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High-Tech Fishing Vessel Delivered with MAN Propulsion
Norwegian company Herøyhav AS has taken delivery of a 69.95-m trawler/purse seiner from Karstensens Shipyard, Denmark, equipped with a propulsion package supplied comprising a MAN 9L27/38 engine and a two-speed reduction gear that drives a MAN Alpha 4,200 mm diam. ducted propeller. The propeller nozzle is a customized MAN Alpha AHT design. MAN Diesel & Turbo also supplied its Alphatronic 2000 propulsion control system, including the ECO Speed Pilot for optimal voyage planning and speed setting.
The Herøyhav was ordered by the Ervik family of Fosnavåg, Norway in January 2012 and replaces a previous vessel of the same name from 1999. The new fishing vessel has been updated with modern equipment that provides flexible and economic operation, both for pelagic trawling and purse-seine fishing in the Atlantic adjacent to Norway’s coast.
A hybrid configuration is a fuel-efficient and flexible power-and-propulsion system with high redundancy. Hybrid propulsion systems are a combination of electric propulsion and diesel drive, and enable ships with variable power requirements to run at high propeller efficiency. A large number of operational modes are available, which enable the engine and propeller to run optimally over a wider power range.
The Herøyhav’s propulsion system has several power modes: both diesel-mechanical, diesel-electrical and hybrid combinations. Its auxiliary generators can deliver 1,500 kW auxiliary power to the hybrid system, which – in combination with the main-engine power of 3,285 kW – offer a total propulsion output of 4,785 kW (~ 6,500 hp) for trawling or full-speed steaming.
Environment – no oil to water
As a result of the fuel-saving propulsion setups for the various operational modes, the Herøyhav also limits exhaust gas-to-air emissions. Another, remarkable environmentally friendly feature is its coated propeller shaft, installed in combination with a water-lubricated stern-tube system, that eliminates any risk of sealing damage and any leakages of stern-tube oil to the sea in the event of impact with fishing gear wires.
WorldFishingToday - 27-03-2014