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year 27, Issue 2 (ICOP & ICPET 2021 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 27(2): 104-107 |
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Foulaadvand M E, Karimi P, Saeedi A, Sharifi Abdar S. Concentration ratio and flux profile in spheric & parabolic mirrors. ICOP & ICPET _ INPC _ ICOFS 2021; 27 (2) :104-107
URL: http://opsi.ir/article-1-2317-en.html
URL: http://opsi.ir/article-1-2317-en.html
1- Department of Physics, University of Zanjan, Zanjan, Iran
2- Department of Physics, South Tehran Branch, Islamic Azad University, Tehran, Iran
2- Department of Physics, South Tehran Branch, Islamic Azad University, Tehran, Iran
Abstract: (944 Views)
We have analytically obtained the flux concentration ratio in the focal area of a paraboloidal and a spherical mirror which are widely used in solar thermal applications. It is shown that in an ideal paraboloidal concentrator the reflected solar rays are focused in a point whereas in a spherical concentrator the reflected ray intersects the mirror axis on a point which depends on the lateral distance of the incident ray to the axis. However, those rays which are close to the axis will be concentrated to a quasi focal point. The average radiative flux on a receiver area is obtained.
Keywords: solar thermal energy, paraboloidal dish, spherical dish, concentration ratio, thermal flux profile
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