Heat Exchanger Handbook
Kuppan is a noted authority in the area of heat exchangers, pressure vessels, and railway technologies. Spiral Plate Type Exchangers. Split backing ring and pull through floating head exchangers have a special support type baffle adjacent to the floating head to take the weight of the floating head assembly. Graphite Block Exchangers.
This kind of description is ideal for students and industry professionals. He has years of practical experience through his work with the Indian Railways, and is well-known in industry and academia in South Asia. In explosive expansion a charge is placed inside the tube within the tubesheet thickness.
How many copies would you like to buy? The weld neck flange type, which has a tapered hub with a smooth stress transition and accessibility for full nondestructive examination, provides the highest integrity of the three types. When removable bundles are used, this leakage gap is sealed by flexible strips or packing devices. Shell and Tube Exchangers.
Add to Wishlist Add to Wishlist. With increasing effort in recent years to reduce weight and size and increase efficiency, other types of exchangers are increasingly used. The most common method is roller expansion where the force produced by an expanding tool deforms the tube radially outward to give a mechanical seal. Introduction to Probability David F. Different methods are available for the attachment of the tube end to the tubesheet.
Plate Fin Type Exchangers. For exchangers with multiple tube passes, the channels are fitted with flat metal plates which divide the head into separate compartments.
Tubesheets less than mm thick are generally made from plate material. Clad plate is commonly used where high alloy material is required for process reasons. The most common tube length range is to mm for removable bundles and to mm for the fixed tube type. The following components perform a function mainly related to pressure and fluid containment.
The shell barrel must be straight and true as a tightly fitting tube bundle must be inserted and particular care has to be taken in fabrication. The shell and tube exchanger basically consists of a number of connected components, some of which are also used in the construction of other types of exchangers.
Tube thickness must be checked against internal and external pressure but the dimensions of the most commonly used tubes can withstand appreciable pressures. It also specifies tolerances for tube hole diameter, ligament width and for drill drift. If the tubesheet or cover is not welded to the channel, the tubesheet or cover is grooved and the edge of the partition plate sealed by a gasket embedded in the grooves. Shell barrel and channel barrel.
The first letter defines the stationary end head, the middle letter defines the shell type and the last letter the rear end type. Most barrels larger than mm internal diameter are fabricated from rolled and welded plate.
Tie rods and spacers are used to hold the tube bundle together and to locate the shell baffles in the correct position. Leakage of the shell side fluid between the shell and the longitudinal baffle edges must be minimized. It is more expensive than roller expansion but can produce tighter joints.
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Most nozzles are sized to match the adjacent schedule piping. They are discussed in more detail in Expansion joints.
These may be required in the shell of a fixed tubesheet exchanger or at the floating head of single tube pass floating head exchangers. Tubes may be purchased to minimum or average wall thickness.
Tie rods are circular metal rods screwed into the stationary tubesheet and secured at the farthest baffle by lock nuts. Segmentally single cut baffles are the most common, however, thermal or pressure drop may dictate baffles of more complicated shape. The success of the tube end joints is highly dependent on the correct choice of type and the experience of the manufacturer. The openings in the barrels require reinforcement in accordance with the relevant pressure vessel code which in turn will limit the maximum size of nozzle opening. Direct Contact Exchangers.
Other important heat exchanger components include those in the floating head assemblies, pk pop songs supports and rectangular headers in air cooled exchangers. The author has done a most credible job of sifting through the vast body of work in the applied heat transfer literature to produce a lucid reference document.
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