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help help !semi-transparent exterior walls

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Old   April 1, 2013, 23:21
Default help help !semi-transparent exterior walls
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stefandcl
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hi, everyone !i just want to simulate the case like greenhouse effect:radiation get into room from the top semi-transparent wall ,how do i define the boundary condition for this semi-transparent wall when the energy contains external black body radiation and solar radiation。i know in“ thermal” column is set to radiation and input the temperature and external emissivity,in DO MODEL set the solar radiation but how to define the value in the “radiation” column ,especially value for irradiation,is it the sum of solar and external black body radiation?if so,i need to calculate the value for black body radiation first?
The essential of the question is :the value of irradiation in radiation column for semi-transparent wall is the sum of solar radiation and black body radiation or just the one of them,if one,which one?
forget my english! thank you !!best wishes!!!
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Old   April 2, 2013, 05:32
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Hello,

I hope that someone can answer you because I have the same problem... It's not greenhouse effect but just natural convection with air... So I don't know how to specialize the semi-transparent wall (which could be like air)...
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Old   April 3, 2013, 03:52
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upupupupupupupupupupupup!
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