel reflectors," Applied Energy, Elsevier, vol. 92(C), pages 503-515.
    3. Singh, Panna Lal & Sarviya, R.M. & Bhagoria, J.L., 2010. "Thermal performance of linear Fresnel reflecting solar concentrator with trapezoidal cavity absorbers," Applied Energy, Elsevier, vol. 87(2), pages 541-550, February.
    4. Reddy, K.S. & Balaji, Shanmugapriya & Sundararajan, T., 2018. "Estimation of heat losses due to wind effects from linear parabolic secondary reflector –receiver of solar LFR module," Energy, Elsevier, vol. 150(C), pages 410-433.
    5. Abbas, R. & Martínez-Val, J.M., 2015. "Analytic optical design of linear Fresnel collectors with variable widths and shifts of mirrors," Renewable Energy, Elsevier, vol. 75(C), pages 81-92.
    6. Vouros, Alexandros & Mathioulakis, Emmanouil & Papanicolaou, Elias & Belessiotis, Vassilis, 2020. "Performance evaluation of a linear Fresnel collector with catoptric subsets," Renewable Energy, Elsevier, vol. 156(C), pages 68-83.
    7. Flores Larsen, S. & Altamirano, M. & Hernández, A., 2012. "Heat loss of a trapezoidal cavity absorber for a linear Fresnel reflecting solar concentrator," Renewable Energy, Elsevier, vol. 39(1), pages 198-206.
    8. Sait, Hani H. & Martinez-Val, Jose M. & Abbas, Ruben & Munoz-Anton, Javier, 2015. "Fresnel-based modular solar fields for performance/cost optimization in solar thermal power plants: A comparison with parabolic trough collectors," Applied Energy, Elsevier, vol. 141(C), pages 175-189.

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