Drinking seawater

How much energy does it take to make drinkable freshwater from seawater? With Alfa Laval’s AQUA freshwater generator, it takes 50% less electrical energy and much less space than comparable generators.

Building a truly different freshwater generator required working in a truly different way. After 20 years of little progress on the desalination technology front, Alfa Laval set out to revolutionize the way freshwater is made at sea.

The result? The AQUA freshwater generator, probably the smallest, most energy efficient of its kind that produces potable water using waste energy. To date, orders for AQUA include 176 new vessels.

Powerful new plate design

Many plate-based desalination systems require two separate plate packs within a large vacuum chamber to handle evaporation and condensation. This means seawater in its different states has to travel from one plate pack to another before reaching a freshwater state. That's a long road to desalinate seawater.

Enter the AQUA with the three-in-one titanium plate advantage. The plate pack itself contains the whole vacuum desalination process so that no outer shell is required, and chameleon-like plates that make easy work of desalination, changing function according to process requirements. At the lower end, evaporation of seawater takes place. Separation of entrained seawater is handled at mid-section and, at the top, condensation.

The result is greater electrical energy efficiency and faster access to freshwater. Combine that with the other technological advances and you get a freshwater generator that's speedier and more efficient than previous generations of plate-based desalination systems.

Where less is more

By streamlining the entire process flow, the AQUA provides more freshwater using less of everything: Less seawater, less electricity, less space, less weight and no hold-up volume.

Less seawater. AQUA requires 50% less briny water to produce the same amount of low-salinity water as comparable freshwater generators.

Less electricity. AQUA effectively produces potable water using smaller pumps and therefore minimal electricity due to a 50% cut in pumping requirements. That means less bunker fuel is used to generate electricity, which reduces CO2 emissions.

Less space, less weight and no hold-up volume. With no outer shell, AQUA unclutters your space, making installation and service access easy. Its small footprint, low-weight and smaller pipes for installation open up other possibilities to save money.

Simplicity at its best

Relatively small and exceptionally lightweight, the AQUA is unbelievably simple and hassle-free, from installation to operation and maintenance. At its smallest, the AQUA takes up just 1160 x 850 x 1385 mm of space on board, including service area. Even with its largest plate pack spreading out at 2165 mm, the space is well worth the investment.

Depending on which automatic model you choose, the AQUA freshwater generator is capable of producing between 3.1 to 60 cubic meters of freshwater in 24 hours. This gives you plenty of flexibility to meet your freshwater requirements. Plus its modular design lets you easily expand the plate pack when your needs change.

Guaranteed maximum salinity of 2.0 ppm

Getting a constant supply of low-salinity water on board can't get any easier than with the AQUA. Even in the roughest conditions, AQUA generates fresh water with a guaranteed maximum salinity of 2 ppm. And although Alfa Laval hasn't entered the AQUA in any water-tasting contests, the entire process of producing and drinking freshwater made of seawater can't get much better.

Alfa Laval Corporate AB

Rudeboksvägen 1 SE-226 55 Lund Sweden

Phone: +46 46 36 65 00

E-mail: info@alfalaval.com

Go to Index of # 3(33) 2010



# 3(33), 2010