They are used to boil water recycled from a surface condenser into steam to drive a turbine to produce power . Most shell-and-tube heat exchangers are either 1, 2, or 4 pass designs on the tube side. This refers to the number of times the fluid in the tubes passes through the fluid in the shell.
When would you use a shell and tube heat exchanger?
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 purpose of a shell and tube heat exchanger?
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.
What is a heat exchanger used for?
Heat exchangers are used to transfer heat from one medium to another . These media may be a gas, liquid, or a combination of both. The media may be separated by a solid wall to prevent mixing or may be in direct contact.
What is the working principle of shell and tube heat exchanger?
Working Principle of Shell and Tube Heat Exchanger
The working of a shell and tube heat exchanger is fairly simple. One fluid flows inside the tubes and the other through the shell . While flowing they exchange the heats which means the cold fluid gains the heat from the hot fluid.
Why shell and tube heat exchanger is popular?
Shell and tube heat exchangers are one of the most popular types of heat exchanger because of their flexibility to accommodate a wide range of temperatures and pressures . ... Shell, or pressure vessel – is where a cooling or heating fluid will flow through to transfer heat or remove heat from a tube bundle.
What is the most effective heat exchanger?
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.
What are the 3 types of heat exchangers?
- 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 times do we have to calculate for pressure drop in a shell and tube heat exchanger?
4. How many times do we have to calculate for Pressure drop in a Shell and Tube Heat Exchanger? Explanation: For a Shell and Tube HE, we have to calculate pressure drop twice , once for the tube to check whether the equipment can handle that pressure. Similarly, the second time for the shell side.
How is shell and tube heat exchanger area calculated?
- Q = U x A x ΔTm = The log mean temperature difference ΔTm is:
- ΔTm = (T1 – t2) – (T2 – t1)
- = °F. Where:
- T1 = Inlet tube side fluid temperature; t2 = Outlet shell side fluid temperature;
- ln (T1 – t2) (T2 – t1)
Is a heat exchanger the same as a radiator?
The “heat exchanger” within a car or truck is the radiator , which is at the center of a motor vehicle's cooling system. A radiator within a vehicle is an air-to-liquid style heat exchanger constructed of materials such as copper, brass and aluminum.
Which is not an example for heat exchanger?
6. Which of the following is not an example of recuperators type heat exchanger? Explanation: Recuperators are not used in chemical factories. 7.
Do I need a heat exchanger?
Within industrial plants and factories heat exchangers are required to keep machinery, chemicals, water, gas, and other substances within a safe operating temperature.
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 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.
What are the four important parts of shell and tube heat exchanger?
- Tubes.
- Tubesheet.
- Shell and Shell-Side Nozzles.
- Tube-Side Channel and Nozzles.
- Baffles.
- Tie-rods.
