Last week, Jiangsu Yangzijiang Shipbuilding Ltd. launched Yno YZJ2010-931, the Vectis Eagle, the first vessel of the ‘Super Green 8500’ type for Carisbrooke Shipping. It is the first Chinese shipyard to launch a vessel with a Groot Cross-Bow. Our Photo Albums-page contains https://www.swzonline.nl/fotoverslag/48[extra pictures of the ship and launch] and we have a https://www.swzonline.nl/weblog/3.
Dutch naval architect https://www.grootshipdesign.nl/[Groot Ship Design] created the design for the innovative multipurpose cargo vessel, the 8500 dwt Super Green 8500, for Dutch/British Carisbrooke Shipping. Carisbrooke then contracted Yangzijiang Shipbuilding for building four vessels, which was soon followed by a second contract for four more vessels lengthened up till 10000 dwt; the Super Green 10000. The project is partly financed with support of EFRO (European fund for regional development) of the European Committee with assistance of the Dutch province Zuid-Holland (Subsidieregeling Clusterprojecten Zuid-Holland onder het OP Kansen voor West).
30% Lower Fuel Consumption
Both designs have a Groot Cross-Bow. The vessels also have the latest design methods and features, realizing a high payload and flexible cargo intake in combination with a speed of over 12 knots. The vessels boost a lower fuel oil consumption than other vessels of equal size. Carisbrooke expects a reduction in fuel consumption up to 30% compared to vessels of equal tonnage. This is realized without special equipment or installations onboard. The EEDI (energy efficiency index) for the 8500 is calculated at 9,72; much better than many other designs and much lower than the per 2025 required index of 13,3.
Ship Design
The 8500 has a single cargo hold, is equipped with tweendecks panels and grainbulkheads allowing variations in the number of decks and compartments. The vessel is also equipped with two cargo cranes of 80 tons each. Included is ice class 1A according Finnish/Swedish rules, the combination with a main engine of only 2400 kW (which is extreme for this size of vessel) is possible because of a large diameter propeller and high efficient nozzle. An excessive program of model tests was run at HSVA at Hamburg and showed the great performance of the vessel in ice.
The 10000 is almost equally executed, because in the original design the possibility of lengthening the vessel was already considered. The biggest difference is the two hold execution.
Groot Cross-Bow
The Groot Cross-Bow is an innovating bow based on the so called ‘wave piercing’ principle, the bow cuts through the wave instead of riding onto the wave. Groot Ship Design designed the bow, the hull lines and the configuration of propeller and nozzle in-house and in close cooperation with Carisbrooke. Compared to conventional bow designs with flare, a vessel with a Cross-Bow will have a smooth ride with less pitching and less waste of energy and thus less consumption of fuel oil. Another advantage is the increased comfort for crew in heavy conditions and less danger for damaging the cargo in heavy seas or bad weather.
