1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Need help with transfer of heat/radiation/emissivity problem

  1. Jan 26, 2005 #1
    The concrete wall of a building is 0.18 m thick. The temperature inside the building is 22.8°C, while the temperature outside is 0.0°C. Heat is conducted through the wall. When the building is unheated, the inside temperature falls to 0.0°C, and heat conduction ceases. However, the wall does emit radiant energy when its temperature is 0.0°C. The radiant energy emitted per second per square meter is the same as the heat lost per second per square meter due to conduction. What is the emissivity of the wall?

    This is the problem I have to solve. I was thinking that I might need to use a combination of equations to solve this such as: H=kA(delta)T/L or Q=e(stefan-bolzmann constant)At(T^4).

    But I don't even know where to start. Please help me!!!

    thank you :smile:
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted

Similar Discussions: Need help with transfer of heat/radiation/emissivity problem
  1. Heat Transfer in oven (Replies: 0)

  2. Grrrrrrr heat problems (Replies: 0)