Bare tube and fin tube are two different heat exchanger components, they have some differences in structure and function:

Structure: The bare tube is a simple metal tube without any external reinforcement; The finned tube is a special heat exchange tube whose outer surface is fixed with a series of thin sheets by machining or welding to increase the heat exchange area.

Function: The bare tube is mainly used for occasions with high heat transfer coefficient and low fluid resistance; The finned tube is suitable for occasions where the heat transfer coefficient is low and the heat transfer needs to be strengthened. Due to the addition of many flakes on the outer surface of the finned tube, strong turbulence is generated during the flow of the fluid, thus improving the heat transfer efficiency.

Material: The material of bare tube and finned tube can be selected according to actual needs, common carbon steel, stainless steel, copper, aluminum and so on.

Application: Bare tube is widely used in various industrial equipment heat exchanger, condenser, evaporator, etc. Finned tubes are often used in air heaters, air coolers, waste heat recovery equipment and other occasions that need to strengthen heat transfer.

In short, bare tube and finned tube have advantages and disadvantages, and need to be selected according to the specific application scenario and process requirements.