What is a Hairpin Heat Exchanger ?
Hairpin Heat Exchanger can be termed as a single pass shell and tube heat exchanger that is foiled in a half, the same as a hairpin. Hairpin Heat exchanger is also named as G – Fin Heat Exchanger, Double Pipe Heat Exchanger or Multi Tube Heat Exchanger. The only difference between the hairpin heat exchanger and traditional shell and tube heat exchanger is the tube bundle that is removable and the accommodation of thermal expansion with no special adjustments and joints. There are many advantages of hairpin heat exchangers during the last 20 years and many improvements were made in bolting, integrating the parts, boiling and many more.
The Need to use a Hairpin Heat Exchanger –
A hairpin heat exchanger is used when one or more following requirements are needed.1. When the process uses a temperature cross.
2. When high pressure exists on the tube side.
3. When the pressure drop at allowable shell side is low.
4. When it is a cyclic service.
5. When there are high flow rate ratios between tube side and shell side fluids.
6. When there is a high terminal temperature difference.
7. When the heat exchanger is subjected to thermal shock.
8. when the flow induced vibration occurs.
9. When the process involves heating or cooling vapours.
10. When any solids are present in the steam process.
Advantages of hairpin Heat Exchangers –
1. Hairpin Heat Exchangers can operate in true counter current flow which exceeds to the extreme temperature limit.
2. Hairpin Heat Exchangers are economical and are adaptable to service differentials.
3. Hairpin Heat Exchangers are ideal for a wide range of temperatures.
4. Hairpin Heat Exchangers reduced thermal design, shop fabrication cost and drafting.
5. Hairpin Heat Exchangers provides shorter deliveries due to the only reason of standardization of design.
6. Hairpin Heat Exchangers consists of longitudinal fin tubes which are welded for resistance for high heat transfer.
7. Hairpin Heat Exchangers are available in a very wide range of sizes to need the desired requirements.
8. Hairpin Heat Exchangers can be dissembled and assembled easily and are always ready for process piping connections.
9. Hairpin Heat Exchangers can be modified to meet any desired type of process.
10. Hairpin Heat Exchangers are ASME inspected. ASME stands for The American Society of Mechanical Engineers.
These are the advantages of Hairpin Heat Exchangers.
There are even the disadvantages of hairpin heat exchangers, but the advantages are far more than the disadvantages. So all the disadvantages of the hairpin heat exchangers are considered negligible.