Effective reflectivity of “transparent-cover-radiation-absorbing heat-exchange-panel” system of flat solar collectors
N. R. AvezovaPhysico-Technical Institute, NPO Fizika-Solntse, Academy of Sciences of the Republic of Uzbekistan, Tashkent, UzbekistanR. R. AvezovPhysico-Technical Institute, NPO Fizika-Solntse, Academy of Sciences of the Republic of Uzbekistan, Tashkent, UzbekistanK. A. SamievPhysico-Technical Institute, NPO Fizika-Solntse, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
ABI
Abstract
An analytic expression is proposed to calculate the effective reflectivity of the “transparent-cover-radiation-absorbing heat-exchange-panel” system of flat solar collectors, considering the reflectivity of the radiation-absorbing surface of the heat-exchange panel. A practical example is presented of the calculation of the effective reflectivity of this system with single-layer transparent cover as a function of the integral coefficient of total solar radiation reflection by the radiation-absorbing surface of the heat-exchange panel.
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