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A photovoltaic panel of dimension 2 m X 4 m is installed on the roof of a home

Mechanical Engineering

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A photovoltaic panel of dimension 2 m X 4 m is installed on the roof of a home. The panel is irradiated with a solar flux of Gs = 700 W/m2, oriented normal to the top panel surface. The absorptivity of the panel to the solar irradiation is as = 0.83, and the efficiency of conversion of the absorbed flux to electrical power is eta = P/ GsA = 0.553 - 0.001K-1 Tp, where Tp, is the panel temperature expressed in kelvins and A is the solar panel area. Determine the electrical power generated for (a) a still summer day, in which = Tmax = 35 degreeC, h = 10 W/m2 o K, and (b) a breezy winter day, for which Tout, = Tp = - 15 degree C, h = 30 W/m2-K. The panel emissivity is epsilon = 0.90.