Heat Exchanger

Heat Exchanger

Heat exchanger is equipment widely used both upstream and downstream facilities, built for efficient heat transfer from one medium to another. Heat exchangers are classified by flow arrangement, parallel flow and counterflow. Parallel flow (cocurrent) is flow when two fluids enter the exchanger at the same end and travel parallel to one another to the other side. Counterflow (countercurrent) is when two fluids enter the exchanger from opposite ends.

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  • Coolers:
  • Air-cooled
  • Cooling towers
  • Commonly used types:
  • Shell and tube
  • Plate
  • Plate fin
  • Air cooled
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In oil and gas facilities, following types are commonly used:

  • Commonly used:
  • Bath heaters
  • Indirect
  • Fluid-fluid:
  • Shell and tube
  • Double pipe
  • Plate and frame

Uses of heat exchangers may vary depending on the process requirements, such as heat and cool fluids, heat recovery, separation, reboiling, condensing.

Shell And Tube Heat Exchanger

Shell and tube heat exchanger consist of a bundle of tubes and shell. Heat transfer occurs when one fluid that needs to be heated or cooled flows through the tubes and the second fluids runs over the tubes that provides the heat or absorbs the heat required.

Configuration

Configuration depends on each process requirements. Main consideration for the design should be fluid involved, corrosion potential, problems of cleaning, pressure drop, heat transfer efficiency, tubes usually 20 ft. and 20ft.

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Basic types of shell and tube heat exchangers are Fixed Tube Sheet, Floating Head,U-Tube.

Floating Head

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U - tube Heat Exchanger

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Fixed tube

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