Views
6 days ago

MEM54

Marine Engineers Messenger, Volume 3, Issue 54

NEW ERA FOR SUBSEA

NEW ERA FOR SUBSEA MINING Nautilus New Era, the world’s first 227m subsea mining vessel, successfully launched on March 29. The subsea mining vessel, constructed by Mawei Shipbuilding for MAC, is the largest offshore construction project in the Fujian area in terms of size and value. The innovative design integrates functions, including subsea exploration, mining, and mineral pretreatment and is equipped with a mining system, mineral lifting system, dehydration system, and loading/unloading system. The advanced dieselelectric vessel will be classed as ABS DPS – 2 EHS – F, will be Tier III compliant and will be able to work in and traverse ECA areas. With 15 years of collaboration with ABS, Mawei Shipbuilding has built more than 100 vessels, including state-of-the-art offshore support vessels, a compact semisubmersible, a diving support vessel, asphalt carrier, and this recently launched subsea mining vessel. DE HOOP DELIVERS AMADEUS QUEEN Netherlands-based Shipyard De Hoop has recently delivered its fifteenth river cruise vessel to Lüftner Cruises. The Amadeus Queen is based on the award-winning Amadeus Silver series of ships, but offers further innovative developments. This new flagship of Austria’s river cruise specialist features a new approach to public area design, with an all-glass entrance-atrium, containing the reception desk and centrally placed grand staircase as well as a separate travel desk. This change to the structural longitudinal stiffness, usually supported by steel, is mostly glass. A weight increase caused by the redeveloped luxury aft area was a specific challenge, as the aft underwater ship does not provide much buoyancy. As such, the engine room had to be completely reengineered. The vessel features an ergonomically designed hull shape, combined with a propulsion system based around two Caterpillar 3508 main engines, rated at 783 kW @ 1600 rev/min. This arrangment was found to delliver higher efficiency, lower fuel consumption and reduced exhaust emission levels. The engines drive two Veth Z- drives with contra-rotating propellers. These main thrusters are recessed, limiting the minimum operational draught to only 1.52m and allowing the vessel to cruise most European rivers where the water depths are often critical. In order to isolate vibrations from the propulsion units, a double hardwearing flexible mounting system has been applied. On both sides, the azimuthing thrusters are mounted on separated bottom sections, which are resiliently integrated in a frame of the actual ship’s bottom. Furthermore, the main engines are mounted on double vibration dampers and paired to the thruster units through flexible couplings. To lower the impact of propeller blade impulses to the hull, an air curtain buffer was installed - by blowing air in between the propeller and hull, the pressure pulses are not transmitted to the hull. 8

MARINE ENGINES MTU 4000 ENGINE PRODUCTION BEGINS IN CHINA MTU Yuchai Power, a joint venture set up between Rolls-Royce Power Systems and the Chinese diesel engine manufacturer Guangxi Yuchai Machinery Company, is preparing for the start of series production of MTU Series 4000 engines. Last week, in the presence of over 100 guests, Yan Ping, Chairman of Guangxi Yuchai Machinery Company, together with Andreas Schell, President of the Rolls-Royce Power Systems business unit, unveiled the first MTU Series 4000 engine manufactured in Yulin. Preparations for the completion of the assembly lines for highvolume series production are in full swing, with the large test bench required for engines with power outputs of up to 3500kW and as many as 20 cylinders currently being calibrated. Ever since the joint venture received all the necessary regulatory approvals in 2017, preparations for the start of production have been in full swing – modifications to an existing production building in Yulin in southern China have been completed, production facilities installed and logistics and quality processes agreed on. Members of the workforce from Yuchai with the required experience have completed training in MTU engine production in Friedrichshafen that will enable them to fulfil their future responsibilities. In future, they will manufacture MTU engines in Yulin in accordance with the same quality standards that apply in Germany and the USA. “With the MTU Series 4000 engine, we have precisely the kind of product the market in China requires,” said Schell. The constant increase in the demand for energy in China and the neighbouring countries, in addition to the strong demand for energy resources have created a market for power generation facilities and for the oil and gas industry. “The first engine manufactured in Yulin is an expression of the excellent working relationship and commitment of the joint teams. We are delighted that, in Guangxi Yuchai Machinery Company, we have found a partner that meets our needs precisely,” he added. Yan Ping said: “We much value the partnership that is aligned with our group strategy of growing international competitiveness. We are committed to delivering optimal quality products for a growing customer base in the Chinese and international markets and looking forward to bringing our partnership to the next level. The components needed to produce the engines at MTU Yuchai Power will initially come from Germany. Suppliers in China capable of delivering parts of the same quality will gradually be added at a later stage. “We will accept no compromises in terms of quality and delivery reliability. It is a responsibility we have towards the MTU brand and our customers,” said Schell. 9