What is the purpose of floating head in heat exchanger?
The tubesheet at the rear header end of the shell is of slightly smaller diameter than the shell, allowing the bundle to be pulled through the shell. The use of a floating head means that thermal expansion can be allowed for and the tube bundle can be removed for cleaning.
What is a floating head?
Definition of floating head : a flesh hoop of a drum entirely free from the shell.
What type of heat exchanger is a shell and tube?
A shell and tube heat exchanger (STHE) is a type of heat exchanging device constructed using a large cylindrical enclosure, or shell, that has bundles of perfectly spaced tubing compacted in its interior. Heat exchanging is the transfer of heat from one substance or medium to a similar substance or medium.
What is a shell and tube heat exchanger used for?
Shell and tube heat exchanger is used in various industrial process applications because they can perform tasks such as: Removal of process heat and feed water preheating. Cooling of hydraulic and lube oil. Cooling of turbine, compressor, and engine.
What is the advantage of the floating head heat exchanger over the conventional fixed head heat exchanger?
Floating Head Heat Exchanger Advantages The heat exchanger can be operated under high temperature and high pressure, the average temperature is less than or equal to 450℃，and pressure is less than or equal to 6.4MPa. This kind of heat exchanger is suitable for the serious scaling occasion.
What are the types of heat exchanger?
What Are The Different Types Of Heat Exchanger?
- Finned Tube Heat Exchanger Or Air Cooled Heat Exchanger. Suitable for: air/gas to fluid.
- Shell And Tube Heat Exchanger. Suitable for: fluid to fluid / fluid to gas.
- Plate Heat Exchanger Or Gasket Plate Heat Exchanger. Suitable for: fluid to fluid / fluid to vapour.
How many gaskets are in a floating head heat exchanger?
This joint has two gaskets, one between the shell flange and tube-sheet, and the other between the tube-sheet and the channel flange. Both gaskets are compressed by a single set of fasteners. These are exposed to the atmosphere; the pressure is only internal.
What are the two types of heat exchangers?
There are two main types of regenerative heat exchangers—static heat exchangers and dynamic heat exchangers.
What is a tube in tube heat exchanger?
Exergy LLC, tube-in-tube heat exchangers consist of two tubes, an inner and an outer coiled together. This unique, compact design prevents thermal fatigue, increases efficiency and reduces the overall size. It is ideal for high temperature, high pressure and low flow applications.
What are different types of heat exchangers?
Which heat exchanger is most efficient?
Plate exchanger is the most efficient due to turbulent flow on both sides. High heat-transfer coefficient and high turbulence due to even flow distribution are important. However, a plate heat exchanger regenerator is restricted to low viscosities. With high viscosities, a special tubular may be required.
Why shell and tube heat exchanger is better than double pipe heat exchanger?
A shell and tube heat exchanger is more efficient as it can have multiple passes for the fluid to stay longer in contact with heating material (fluid in this case). Longer contact time and higher heat exchange surface area allows greater heat transfer rates which is in accordance with Nusselt’s equation.