5241Views9Replies

Author Options:

which absorbs heat better,gloss black or flat black? Answered

heat absorbtion-gloss black or flat black-which is better?

Tags:solar

Discussions

0
None
knex dude 2000

5 years ago

It is scientifically proven that matte black is the most heat conductive.

0
None
seandogue

8 years ago

What really absorbs "best" is whatever color most efficiently converts the wavelength into mechanical motion at the molecular and atomic level.

for broad spectrum absorption, flat black in general, although paint chemistry, coating thickness, and the makeup of the underlying substrate all affect wavelength absorption (and retention).


0
None
iPodGuy

8 years ago

Flat black.  The glossier the finish, the more it reflects.

0
None
orksecurity

8 years ago

Remember, however, that flat black also _radiates_ heat most efficiently. The outsides of cooking pots are traditionally polished because that reduces heat loss, and yields a net gain in efficiency even though it gives up some absorption.

Lemonie's pointer to "black bodies" is a good one; that will get you closer to the Whole Truth.

(Many years ago, a professor very kindly and patiently explained this symmetry to me, after I thought I'd discovered a way to make heating systems more efficient. I should have realized that if it was that simple someone would have beaten me to it, but... Oh well, it was a fun design exercise while it lasted.)

0
None
lemonie

8 years ago

Matt black (flat), but it is wavelength dependent. If you want to choose paint for a heat-absorbing device go for matt/flat.
If you're really interested: black bodies

L

0
None
andreblue

8 years ago

flat cause it has less of a mirror effect as to a gloss which is made to reflect light to make it look better.

0
None
Kiteman

8 years ago

Matt black.

0
None
professor2005

8 years ago

Without a doubt, Flat Black.
The less reflective surface will absorb more heat,

0
None
steveastrouk

8 years ago

Flat. Though appearances can be deceiving.

Steve