All around us there are installations where there are needs for improved separation from flying water droplets in the air. This is not only critical naval installations on boats or of shore oil platforms, or in areas where there is a rain of tropical nature.
This also applies to many existing installations where traditional air intakes inlet grids are forced to work with the high air speeds
By using weather protection inlet grid grill designed with Vane profiles of the type InoVane®, which is designed to drain and eliminate the separated water to a higher air speed, problems can be avoided with the ingress of water.
As a bonus, we also provide a much lower pressure drop, saving energy in the system.
Marine grade air intakes with superb separation from water mist out of the air on ship, vanes in combination with vanes and coalescor filters will secure the functionality, two stage moisture separators are selected when a higher degree of protection is required, above that afforded by a single stage separator, for the removal of small aerosols and airborne particulates.
InoVane® is a water droplet separator that utilizes water droplet own operating energy to separate water droplets from the air stream. This is done by means of specially shaped labyrinth Vane profiles which controls the air in such a manner that water droplets own kinetic energy forces the water to separate away from the air stream.
The separated water droplets then drained vertically downward by its own weight, InoVanes internal drainage is designed so that the water never will be drawn back to the air stream.
InoVane® weather louvre protection inlet grid grilles water mist and droplet elminitator can be combined with a de-misting coalescor filter to further increase the degree of separation of very fine water droplets and filter the existence of flying solid particles that may occur at sea off lands such as desert or heavy industry. The optional heated Vane separator guarantees a high degree of moisture droplet removal over a range of droplet sizes even in cold weather.
InoVane® weather protections are available in several different variants and materials. Common for the different variants of the InoVane® is that it recognizes the systems air velocity as a factor of the channel’s gross area, this differs from traditional types where you need to reduce about 50% of the channel’s gross area to obtain its design velocity.
As more ships and offshore installations are required to operate in very cold environments, heated vane intake separator design developments have been introduced to ensure that the air inlet systems for machinery and prime movers remain open and the free passage of air is not blocked by ice or snow.
Heated separator with anti-icing may offer self-limiting electrical heat trace cable on every individual vane for effective prevention of ice and snow build up.
The heated Vane separator guarantees a high degree of water mist/moisture droplet removal over a range of droplet sizes. These units are capable of handling high water loading and display low pressure drop characteristics. The anti-icing system is also available in ATEX performance.
Recommended air velocity for a traditional type is about 1-2 m / s calculated at the channel net area (50% of gross area) , using InoVane® would the area of this vent easily be reduced by 50% , or flow can be increased by 100% or more.
In the InoVane inertial separator the labyrinth brings the air to turn, water droplets with higher kinetic energy collide with the vertical profiles and are then separated from the air stream, the water droplets are captured in the channels of the InoVane profiles and then flows downwards to finally be drained out of the system.
Integrated Filter Solution with InoVane® water air intake droplet separator grid grille.
Multi step solution with integrated filter housing, de misting mesh and fine filters, silencer, service doors, drain systems, transmitters.
These systems are tailor made for each installation and application. Often Electrically pre-wired and designed to be easy to install and erected on site.
Drop size limitation
InoVane® S100 Lv = 15-21 µm
InoVane® S170 Hv = 15-23 µm
With the drop size limitation means the smallest droplet size which is fully separated out from the air stream.
Comparatively droplet size in”real world”.
Mist: 50 – 100 µm
Drizzle: 200 – 500 µm
Raindrop: 500 – 10.000 µm
Combustion air intake water droplet mist separator to engine room, specially adapted and built to Swedish Rescue Association – Boat Lars Prytz.
Air intake with Weather Hood, InoVane Water mist droplet separator designed for oil platform, systems performed with filter housing, air filters. Produced in stainless steel and plastic InoVane vertical chevron vanes.
The InoVane® Water separator type two and three stage systems have a droplet removal efficiency of 100% for water droplets.
The limitation to drop size means the smallest drop which is completely separated by the system. The limit drop size is measured in microns (0,001 mm = 1/1000 mm). As example a normal human hair is 75-200 µm. Rain drop appr. 200-10,000 µm. Mist appr. 80 – 200 µm.
The total efficiency for the two and three stage system are based upon filter classification for the final filters.
Pressure Drop through the InoVane® Water is low due to its airfoil design. Pressure Drop is based upon laminar air flow in the units, other pressure drops caused by shape of aggregates, frames aso is not taken into consideration.
The water separation efficiency is dependent on well proven design of the InoVane weather protection Vanes, distance between these InoVane® profiles, air velocity and installation details, 7 Way will guide you and your team in order to make the best possible installations.
Test results shows that vane profiles used in InoVane® intake systems fulfill the normative standard Eurovent 2/5 for intake systems with large margin.
Eurovent 2/5 demands that systems must eliminate water loads of approx. 1,5 l /m2 / min.
InoVane® is capable to handle water loads more than factor x10 based on Eurovent 2/5 . At this very high load, the system shows a separation efficiency of 100 % at tested droplets.
Our Air Intake solutions are designed and produced in Sweden, our design teams have a very long experience with installations for marine vessels, power plants, oil platforms etc