Harsonic - Boxcoolers
From Professional Marine & Offshore
On a seagoing vessel there is in general a lot of cooling required. This is done traditionally, by using seawater, bringing into the vessel through the sea chest, and then use this seawater for cooling. In principle , a boxcooler is a pipe bundle, as known from tubular heat exchangers, which is put direct in the seawater, whereas the seawater can be used direct for the cooling of the different processes on a vessel. These pipe bundles are installed in special compartments, where the ship is open to the sea, so all time seawater is around the tubes of the box cooler. Bringing in huge amounts of seawater inside a vessel, boxcoolers are always potential fouling victims. Barnacles, mussels, algae, and other types of shellfish grow on the tubes of the boxcooler and thus affect its heat transfer function.
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Classical methods, as using chemicals, to avoid scale or even sea growth are not possible to use in this case, as the chemicals would be needed to put direct in the seawater, what will never work due to the amount of seawater and as well due to the regulations and other authorities.
After a chemical or heated treatment, the bio-film will grow immediately back. So the procedure today is as soon the cooling is not sufficient anymore, the box cooler has to be removed, cleaned and brought back in operation . Of course during the cleaning the vessel can’t be in operation, so this cleaning is very expensive for the ship owners and fouling can start again.
The well known cathodic protections , are expensive and don’t always offer the required no growth warranty. Then the vessel still needs to go in dry dock for cleaning or repairs due to fouling.
Harsonic for Boxcoolers protects 24/7 the boxcooler on low voltage , the sea-chest and the cooling tubes remain free of growth and biofilm
- Harsonic® for Boxcoolers gives increased cooling efficiency and improved reliability
- Harsonic® for Boxcoolers means substantial savings on maintenance costs and there is no need for dry docking
- Harsonic® for Boxcoolers avoids the use of chemicals and protects the environment
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