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Combustion inside of an engine creates extremely high temperatures- hot enough to melt cast iron. A cooling system caries this heat away from teh engine's cylinders, and radiates it into the air
Most automobiles use some sort of a liquid coolant, which circulates throughout the engine. A pump sends the cooling agent from the engine to a radiator which moves the heat from the coolant into the air. Earlier engines used water as the coolant, but today, we use antifreeze, which has a higher boiling point, and lower freezing point, which makes it more effective in extreme temperatures. Some engines may use air as a coolant, and are designed so air flows to the engine, and can reach metal fins that conduct the heat away from the cylinders.
Another smaller radiator is into all modern cars, and this one uses engine heat to warm the interior of the car and heats up the windshield defroster. |
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