Radiation material properties- absortancy
Radiation material properties- absortancy
(OP)
Hi all,
I am performing some calcualtions to consider solar radiation in temperature for an structure, and I would need the values for absortancy for that.
For (landa) aprox. 0.5 micrometers (solar radiation) and (landa) aprox 10 micrometers (low temperature)
The structure will be plain carbon steel, but painting with a polyurethane, 75 microns. The final colour is RAL 7010, that is a kind of grey. In order to evaluate several possibilities, I would need the data considering light grey and dark grey.
I have found some other data, but not for the finishing/colour I need.
I know there is a book called "thermal radiation properties survey" Gubareff, G.G.; J.E. Janssen and E.H.Torbog, and maybe is there...can anybody give me these values?
Thanks in advance
I am performing some calcualtions to consider solar radiation in temperature for an structure, and I would need the values for absortancy for that.
For (landa) aprox. 0.5 micrometers (solar radiation) and (landa) aprox 10 micrometers (low temperature)
The structure will be plain carbon steel, but painting with a polyurethane, 75 microns. The final colour is RAL 7010, that is a kind of grey. In order to evaluate several possibilities, I would need the data considering light grey and dark grey.
I have found some other data, but not for the finishing/colour I need.
I know there is a book called "thermal radiation properties survey" Gubareff, G.G.; J.E. Janssen and E.H.Torbog, and maybe is there...can anybody give me these values?
Thanks in advance





RE: Radiation material properties- absortancy
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RE: Radiation material properties- absortancy
RE: Radiation material properties- absortancy
Here is a hint for gray paint -- it usually has the same absorptance for all wavelengths, solar and infrared. But if want to be sure, you need wavelength-dependent data from the manufacturer or a test lab. Materials differ from one vendor to another, and the final texture can make a difference.