Customized Floating Head Shell And Tube Heat Exchanger Design & Assembly

Product Specification

Custom Shell and Tube Heat Exchanger Design & Assembly Services​

What is Shell and Tube Heat Exchanger?

A Shell and Tube Heat Exchanger (STHE) is a widely used heat transfer device in industrial applications. It consists of a cylindrical shell enclosing a bundle of tubes, facilitating efficient thermal energy exchange between two fluids—one flowing through the tubes (tube side) and the other around the tubes within the shell (shell side).

Key Components

• Shell: Outer cylindrical vessel, typically constructed from steel, stainless steel, or alloys.
• Tubes: Small-diameter tubes arranged in triangular, square, or rotated patterns to optimize heat transfer and cleaning.
• Tube Sheets: Perforated plates securing tube ends, often welded or bolted to the shell.
• Baffles: Direct shell-side flow, enhance turbulence, and support tubes. Types include segmental, disc-and-doughnut, and helical.
• Headers/End Caps: Inlet and outlet chambers for tube-side fluid distribution (e.g., fixed, floating, or U-tube designs).

Working Principle

• Flow Arrangements: Countercurrent (most efficient, maintains high temperature gradient) or parallel flow.

• Heat Transfer: Occurs via conduction through tube walls and convection between fluids.

• Fluid Phases: Handles single-phase (liquid/gas) and two-phase (condensation/evaporation) processes.

Types of STHE

• Fixed Tube Sheet: Tubes welded to stationary sheets; simple but limited thermal expansion handling.

• U-Tube: Tubes bent into U-shapes, allowing free expansion; ideal for high-temperature differentials.

• Floating Head: Removable tube bundle for easy maintenance; handles thermal stress and fouling.

• TEMA Classifications: Standards (e.g., TEMA A, B, C) define mechanical design and tolerances based on application.

Design Considerations

• Materials: Selected for corrosion resistance, temperature, and pressure (e.g., titanium, copper alloys).

• Thermal Expansion: Addressed via expansion joints, U-tubes, or floating heads.

• Pressure Drop: Balanced baffle design to optimize turbulence vs. pumping costs.

• Heat Transfer Coefficient (U): Enhanced by surface area, turbulence, and minimizing fouling.

• Fouling Mitigation: Regular cleaning (chemical, mechanical), material selection, and predictive maintenance.

Applications

• Power Plants: Condensers, oil coolers.

• Chemical Processing: Reactors, distillation columns.

• HVAC: Chillers, heat recovery systems.

• Oil & Gas: Refinery crude oil cooling.

• Marine: Engine cooling systems.

Advantages

• High pressure/temperature tolerance.

• Versatile for diverse fluids (viscous, corrosive).

• Scalable for large capacities.

• Robust construction with long service life.

Disadvantages

• Higher initial cost and footprint compared to plate exchangers.

• Complex maintenance (especially fixed tube designs).

• Potential shell-side leakage and fouling challenges.

Comparison with Plate Heat Exchangers

• STHE: Better for high-pressure, high-fouling applications.

• Plate: Compact, efficient for low-viscosity fluids, but less robust under extreme conditions.

Recent Advances

• Materials: Corrosion-resistant alloys and composites.

• Enhanced Surfaces: Finned tubes for improved heat transfer.

• CFD & Additive Manufacturing: Optimized flow patterns and complex geometries.

• Sustainability: Waste heat recovery integration and eco-friendly refrigerants.

This is a design and assembly service built around your process data, not a stock item. Our engineers size the floating head shell and tube exchanger to your heat duty, pressure, temperature and fouling factors, then select materials such as titanium where corrosion resistance is critical. The floating head configuration keeps the bundle accessible for inspection and cleaning, which lowers long-term maintenance cost in corrosive media service. Deliverables include GA drawings, thermal rating calculations, material certificates and CE-certified fabrication, with technical support available through installation and startup.