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Old Feb 9th 2017, 04:27 PM   #1
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Temperature Increase due the radiation absorption

Hello Everyone,

I am trying to understand how to calculate the temperature increase due to the absorption of radiant energy by an object that can be approximated by a blackbody (emissivity and absorptivity close to 1). As radiant energy is being absorbed, the body temperature increases until thermal steady state is reached. How quickly will the object reach steady state? What does that depend on?

Do I need to know the heat capacity of the object?

Let's assume that the object is our human body. The skin heat capacity is about 4000. We seat in front of a lamp whose intensity I (W/m^2) is known. How hot will the skin become?

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