What is a heat exchanger bundle?
As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids.
What is a tube bundle heat exchanger?
Tube bundles are found inside shell and tube heat exchangers. The tube bundles are positioned within a cylindrical shell, where fluids at different starting temperatures pass through and over tubes. Having more tubes in the tube bundle increases heat transfer because there is a larger heat transfer surface.
What does tube bundle mean?
A tube bundle is a set of tubes in a shell-and-tube heat exchanger. A set of tubes is called the tube bundle and can be made up of several types of tubes. In a shell-and tube-exchanger the tube bundle is enclosed in a cylindrical shell, through which the second fluid flows.
What is the purpose of tube bundle?
Tube bundles are often housed in outer casing or a tubular shell with a constant flow of fluids moving through it. There are tube bundles that allow liquid to liquid heat exchange as well as steam to liquid heat exchange.
Why shell and tube heat exchanger is used?
Shell and tube heat exchangers make it possible to pump materials as soon as possible, and they transfer temperatures efficiently so you can ensure the materials are at the necessary temperature without expending extra energy to do so.
Why do we use shell and tube in heat exchanger?
Shell and tube Heat Exchangers have the ability to transfer large amounts of heat in relatively low cost, servicable designs. They can provide large amounts of effective tube surface while minimizing the requirements of floor space, liquid volume and weight.
What are the different types of shell and tube heat exchanger?
The three flow types of shell and tube heat exchangers are parallel, counter, and cross. The design, operation, and applications necessitate the three flow types be used in combinations. Parallel flow is when the shell and tube sides enter the heat exchanger at the same end and flow directly to the opposite end.
How do you determine the tube bundle diameter?
This dimension includes any baffles or tube supports. A good way to get an accurate “D” diameter is to measure the circumference and divide by 3.14. This gives you the diameter of the bundle.
How do you create a shell and tube heat exchanger?
GENERAL DESIGN CONSIDERATIONS More viscous fluid should be located on the shell side. Lower the flow rate stream should be placed on the shell side. Consider finned tubes when the shell side coefficient is less than 30% of the tube side coefficient. Do not use finned tubes when shell-side fouling is high.
Which is better shell and tube or plate heat exchanger?
Plate heat exchangers are up to five times more efficient than shell-and-tube designs with approach temperatures as close as 1°F. Heat recovery can be increased substantially by simply exchanging existing shell-and-tubes for compact heat exchangers.
What is the removable bundle on a heat exchanger?
Removable Bundle – A heat exchanger that has a removable tube bundle from the shell casing. This provides easy cleaning of the shell side and also a more feasible way of replacing depleted tubes. Reversing End – The end of a multi-pass heat exchanger where the tube side fluid reverses its flow.
Can a tube bundle be removed from an exchanger?
If the design of the exchangers permits, the tube bundle can also be removed for repair & cleaning. Tube bundles and head and shell covers can be removed by built in fixed handling devices (davits, pulling posts), fixed structures with trolley beams, or by mobile equipment (eg. Crane).
Why are baffles used in a shell and tube heat exchanger?
Baffles are installed in the shell of the shell and tube heat exchanger to create more turbulence and increase the flow time so that better heat exchange is possible. Baffles support the tubes so that damage and vibration of tubes are minimized.
How to design a shell and tube heat exchanger?
Process Design of Shell and tube Heat exchanger 1 the front and rear header type, 2 shell type, 3 the sides the fluids are allocated, 4 baffle type and baffle pitch 5 tube diameter, length and tube layout 6 shell diameter, and 7 number of tube passes More