A Tube Heat Exchanger is one of the most common and widely used types of heat exchangers in industrial processes. It efficiently transfers heat between two fluids without mixing them, making it ideal for applications requiring high pressure, high temperature, or large-scale heat transfer.
Basic Construction
-
The exchanger consists of a large cylindrical shell (a pressure vessel) that houses a bundle of tubes.
-
One fluid flows through the tubes (tube-side fluid), while the other fluid flows around the tubes within the shell (shell-side fluid).
-
The tubes are mounted on tube sheets at both ends, which separate the fluids.
-
Baffles are often installed inside the shell to direct the shell-side fluid flow in a zigzag pattern, increasing turbulence and improving heat transfer efficiency.
Working Principle
-
Heat is transferred through the tube walls from the hotter fluid to the cooler one via conduction (across the wall) and convection (within the fluids).
-
The fluids can flow in parallel flow (same direction), counter flow (opposite directions—for maximum efficiency), or cross flow.
-
Counter flow typically achieves the highest temperature difference and efficiency.
-
No direct contact between fluids prevents contamination.
Main Types of Shell and Tube Heat Exchangers
There are several configurations based on design needs, particularly how the tube bundle connects to the shell (to allow for thermal expansion):
-
Fixed Tubesheet: Tubes are welded or fixed to the shell at both ends. Simple and cost-effective but limited thermal expansion; suitable for small temperature differences.
-
U-Tube: Tubes are bent into a U-shape, with both ends fixed to a single tubesheet. Allows free expansion; easier to clean tube side.
-
Floating Head: One tubesheet is fixed, the other “floats” inside the shell. Best for large thermal expansion and easy bundle removal for cleaning.
Advantages
-
Handles high pressures and temperatures.
-
Robust and reliable for dirty or corrosive fluids.
-
Easy to scale up (add more tubes).
-
Widely used in oil refineries, power plants, chemical processing, HVAC, and food industries.
* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.
Send Inquiry