What Is Plain Tube Heat Exchanger?

A plain tube heat exchanger is a device that transfers heat between fluids using smooth tubes without fins or other extended surfaces. They are often used for heating, cooling, or condensing.

How they work

Heat is transferred between fluids through the outer surface of the smooth tubes

The tubes are often arranged in bundles, where the flow converges in the spaces between the tubes

The heat transfer efficiency of plain tubes may be lower than finned tubes, which have extended surfaces called fins

Where they are used

Air conditioning: Plain tube heat exchangers are used in air conditioners to cool and heat air

Gas heaters: Plain tube heat exchangers are used to heat gases

Oil and gas: Plain tube heat exchangers are used in oil and gas refineries

Chemical processing: Plain tube heat exchangers are used in chemical processing plants

Materials

Plain tube heat exchangers can be made from a variety of materials, including carbon steel, stainless steel, titanium, copper, and nickel