Coiled tube heat exchanger

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A shell-and-tube heat exchanger is a type of tubular heat exchanger; it consists of concentric tubes of different sizes connected together, with the outer tube section being referred to as the shell side and the inner tube section as the tube side. Two different media can flow in opposite directions (or in the same direction) within the shell side and the tube side to achieve heat exchange. A shell-and-tube heat exchanger usually consists of a shell (including an inner shell and an outer shell), U-shaped elbow tubes, a packing box, etc. The advantages of shell-and-tube heat exchangers are: ◆ Simple structure, capable of withstanding high pressures ； ◆ The heat transfer area can be increased or decreased as needed, making it convenient to use. The disadvantages of shell-and-tube heat exchangers are: ◆ Many tube joints, prone to leakage ； ◆ It occupies a large area, resulting in high metal consumption per unit of heat transfer surface.