a square solar panel of 2 m x 2 m of crystalline silicon solar cells i
A square solar panel of 2 m X 2 m of crystalline silicon solar cells is placed on top ofa house roof in Coventry, UK. The following data is reported for some peak weather conditions: During a quiet Winter day in the West Midlands, UK (December 2019), the chilly air temperature was 277 K. One side of the vertically placed panel was receiving heat, affected by the Earth's space radiative temperature of 519 K (assuming a clear day); while the other side was insulated. On a typical clear and shiny Summer day (during July 2020) the local ambient temperature was 298 K and the average wind speed was 22.4 MPH parallel to the horizontally placed panel. The panel was receiving heat due to the solar irradiation temperature 530 K – within the orbit space on a clear day; while the bottom side of the panel was insulated. Assume 75% emissivity for crystalline silicon. and solar heat flux of 2800 W/m².Estimate the following data, during both (Winter and Summer) conditions: The receiving surface temperatures (to the nearest one decimal); - Thermal conductivity, kinematic viscosity, density and Prandtl number for air; The Rayleigh number; The Nusselt number; The convective heat transfer coefficient; . The rate of heat transfer from the panel.
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