Painting intercooler black - good or not?
#41
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,504
Total Cats: 4,079
Assuming:
h_air = 50 W/m*k
h_aluminum = 221 W/m*k
h_polyethylene = 0.50 W/m*k (closest thing to paint I can find...)
I found some formula and got a heat transfer coefficient of:
without paint: 40.774155458486 W/m*k
with paint: 40.774153752544 W/m*k
For a reduction in heat transfer of 0.0000042%. Not a whole lot. Not 100% sure I did it right though. I'm going over it.
h_air = 50 W/m*k
h_aluminum = 221 W/m*k
h_polyethylene = 0.50 W/m*k (closest thing to paint I can find...)
I found some formula and got a heat transfer coefficient of:
without paint: 40.774155458486 W/m*k
with paint: 40.774153752544 W/m*k
For a reduction in heat transfer of 0.0000042%. Not a whole lot. Not 100% sure I did it right though. I'm going over it.
Using the IC posted above, there are 14 rows of fins at 3" wide. Lets say that laid out straight they are 48" long, and .02" thick.
.02 x 48 x 14 (# of runners) = 13 sq in. of edge surface surface gets coated.
Maybe a little gets onto the flat edge of fins about a 1/4 of an inch : .25 x 48 x 14 (# of runners) x 2 (# of sides)= 336 sq in. of the fl
so we coat a total of 349 sq in. of cooling surface when painting the IC...out of 4045, or 8.5%.
If coating the whole thing is 0.0000042% less efficient, than I assume painting just the front is what? Only .000000357% less efficient than a non-painted IC?
#54
On topic, I'm painting mine, even if it lowered efficiency a whole whopping 1%. The older Begi intercoolers mount off-center, and are small to boot. It has no bling factor, and I don't want cops/ricers to know it's there. It's going to be black.
#55
Wow lot of mathematecians around....I have a Calc 3 test on tuesday that means the weekend wont be as fun for i have to study i dont want to take any classes over...and as for the painting goes I will definetly paint my Ic, when i get it, i think that will help to keep the lusting ppl away from my baby
#57
I like all my other classes though and am doing fine. I'm in thermo II right now and got an A on my last test. Woot!