UNDERWATER hull CLEANING FROM BIOFOULING
with high-pressure water blowing
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UP TO 30% CHEAPER THAN CONVENTIONAL CLEANING METHODS
The best way to keep your sailing yacht clean is
For all other cases there is AQUACLEAN.TECH
Biofouling and sailing yacht. No more worries about.
AQUACLEAN.TECH offers you a simple and incredibly convenient way to clean from biofouling:
- any types of keel,
- all types of bow thrusters,
- and other underwater surfaces
of your sailing yacht from biofouling and other pollution, without risking your biological fouling system. Biofouling should no longer be a hassle for you and your sailing yacht.
AQUACLEAN.TECH offers you an easy and incredibly convenient way to clean your yacht’s hull from fouling without risking your antifouling system. We use the most advanced and technological method of non-contact cleaning – high-pressure water blasting. We have extensive experience with different materials and surfaces. Depending on the length of your vessel, the whole process will take no more than 3-6 hours. The yacht does not need to be lifted out, cleaning is carried out right in your parking place. Your personal presence is not necessary. We will make a detailed video report of state of hull surface and other underwater parts of your vessel BEFORE and AFTER cleaning.
Please watch a detailed video of the process of cleaning the hull of a sailing yacht from biofouling
Cleaning the hull of the sailing yacht from biofouling is carried out by the non-contact method with the help of seawater supplied under ultra-high pressure (UHP). We use filtration in the water intake, which allows us to remove even the smallest fraction of substances in order to avoid abrasive effects on the hull of your vessel under ultra-high pressure. Once again – the essence of our method is complete absence of abrasives. This approach will allow us to carry out work on cleaning from biofouling with minimal impact on the material of the hull of your vessel.
How to prevent Osmosis blisters on your yacht hull?
Osmosis is a problem that develops in a glass-reinforced plastic (GRP) hull that is immersed in water long-term. The main symptoms are blisters over the affected hull surface, which when opened or pierced give a smell of vinegar or acetic acid. There is no real benefit in attempting to treat small localised areas. The solution lies in removing the outer barrier layer (the gelcoat), drying the underlying laminate and actively removing the chemicals that have drawn moisture through the gelcoat barrier. Finally, reinstating the outer barrier with a new epoxy coating system.
Osmosis leads to inevitable hull destruction.
Destruction leads to significant repair costs.
The absorption of moisture occurs through micro-cracks on the hull, most of which occurs during lifting of the vessel by the crane. The method of underwater hull cleaning with ultra high-pressure water pump carefully removes any types of fouling, without causing any damage to the yacht coating.
Moreover, we 100% guarantee no scratches!
As a result, you have a clean hull and dramatically reduce the financial costs of repairs and works on renewal the antifouling coating.
STOP OSMOSIS – use contactless underwater hull cleaning!
How biofouling contributes to increased resistance to the movement of a sailing yacht
The dependence of the loss of energy of movement on the increased friction of the wetted surface of the hull and as a result of the occurrence of turbulent flows of a sailing yacht on the presence of biofouling on the hull.
Dependence of loss of kinetic energy on the increased friction of wet surface of a hull of a sailing yacht (resulting in occurrence of turbulent flows) on the presence of biofouling on the hull.
Being an object moving on the surface of the water, a sailing yacht experiences resistance of dual nature: it spends energy to overcome the viscosity of water and it also spends energy to create vibrations on the water surface – i.e. ship waves.
If you carefully observe the moving yacht, you can see that some of the water moves with it. The yacht, even if her hull is completely smooth, is accompanied by a layer of water. At low speeds, the flow of water that flows around the bottom has an orderly movement (this is a laminar flow), and at high speeds – random movement (turbulent flow). The molecules of the liquid directly adjacent to the surface of the moving body stick to it; as a result, a transition boundary layer is formed next to it, in which a large velocity gradient occurs.
The formula defining the amount of friction resistance has been developed by an English naval architect Mr. William Froude. He found out that the resistance depends on the size of the underwater part of the hull, the state of the outer surface and is proportional to the square of the speed. A longer submerged part has a lower specific resistance as compared to a shorter one. A rougher surface creates more friction than a smoother surface.
Vortex resistance increases with increasing speed and is the cause of turbulence. Turbulent flow is characterized by vortex formation, mixing of fluid, as well as velocity and pressure pulsations, which are complex and vary in time and space.
On rough surfaces, turbulence increases significantly, and the degree of roughness affects the turbulence exponentially upward.
What happens to the dynamic characteristics of the hull when biofouling begins to appear on it?
The absolutely clean and smooth hull of a sailing yacht, having a modern technological high-gloss coating, still has a certain degree of roughness, albeit quite insignificant. But as soon as the hull enters an aquatic environment filled with living microorganisms, an irreversible process of biofouling instantly starts. The whole spectrum of living creatures of different sizes settles on the hull, ranging from microscopic in the early stages of biofouling, and ending with meter-thick algae on especially neglected yachts. The greater its roughness, the greater the friction of water. Overgrowth of the bottom in the biological conditions of the Adriatic aquatic basin increases friction up to 50% per year. For two years, this figure can reach 100%, that is, the friction of the body against water will have a double indicator. In the case of very heavy fouling, when a hanging beard of shells and small algae is formed on the lower part of the yacht, friction sometimes increases even by three or even 5 times compared to friction with a smooth bottom.
All these losses are irretrievable. Wind energy transmitted by the sails into the energy of movement is expended on the occurrence of turbulence on a rough hull due to increased friction of the hull surface covered with biofouling on the viscous surface of the water.
The problem of losing dynamics has a solution
Timely cleaning of the hull by AQUACLEAN.TECH specialists helps to significantly reduce the friction coefficient of the hull and return high dynamic performance to your yacht. Use our calculator and find out the cost of cleaning your vessel from biofouling. Subscribing to a periodic service will help reduce the overall cost of cleaning. Recall that the cleaning of the underwater part of the hull is carried out by our specialists right in your parking place, therefore no need to pull out your yacht with a crane, and also no need of your personal presence. As a result of the cleaning you will receive a comprehensive video report and free inspection of the underwater part of the hull. Order underwater biofouling cleaning by the contactless method now!
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