Shell Tube Heat Exchangers
Shell & tube heat exchangers are the preferred choice in industrial applications where mechanical strength, thermal stability, and pressure integrity are critical.
In refineries, petrochemical plants, power stations, chemical facilities, and heavy manufacturing environments, process conditions routinely exceed the limits of lighter exchanger designs. Shell & tube construction provides the structural reliability required for continuous-duty operation under demanding loads.
Atmax Filtration designs and supplies shell & tube heat exchangers tailored to specific thermal duties, pressure ratings, and material compatibility requirements for USA and Middle East industrial operations.
Operating Principle
One fluid flows through the tube side, while the second fluid flows across the tube bundle within the shell side. Heat is transferred through the tube wall by conduction, while convection governs heat transfer on both fluid sides.
Shell-side baffles direct the flow across the tube bundle, increasing turbulence and improving the overall heat transfer coefficient while also supporting the tubes mechanically.
A shell & tube heat exchanger consists of:
- A cylindrical pressure shell
- A tube bundle (straight or U-tube configuration)
- Tube sheets
- Baffles
- Channel covers and nozzles
The design accommodates both single-pass and multi-pass flow arrangements depending on the required temperature approach and allowable pressure drop.
Thermal Design Parameters
Proper sizing requires a detailed evaluation of
- Heat duty (kW or kcal/hr)
- Inlet and outlet temperatures (both fluids)
- Log Mean Temperature Difference (LMTD)
- Overall heat transfer coefficient (U-value)
- Fouling factors (based on fluid characteristics)
- Maximum allowable pressure drop
- Flow velocity (tube and shell side)
Design calculations ensure adequate surface area while maintaining velocity within recommended limits to prevent erosion, vibration, or fouling accumulation.
Where necessary, thermal rating and simulation are performed to validate performance under variable load conditions.
Mechanical Design Considerations
Mechanical design is governed by:
- Design pressure (shell and tube side independently)
- Design temperature
- Corrosion allowance
- Material compatibility
- Thermal expansion differential
- Vibration analysis
- Nozzle load conditions
Depending on service, exchangers may be designed to meet applicable pressure vessel standards and client specifications.
Tube-to-tube sheet joints may be expanded, welded, or both, depending on operating pressure and service severity.
Available Configurations
Fixed Tube Sheet
- Economical construction
- Suitable for moderate temperature differentials
- Tube-side cleaning possible
- Shell-side cleaning limited
U-Tube
- Accommodates thermal expansion between the shell and tubes
- Suitable for high temperature differential service
- Fewer tube sheet joints
- Tube-side mechanical cleaning is limited to one end
Floating Head
- Designed for services requiring frequent cleaning
- Accommodates thermal expansion
- Allows removal of the tube bundle
- Preferred in fouling or heavy-duty applications
Configuration selection depends on thermal expansion, maintenance strategy, and process fluid characteristics.
Applications
Shell & tube heat exchangers are commonly used in
- Hydrocarbon cooling and heating
- Crude oil preheating
- Reactor temperature control
- Steam condensation
- Thermal oil isolation loops
- Boiler feed water heating
- Waste heat recovery systems
In thermal fluid heating systems, shell & tube exchangers are frequently used to isolate process equipment from the primary heating circuit.
Contact us today at sales@atmaxfiltration.com or call (816) 745-9994 to discuss your requirements.
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- 2101 Park Ave, South Plainfield New Jersey 07080, USA
- sales@atmaxfiltration.com
- (816) 745-9994
- Mon – Fri : 8:00 AM to 7:00 PM
Atmax Filtration provides high quality dust collectors and accessories and supplies in the entire New Jersey.
For more information talk to us on (816)-745-9994 or write at sales@atmaxfiltration.com
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