RENEWABLE & SUSTAINABLE ENERGY REVIEWS, cilt.13, ss.67-84, 2009
The aims of this study are to optimize the coupling of a low-cost offset paraboloidal dish, which concentrates direct solar irradiance with dual axes tracking component, and the fibre optic bundle (FOB), which transmits concentrated solar energy; to review previous studies on the transmission of concentrated solar energy via optical fibres (TCSEvOF) by classifying according to their purposes; to present a mathematical model for coupling symmetrical paraboloidal dish and FOB, and a modified model for optimum coupling of offset paraboloidal dish proposed in our study, taking into account the parameters of the dish and dispersion effect; to apply the models to symmetrical and offset paraboloidal dish under the same conditions; and to compare the annual output power obtained. Optical efficiency of the whole system was calculated as 68% in optimum condition, but it was found to be 63% for the system proposed. Overall system efficiency was found to be 59%. It was found that offset paraboloidal dish produced much more energy than the symmetrical one does when comparing under the same conditions. The difference of monthly average annual obtainable power was calculated as 0.82%. The monthly average annual power gained from the offset paraboloidal dish proposed was computed as 1041.6 kW to per square metre. (C) 2007 Elsevier Ltd. All rights reserved.