What Are Finned Tubes

Finned tubes are elongated flat tubes that are made of aluminum cladded carbon steel and are provided with brazed aluminum fins. These tubes are used in a series in heat exchangers. The advantage they offer over ordinary tubes is that the fins offer greater contact with the liquid outside. This quickens the exchange of heat between the liquid inside the tube and the one outside it. With a normal tube, the rate of exchange of heat would be much slower.Finned tubes are particularly useful in the case of air heat exchangers. In an air heat exchanger, the heat transfer is to take place between a liquid and gas. With the heat coefficient of the airside being lower, a finned tube can be exceptionally helpful. A finned tube increases the surface area and thus helps in faster heat transfer between the components.Fin tube heat exchangers are used in household appliances and industrial heat exchangers. Fin tube heat exchangers are used in air conditioners and car radiators. The purpose of using a finned tube in an air conditioner is to cool the air passing through it. In a car radiator, it cools the liquid in the tube with the air passing through in crossflow.

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