AQUA – Single stage freshwater generator

The AQUA Blue freshwater generator is a major advance based on proven Alfa Laval expertise. The AQUA Blue’s optimized process cuts seawater needs in half, which minimizes pipework and allows the installation of smaller seawater pumps. This in turn reduces installation costs, fuel consumption and CO2 emissions. 

The AQUA Blue makes use of 3 in1 plate technology, which enables desalination in a single plate pack with one type of titanium plate. Since the plate pack also contains the process vacuum, The AQUA Blue has no outer shell and is smaller than other freshwater generators. The plate pack slides open for easy access to the interior without an additional service area.

The use of corrosion and erosion-resistant titanium, combined with an optimized process that inhibits natural scaling, ensures that AQUA needs little maintenance. The system has been fully tested both on and off shore, and is designed to last the lifetime of the ship.

The AQUA Blue S-type

The story of AQUA technology is one of smart innovation that results in energy, space and cost savings. With the Aqua Blue S-type, the benefits are even more remarkable. The AQUA Blue S-type has the same high-quality and main components as the original AQUA Blue C-type, but it maximizes energy efficiency and capacity-to-footprint ratio by making use of the vessel’s existing seawater cooling system pumps. This reduces the electrical power consumption to just one-third that of conventional freshwater generators, and it makes the already small footprint even smaller.

Application

The AQUA Blue uses vacuum distillation to convert seawater into high-quality freshwater for domestic and process utilization. By providing a constant supply of low-salinity water and continuously controlling the water quality, it eliminates the need for bunker water.

The AQUA Blue is designed for automatic operation in periodically unmanned engine rooms and other automated operations. Jacket water, steam injection or a Hot Water Loop can all be used as heating media.

Capacity range

The AQUA Blue series covers a capacity range from 3.1 to 60 m3/24 h, depending on the heating medium and cooling water temperatures. An AQUA freshwater generator can be dimensioned to suit any jacket water temperature from 55-95°C at any cooling water temperature.

Basic equipment

The AQUA Blue freshwater generator consists of a single plate pack containing a flexible number of titanium process plates. These plates are suspended within a frame, which comprises a carrying bar, frame plate and pressure plate. Evaporation, separation and condensation all occur within the same plate pack.

Among the plate pack features are gaskets with rubber flaps that indicate correct plate assembly, as well as distance pipes that ensure proper plate alignment and correct tightening.

Connected to the plate pack is a combined system for feed water, condenser cooling water and ejector water. The freshwater system consists of a freshwater pump and a freshwater control sensor that ensures a stable outgoing flow.

Optional equipment

• Combined cooling and ejector water pump with electric motor
• Control panel with motor starters and salinometer
• Anti-scale chemical dosing unit for feed water

• Steam heating system with direct steam injection
• Equipment for steam boosting and hot water loop system
• Extended control panel with motor starters and salinometer
• Freshwater pH adjustment equipment
• Freshwater disinfection equipment
• Connections according to DIN, JIS and ANSI standards
• Cleaning-in-Place (CIP) unit