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SVTPerformance's Chain of Restaurants
The Greasy Spoon
Radiator/ Intercooler Black Paint mythbusted
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<blockquote data-quote="busdriver" data-source="post: 14316972" data-attributes="member: 127741"><p>Not crazy shocking. When the car is moving, there is a large amount of air passing through the radiator/inter-cooler (really a heat exchanger) so the dominate method of getting heat out of the coolant and into the passing air is convective. When sitting still there is no air flow so the primary method of getting heat out of the coolant is through radiation. Radiation is dependent on the emissivity of the surface responsible for radiating heat. Black has the highest emissivity, the worst color for a radiator would be a polished surface. Emissivity is a two way street however, that's why black interiors get really hot in the summer. Radiation doesn't work as well as convection, that's why there are fans on radiators. Funny enough this concept is also why the SR-71 was painted black, to get rid of airframe heat at high altitude. Cool video non-the less, it's fun seeing science in action.</p></blockquote><p></p>
[QUOTE="busdriver, post: 14316972, member: 127741"] Not crazy shocking. When the car is moving, there is a large amount of air passing through the radiator/inter-cooler (really a heat exchanger) so the dominate method of getting heat out of the coolant and into the passing air is convective. When sitting still there is no air flow so the primary method of getting heat out of the coolant is through radiation. Radiation is dependent on the emissivity of the surface responsible for radiating heat. Black has the highest emissivity, the worst color for a radiator would be a polished surface. Emissivity is a two way street however, that's why black interiors get really hot in the summer. Radiation doesn't work as well as convection, that's why there are fans on radiators. Funny enough this concept is also why the SR-71 was painted black, to get rid of airframe heat at high altitude. Cool video non-the less, it's fun seeing science in action. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Greasy Spoon
Radiator/ Intercooler Black Paint mythbusted
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