|
Operating Principle
After installation, the insert stays under tension. Under the effect of the
circulating flow, it enters into vibrations, radially and axially. The
repeated contact between the turns of the device and the inner tube
wall has two effects:
- to prevent the formation of deposits
- to break the boundary layer in the tube side flow
As a consequence, the mechanical effect of the SPIRELF system reduces
fouling buildup inside heat exchanger tubes and the turbulent effect
achieves an improvement of the heat transfer rate. (The internal heat transfer
coefficient is multiplied by 1.8)
Overall, the sum of these two effects results in a reduction of the
apparent fouling factor by as much as three quarters.
|
