Different types of heat transfer equipment is widely used in the process industry to heat up or cool down process fluids. Out of all different types shell and tube heat exchangers are quite popular and widely used for a variety of applications. Let's look at a typical shell & tube heat exchanger diagram to understand its structure. Shell & tube heat exchangers
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The three (3) letters TEMA designation is the standard method for identifying the type of channels and the type of shell of shell-and-tube heat exchangers. The first letter of the TEMA designation represents the front channel type (where the tube side fluid enters the heat exchanger) the second letter represents the shell type and the last ...
The most common type of heat exchanger is the shell and tube. These exchangers are constructed from elongated steel cylindrical vessels that contain bundles of parallel tubes. Liquid passes through the inside of the shell cover over the exterior side of the tubes and with another liquid passing through the
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The liquid level of a K shell design should just cover the tube bundle which fills the smaller diameter end of the shell. This liquid level is controlled by the liquid flowing over a wier at the far end of the entrance nozzle. The expanded shell area serves to facilitate vapor disengagement for boiling liquid in the bottom of the shell.
Removable front end cover "A" One pass shell "E" Fixed tubesheet rear end cover "L" (like "A") A E and L are explained in the table from TEMA standards above. Selecting a heat exchanger type. The structure of a shell and tube exchanger is decided based on a
Shell Cover 28 Transverse Baffles or Support Plates 10 Shell FlangeStationary Head End 29 Impingement Baffle or Plate 11 Shell FlangeRear Head End 30 Longitudinal Baffle 12 Shell Nozzle 31 Pass Partition 13 Shell Cover Flange 32 Vent Connection 14 Expansion Joint 33 Drain Connection 15 Floating Tubesheet 34 Instrument Connection 16
NEN- Tubesheets are welded to both the Shell and Bonnets. Access to the tubes is through covers on the channels. These units are favored in very high pressure designs as their construction minimizes the tubesheet thickness and number of high pressure retaining flanges. AEM/BEM/AEL-Shell side is completely welded up however the Bonnets are removable. Chemical mechanical and water blast