25 November 1992 Optical and time constant performance evaluation of a linear Fresnel reflecting solar concentrator
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Abstract
A Fresnel reflecting solar concentrator fabricated from mirror strips of equal width and almost equi-spaced from one another could possibly lead to an easy design. The axes of rotation of mirror strips are parallel and lying in the same plane. The reflectivity of the mirror strips was about 0.7. Optical and time constant performance of this concentrator-receiver assembly employing mirror strips of 50 mm widths and at a 1 m focal distance in conjunction with a reverse flat plate absorber with black-board paint (non-selective coating) was studied. Employing provisions for suppressing heat loss and reducing absorber area, a time constant of 9 minutes and an overall efficiency of 46% was achieved.
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M. Khairul Al Khan, M. Khairul Al Khan, Abdul Jalil Khan, Abdul Jalil Khan, } "Optical and time constant performance evaluation of a linear Fresnel reflecting solar concentrator", Proc. SPIE 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows, (25 November 1992); doi: 10.1117/12.130526; https://doi.org/10.1117/12.130526
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