Get the paint brushes out

Sparky68 · 06-18-2014, 05:19 PM

Jat · 06-18-2014, 06:32 PM

Just to be pedantic, surely painting it black is not the same as it being made of a black material throughout. So this test is a little flawed on that basis....?

AlwynMike · 06-19-2014, 03:02 AM

. . . I did a course on this last year!!

The heat (Infra Red Radiation) radiates from the surface of the material, so it does only need to be painted black - the thickness of the black material is immaterial (sorry!).

Another thing I learnt on the course (or that I still remember anyway) that some thing may seem counter-productive. . . You refurbish a small bathroom and replace the radiator with a nice shiny chrome towel rail. In the winter, the bathroom is cold, but the rail is getting hot. This is because chrome does not radiate as well as a painted surface. The remedy is to cover your towel rail with errr, towels, as they radiate better than the chrome!

Mike

Jat · 06-19-2014, 03:42 AM

Quote:

Originally Posted by AlwynMike

. . . I did a course on this last year!!

The heat (Infra Red Radiation) radiates from the surface of the material, so it does only need to be painted black - the thickness of the black material is immaterial (sorry!).

Another thing I learnt on the course (or that I still remember anyway) that some thing may seem counter-productive. . . You refurbish a small bathroom and replace the radiator with a nice shiny chrome towel rail. In the winter, the bathroom is cold, but the rail is getting hot. This is because chrome does not radiate as well as a painted surface. The remedy is to cover your towel rail with errr, towels, as they radiate better than the chrome!

Mike

Interesting to know. Would black towels be better than white ones?

If the intercooler was black internally, would that also help absorb heat from the air passing within it?

AlwynMike · 06-19-2014, 07:07 AM

Quote:

Originally Posted by Jat

Interesting to know. Would black towels be better than white ones?

If the intercooler was black internally, would that also help absorb heat from the air passing within it?

Hells Teeth, I wasn't THAT interested in the course - which was for infra red detection of gas leaks!!

Oddly, yes, black towels would be better than white

Internal colours? That's absorption, rather than radiation, so it may be that a shiny white would be better, but I'm just guessing now.

Mike

corasdad · 06-19-2014, 01:11 PM

those guys are fantastic look them up on youtube

06-18-2014, 05:19 PM	#1
Sparky68 Brigadier General 812 Rep 4,364 Posts Drives: 2016 M2 Alpine White Join Date: Oct 2012 Location: Cambs UK iTrader: (11) Garage List 2016 BMW M2 [0.50] 2017 BMW F30 330D [0.00] 2014 M135 [0.00] 2007 BMW 335i [0.00]	Get the paint brushes out __________________ OG M2 7sp DCT Masata FMIC Masata Boost Pipe Cobra Catless DP Powervalve Exhaust Devilsown Methanol Injection Turbosmart BOV BM3 Stage 3 Halim custom map Pure 500 Dorch 1.5 HPFP
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06-18-2014, 06:32 PM	#2
Jat Lieutenant 29 Rep 459 Posts Drives: E91 330i M Sport Join Date: May 2012 Location: Leicester iTrader: (0)	Just to be pedantic, surely painting it black is not the same as it being made of a black material throughout. So this test is a little flawed on that basis....? __________________ E91 330i M Sport : Coilovers : Simota Air Intake : BMW Performance Brakes : 335 Style Exhaust : BMW Performance Colour Coded Engine Bay : BMW Strut Brace : 19" 1M Style Rims My Journal Thread : CLICK HERE
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06-19-2014, 03:02 AM	#3
AlwynMike Lieutenant Colonel 372 Rep 1,716 Posts Drives: F36 440i GC. Join Date: Sep 2010 Location: Lincolnshire Flatlands iTrader: (1)	. . . I did a course on this last year!! The heat (Infra Red Radiation) radiates from the surface of the material, so it does only need to be painted black - the thickness of the black material is immaterial (sorry!). Another thing I learnt on the course (or that I still remember anyway) that some thing may seem counter-productive. . . You refurbish a small bathroom and replace the radiator with a nice shiny chrome towel rail. In the winter, the bathroom is cold, but the rail is getting hot. This is because chrome does not radiate as well as a painted surface. The remedy is to cover your towel rail with errr, towels, as they radiate better than the chrome! Mike
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06-19-2014, 01:11 PM	#6
corasdad Lieutenant 30 Rep 595 Posts Drives: m sport 320d Join Date: Apr 2013 Location: Lancashire iTrader: (0)	those guys are fantastic look them up on youtube __________________ 2006 320d Msport,sunshades, remapped , strut brace, air scoops, black grills,custom exhaust , performance filter, light up gear knob ,blue led interior lights,leather wrapped dash trims, csl spoiler more to come
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