U Tube bundle Heat Exchangers
A heat-exchanger system consisting of a bundle of U tubes (hairpin tubes) surrounded by a shell (outer vessel); one fluid flows through the tubes, and the other fluid flows through the shell, around the tubes. Multi therm can duplicate any existing bundle to include dimensions, materials and performance. we can build "U" tube bundles, straight tube "floating" tube bundles, or we can retube fixed tube sheet heat exchangers when the bundles is not removable. multi therm is not locked into any one material. Most bundles tend to be build with copper tubes and steel tube sheets.
There can be many variations on the shell and tube design. Typically, the ends of each tube are connected to plenums (sometimes called water boxes) through holes in tube sheets. The tubes may be straight or bent in the shape of a U, called U-tubes. In nuclear power plants called pressurized water reactors, large heat exchangers called steam generators are two-phase, shell-and-tube heat exchangers which typically have U-tubes.
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