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 of 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.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
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 of 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.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
