p10.5-12

p10.5-12 - a.) Estimate the steady state temperature of the...

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10.5-12 A satellite orbits the earth at a height (above the surface of the earth) of H orbit = 3.5x10 5 m. The diameter of the earth is D earth = 1.29x10 7 m and the temperature of the earth is T earth = 300 K. The distance between the earth and the sun is approximately R = 1.497x10 11 m. The sun has diameter D sun = 1.39x10 9 m and the surface temperature of the sun is approximately T sun = 5780 K. The earth and the sun can be considered black. The satellite is spherical with diameter D sat = 1 m. The emissivity of the satellite surface is ε sat = 0.5. There is sat q ± = 100 W of power dissipation within the satellite that must be rejected from its surface through radiation.
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Unformatted text preview: a.) Estimate the steady state temperature of the satellite when it is on the day-side of the earth. b.) Estimate the steady state temperature of the satellite when it is on the night-side of the earth. c.) Plot the steady-state day-side and night-side temperature as a function of the satellite emissivity. Explain the shape of your plot. d.) Overlay on your plot from (c) the steady-state day-side and night-side temperature as a function of the satellite emissivity if the satellite power dissipation were sat q = 0 W. Explain the shape of your plot....
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