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Car radiators have fins to allow the flow of air to enter, but as well as having a bit of protection. If it didn't, you would have a car with a hole in the front.

Also, they are black to absorb and radiate heat. Black bodies radiate heat better so that is why they are black. The thin fins improve the overall surface area so that heat is dissipitated to the ambient efficiently. Hope this helps.

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Q: Why car radiator is design with thin fins and black in colour?
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What colour are the cooling fins of a refrigerator?

Cooling fins on a refrigerator are typically thin, metallic and silver or gray in color.


Does water flow through the fins in a car radiator?

No, water does not flow through the fins in a car radiator. The fins are there to dissipate heat from the coolant circulating through the radiator tubes. Air passing over the fins helps cool down the hot coolant flowing through the tubes.


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Because the more coolant passed through the fins, the more energy can be emitted.


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To speed up the transfer of heat energy.


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On cars that have them they are air cooled since there is no radiator.


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First of all use an airline blowing from the rear through to the front of the radiator,then using a brush ie paintbrush ,on the front fins to gently clear any loosend debris but not forcing them further into the radiator. Repeat as nessesary ,you may have to use some degreaser or mild diluted washing up liquid to clear dried on residue. But be careful to not damage the fins of the radiator as they are more delicate than you realise.


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What is the purpose of the radiator in your car?

Exchanges heat from the coolant to the air which flows through the fins.


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As coolant cycles through the engine, it absorbs heat from the engine, after which, it continues through the cooling system back to the radiator. As the coolant passes through the radiator, the heat is exchanged to the ambient air by way of airflow through the radiator fins (this is why it's important not to bend the radiator fins).


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