Shell heat exchangers

Frequently, the difference ia exchanger type does not influence the desired topology to any significant extent. For iadustrial problems, however, it is necessary to consider iadividual heat-exchanger shells rather than just the match that is called the heat exchanger. If a high level of heat recovery is desired, the effect of the F factor can be important. This problem has been solved but is beyond the scope of this article. 

U-Tube Heat Excbajiger (Fig. 11-36J) The tube bundle consists of a stationaiy tube sheet, U tubes (or hairpin tubes), baffles or support plates, and appropriate tie rods and spacers. The tube bundle can be removed from the heat-exchanger shell. A tube-side header (stationary head) and a shell with integr shell cover, which is welded to the shell, are provided. Each tube is free to expand or contract without any limitation being placed upon it by the other tubes. 

Shell Sizes Heat-exchanger shells are generally made from standard-wall steel pipe in sizes up to 305-mm (12-in) diameter from 9.5-mm (ys-in) wall pipe in sizes from 356 to 610 mm (14 to 24 in) and from steel plate rolled at discrete intervals in larger sizes. Clearances between the outer tube limit and the shell are discussed elsewhere in connection with the different types of construc tion. 

Determination of Sheii and Tube Heat Exchanger Shell Diameter... 

Fowler, D.W., T.R. Herndon, R.C. Wahrmund, 1968, an Analysis of Potential Overpressure of Heat Exchanger Shell Due to a Rupture Tube, presented at the American Society of Mechanical Engineers Petroleum Division Conference, September 22-25, 1968. 

Heat Exchanger - Shell and tube and double pipe exchangers, where the cooler side can be blocked in full of liquid while the hot side fluid flow continues, must be protected by either ... 

An alloy steel heat exchanger shell had been fitted with two large carbon steel flanges. The flanges were stamped as alloy. 

When a fluid flows over a stationary or moving surface, the pressure of the fluid decreases along the length of the surface due to friction. This is commonly called the pressure drop of the system. Of particular interest are the pressure drops in pipes (tubes) and in heat exchanger shells. 

Whitley, D. L., Galculating Heat Exchanger Shell-Side Pressure Drop, Chem. Eng. Prog, V. 57, No. 9, p. 59 (1961). 

Heat exchanger, shell-and-tube heat exchange area, 0.6-2.9 m volume, 0.5-4 m 0.43... 

DETERMINING SHELL AND TUBE HEAT EXCHANGER SHELL DIAMETER... 

CC. Base metal Assuring and surface blistering in heat exchanger shell. 

II. Blistering and base metal attack in a heat exchanger shell. 

Heat exchanger shell failure released gas causing a explosion to occur and process fires to start. 

Failure of Heat Exchanger Tubes If a heat exchanger shell rating is less than the pressure level of the circulating medium and an internal heat exchanging tube ruptures or leaks it will overpressure the vessel. 

Condenser, reboiler, heat exchanger (shell and tube) Heat transfer surface area, type, shell design pressure, materials for shell and tube... 

Heat exchangers Shell-and-tube Double pipe... 

Heat exchangers, shell and tube, carbon steel/aluminum 2.2 storage, stainless steel 1.5... 

Fredheim, A.O. Thermal design of coil-wound LNG heat exchangers, shell-side heat transfer and pressure drop , Dr.ing. thesis, NTH, 1994... 

Heat exchanger, shell and tube, floating head, c.s. 100-400 ft2 0.60... 

Heat exchangers. Shell-and-tube type (for condensers and heaters) ... 

Tubes can completely fill the heat-exchanger shell. Clearance between the outermost tubes and the shell is omy the minimum necessary for fabrication. Between the inside of the shell and the baffles some clearance must be provided so that baffles can slide into the shell. Fabrication tolerances then require some additional clearance between the outside of the baffles and the outermost tubes. The edge distance between the outer tube limit (OTL) and the baffle diameter must be sufficient to prevent vibration of the tubes from breaking through the baffle holes. The outermost tube must be contained within the OTL. Clearances between the inside shell diameter and OTL are 13 mm V2 in) for 635-mm-(25-in-) inside-diameter shells and up, 11 mm (Vie in) for 254- through 610-mm (10- through 24-in) pipe shells, and slightly less for smaller-diameter pipe shells. 

Heat-transfer coefficient for cross flow over an ideal tube bank Fouling coefficient on outside of tube Heat-transfer coefficient in a plate heat exchanger Shell-side heat-transfer coefficient Heat transfer coefficient to vessel wall or coil Heat transfer factor defined by equation 12.14 Heat-transfer factor defined by equation 12.15 Friction factor... 

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