Encyclopedia > Heat exchanger

  Article Content

Heat exchanger

A heat exchanger is a device for moving heat from one fluid to another. They typically consist of a series of tubes in which one of the fluids runs, which is "finned" in order to increase its surface area. The second fluid runs over the finned tubes to be heated or cooled.

Heat exchangers are quite common, although the name isn't widely used. Examples include the radiator in a car, in which the hot ethylene glycol exchanges heat with the air to cool the engine. Other examples include the hat water radiator found in many homes for heating, and the freon based heat exchangers found in a refrigerator or air conditioner.

Heat exchangers occur naturally in the circulation system of whales. Arteries to the skin carrying warm blood are intertwined with veins from the skin carrying cold blood causing the warm aterial blood to exchange heat with the cold venous blood. This reduces overall heat loss by the whale when diving in cold waters.

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Anna Karenina

... in the periodical Ruskii Vestnik ("Russian Messenger"), but Tolstoy clashed with the editor, Mikhail Katkov, over issues that arose in the final installment. Consequently, ...

This page was created in 169.1 ms