U-Tube Heat Exchanger is a type of shell-and-tube heat exchanger in which the tubes inside the shell are shaped like the letter “U.” One fluid flows through these U-shaped tubes, while another fluid flows around the outside of the tubes within the shell. This configuration allows efficient heat transfer between the two fluids — without mixing. https://www.unitedheatexchangers.com/heat-exchanger/U-Tube-Heat-Exchanger/