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Plate Type Heat Exchanger Construction
heat exchanger Plate Type Heat Exchanger Construction
Plate heat exchangers are now common and very small brazed versions are used in the hot-water sections of millions of combination boilers. The high heat transfer efficiency for such a small physical size has increased the domestic hot water (DHW) flowrate of combination boilers. The small plate heat exchanger has made a great impact in domestic heating and hot-water. Larger commercial versions use gaskets between the platessmaller version tend to be brazed.

The concept behind a heat exchanger is the use of pipes or other containment vessels to heat or cool one fluid by transferring heat between it and another fluid. In most casesthe exchanger consists of a coiled pipe containing one fluid that passes through a chamber containing another fluid. The walls of the pipe are usually made of metalor another substance with a high thermal conductivityto facilitate the interchangewhereas the outer casing of the larger chamber is made of a plastic or coated with thermal insulationto discourage heat from escaping from the exchanger.
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