Furnace Heat Exchangers

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Review of Furnace Heat Exchangers


Heat exchangers are devices that transfer heat from one fluid (liquid or gas) to another while keeping them separate. A hot fluid flows on one side of a heat exchanger's metal partition, transferring its heat to a lower temperature fluid flowing on the other side. The size of a heat exchanger's surface area affects it speed and efficiency: a large surface area transfers heat faster and more efficiently.

Many machines and household appliances contain heat exchangers. A car radiator is a heat exchanger: it transfers heat from the engine cooling system to the outside air, preventing the engine from overheating. Refrigerators and air conditioners have heat exchangers to dissipate heat; furnace heat exchangers heat the cool air that enters the furnace. Solar systems also use heat exchangers to transfer solar energy absorbed in solar collectors to the liquid or air that is used to heat the water or space.

Heat exchangers can be stainless steel heat exchangers or plate and frame heat exchangers or tube and shell heat exchangers made of steel, copper, bronze, stainless steel, aluminum, or cast iron. Solar heating systems usually use copper, because it is a good thermal conductor and has greater resistance to corrosion.




Furnace Heat Exchangers