The aluminum alloy (2024-t6) absorber plate is 6 mm thick and well insulated on its bottom. the top surface of the plate is sepa
rated from a transparent cover plate by an evacuated space. the tubes are spaced a distance / of 0.20 m from each other, and water is circulated through the tubes to remove the collected energy. the water may be assumed to be at a uniform temperature of 7z 60c. under steady-state operating conditions for which the qhw radiation heat flux to the surface is trad 800 w/m2 , what is the maximum temperature on the plate and the heat transfer rate per unit length of tube? note that trad represents the net effect of solar radiation absorption by the absorber plate and radiation exchange between the absorber and cover plates. you may assume the temperature of the absorber plate directly above a tube to be equal to that of the water.
The aluminum alloy(2024-T6; k=180 W/m<span>!K,) </span>absorber plate<span> is </span>6 mm thick<span> and </span>well insulated<span> on </span>its bottom<span>. The </span>top surface<span> of the </span>plate<span> is </span>separated<span> from a </span>transparent cover plate<span> by an </span>evacuated space<span>. The </span>tubes<span> are</span>spaced<span> a </span>distance<span> L of ...</span>
A kilogram is a unit of weight. So a kilogram of bricks would weigh the same as a kilogram of feathers despite if its in water or air since weight is determined by gravity in relation to mass and not what substance the object is in.
Wind is primarily driven by differences in air pressure. These variations in air pressure are due to temperature differences caused by variations in solar energy received at the surface of the Earth.
