Sunlight enters a skylight with dimensions 1.84 m by 2.91 m. Theintensity of sun

Question

Sunlight enters a skylight with dimensions 1.84 m by 2.91 m. Theintensity of sunlight is 1235W/m2. (a) Find the total solar energy incident on theskylight during a 1-hour interval if the sun's rays areperpendicular to the surface of the skylight.
J

(b) Find the total solar energy incident on the skylight during a1-hour interval if the sun's rays are at an angle of 27.6° with the normal to the surface.
J (a) Find the total solar energy incident on theskylight during a 1-hour interval if the sun's rays areperpendicular to the surface of the skylight.
J

(b) Find the total solar energy incident on the skylight during a1-hour interval if the sun's rays are at an angle of 27.6° with the normal to the surface.
J

Explanation / Answer

Intensity I = 1235 W / m^ 2

Area   A = 1.84 m * 2.91 m = 5.3544 m ^ 2

Power P = IA = 6612.684 W

i.e., energy per second E = 6612.684 J

(a). time t = 1 hr = 3600 s

Total solar energy incident E ‘ = 3600 * E = 23.8 *10 ^ 6 J

(b).  the total solar energy incident on the skylightduring a 1-hour interval if the sun's rays are at an angle of27.6° with the normal to the surface E" = E ' cos 27.6 = 21.09 * 10 ^ 6 J

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