An electronic package with a surface area of 1 m² placed in an orbiting space station is exposedto space. The electronics in this package dissipate all 1 kW of its power to the space through itsexposed surface. The exposed surface has an emissivity of 1.0 and an absorptivity 0.25.Determine the steady state exposed surface temperature of the electronic package (a) if thesurface is exposed to a solar flux of 750 W/m², and (b) if the surface is not exposed to the sun.

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Engineering

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surface is exposed to a solar flux of 750 W/m², and (b) if the surface is not exposed to the sun.

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter9: Electricity From Solar Energy

Section: Chapter Questions

Problem 9P

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Temperature as a Fundamental Dimension

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Question

An electronic package with a surface area of 1 m² placed in an orbiting space station is exposed
to space. The electronics in this package dissipate all 1 kW of its power to the space through its
exposed surface. The exposed surface has an emissivity of 1.0 and an absorptivity 0.25.
Determine the steady state exposed surface temperature of the electronic package (a) if the
surface is exposed to a solar flux of 750 W/m², and (b) if the surface is not exposed to the sun.

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