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The
InvisiHead
Intake
Head System
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The InvisiHead seawater intake head - an omni directional funnel-out sequential flow-phase transitional
intake head system that adds to the performance
of the offshore systems. It is fitted to the upstream end of seawater
intake pipelines located some distance into the sea from the shoreline.
The entrance velocity is lower than 0.09 m/s (< 0.3
fps). The
approach velocity is extremely slow <0.002 m/s (< 0.0065 fps) at
5
meters away - the InvisiHead intake head becomes hydraulically
invisible
to suspended matter. In other words, the intake head does not act as a
sink point or a suction source and therefore does not suck in debris. Floor sand, silt, and
tiny larvae (< 20 umg) remain undisturbed by the the lower flow
streamlines
taking off from the sea floor. The super slow entrance velocity also
leads to lower head losses and lower level drawdown at the pump intake
basin onshore. the head loss at the InvisiHead is at a negligibly low
0.00017 m.
The InvisiHead entrance section is hydraulically
fine-tuned in lab to optimize system hydraulics. The entrance dimensions
are not arbitrarily selected but hydraulically calculated in a multi dimensional
approach. Each dimension is a function of the steady flow velocity. Eddies
through this approach are totally eliminated.
The InvisiHead System is made of
relatively thick duplex or 316L stainless to form a robust stable long-life
seawater intake structure. It can be supplied with
a built-in anti biofouling dispensing system to be connected with an
onshore
disinfectant source through HDPE or PVC hose. The system is designed so
that 100% of the disinfectant dispensed remains in the water flowing
into
the intake pipeline and none flows outside of the system.
More
details
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© 1989-2018 ELMOSA.American Eco Systems Corp All rights reserved
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