High Efficient Twisted Tube Heat Exchanger For Petrochemical Industry

High Efficient Twisted Tube Heat Exchanger For Petrochemical Industry

Based on the traditional tube & shell heat exchanger, the Twisted Tube Heat Exchanger replaces the plain straight tubes with oval twisted tubes as the heat transfer components. The cross section along the length direction forms an oval spiral channel so that complicated flow featured by rotation of the fluid is caused to produce strong rotating turbulence. Tubes at shell side of the heat exchanger are supported by contacts at long axis of neighboring tubes (as fig.1-1), which eliminates the necessity of baffle plate and enables compact arrangement of tubes in the shell. In this way, it reduces the size and weight of heat exchanger and overcome the vibration of heat transfer tubes.

Work Principle / flow

The spiral channel causes longitudinal rotation and secondary swirl of fluid when the fluid flows through, and such swirl intensifies the turbulence, reduces the boundary layer of heat transfer and improves the mixing of fluid. Accordingly, the improved mixing maintains higher temperature gradient near the tube wall and results in higher Nu value and thus greatly increases coefficient of heat transfer.

                                 Fig. 2-1 Flow mechanism in tube

                                Fig. 2-2 Flow mechanism at shell side

Specification

Advantages

1. Low pressure drop.
2. High heat transfer efficiency.
3. Reduced fouling.
4. No dead zone of flow, hard to block up.
5. Capable of overcoming induced vibration, improved reliability.
6. Advanced calculation software for reliable and reasonable design.
7. Rich fabrication experience for safe and reliable product.
8. Sufficient stock for quick delivery.
9. Efficient management for lower cost.

Workshop