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PROPULSION FIRST AZIPOD D FOR TUG ABB has revealed that an 8000kW rescue tug, the first vessel installed with its Azipod D electric propulsion system, has been delivered to customer Guangzhou Salvage Bureau, a division of the Chinese Ministry of Transport. The vessel was built by Huangpu Wenchong Shipyard. Before delivery, the rescue tug was tested in sea trials where it exceeded design targets in bollard pull, fuel economy, manoeuvrability, and low-load performance. The Azipod D, available across a power range from 1.5 MW to 7.5 MW, incorporates ground-breaking thruster technology enabling installed power savings of up to 25%, less maintenance and significantly reduced fuel consumption and emissions. Unique advantages make the design suitable for a wide range of vessel types. Captain Shaohua Liu of the rescue tug, said: “We are really impressed with the vessel’s performance. Response time and manoeuvrability, both of which are critical in our operations, are excellent. Less power was required than we expected for a given function. The Azipod D has exceeded our expectations by far.” Jaakko Aho, Vice President Thruster Products, ABB Marine & Ports, said: “The Azipod D range demonstrates our continuing drive to raise efficiency and cut lifetime running costs. More can now be achieved with less, and the scalable Azipod D is suitable for an even broader range of applications compared with earlier units.” Referring to the product range itself, he commented: “With proven reliability, lower installed power requirements, economic efficiency and reduced maintenance requirements, we are confident of outperforming our peers and strengthening our position as the supplier of choice for high-end thrusters.” TILTED STEERABLE THRUSTER INTRODUCED Wärtsilä has launched the WST-24R. A thruster which the manufacturer claims is the maritime industry's first tilted steerable thruster with combined electric retraction and steering. One of the most notable features of the WST-24R is the gearbox, which has an eight-degree tilted propeller shaft configuration. This is said to reduce thruster/hull interactional losses, thereby producing up to 20% more effective thrust than conventional non-tilted thrusters and enabling lower fuel consumption. This extra effective thrust directly contributes to the advanced DP capability of a vessel. Replacing the existing LMT 1510, the WST-24R thruster offers more than 10% added unit thrust as a result of the reduced power density. This, combined with improved hydrodynamics and the dedicated Wärtsilä Thruster Nozzle design, reduces the environmental impact of the propulsion system. It can also be delivered to comply with clean notations and is optionally compatible with the US EPA's VGP2013 stipulations. With fewer components, the thruster has been designed to reduce maintenance, while the combined steering-retraction seals, designed to have no oil to water interface to reduce environmental risk, can be replaced from inboard. The steering is electric, rather than hydraulic, further enhancing the capabilities of the system, and the new retraction system is lightweight and safe with self-locking electric actuation. Wärtsilä is marketing the WST-24R for application to shuttle tankers and offshore support and construction vessels. "This latest addition to our thruster offering increases operational efficiency for owners and operators, while the pre-aligned plug and play installation eases shipyard time and costs. There are other retractable thrusters of this size on the market, but the Wärtsilä WST-24R is the only one with the tilted configuration advantage," said Michel van Veluw, Director Thrusters & Propulsion Controls, Wärtsilä Marine Solutions. 4
WÄRTSILÄ AND MHI LOOK TO NEW PROPULSION SOLUTIONS Wärtsilä and Mitsubishi Heavy Industries Marine Machinery & Equipment (MHI-MME) have signed a Memorandum of Understanding (MOU) to market a new energy solution capable of producing greater power generation capacity for marine vessels. By integrating MHI-MME's waste heat recovery system and energy saving power generation system (WHRS) with Wärtsilä's operational control technology for shaft generator systems, the new solution results in more energy efficient ship navigation and an improved Energy Efficiency Design Index (EEDI). A notable innovation is the combining of a power take off/take in (PTO/PTI) shaft generator system with the WHRS to improve the stability of the WHRS. Depending on the load of the main engine and the ship's network, the WHRS sometimes produces electrical energy in excess of that needed by the network. Such energy can be utilised via the PTO/PTI generator and at full load, the surplus energy can be used to assist the ship's drive by being applied directly to the propeller shaft. At low main engine load, the WHRS can be operated in parallel with a diesel generator set. Parallel operation with a shaft generator via PTO operation is also easily implemented. The patented design connects the WHRS generator into the DC link circuit of the PTO/PTI shaft generator rather than directly into the mains. This allows operation of the WHRS at reduced speed to create higher efficiency of the turbine system at part load. In so doing, it avoids the necessity of speed regulation valves, which cause throttle or bypass losses. "When two technology leaders combine their fields of expertise, as is the case here, a solution can be created that raises efficiency to a new level. This will produce obvious benefits for ship owners and operators, and we are proud to be cooperating with Mitsubishi in this exciting development," said Peter Rogers, Director, Power Conversion, Wärtsilä Marine Solutions. Tomoo Kuzu, Executive Vice President, MHI-MME, said: "We are moving forward various energy-saving technologies and can expand our portfolio with this new solution, which we are quite convinced will satisfy present market demands for increasing environmental awareness. We wish to thank Wärtsilä for its highquality collaboration that has made it possible.” MARINE ENGINEERS MESSENGER SHIP TECHNOLOGY NEWS TO 8544 DECISION MAKERS EVERY TWO WEEKS Click here for more information about our favourable advertising rates or email: mem@seabornecomms.com 5
Page 1: MEM MEM MARINE ENGINEERS MESSENGER
Page 6 and 7: TURBOCHARGERS ABB ADDS SEQUENTIAL T
Page 8 and 9: MAN DUAL-FUEL ENGINES HIT 100,000 H
Page 10 and 11: Type Approved to IMO MEPC 227 (64)
Page 12 and 13: COMPAC water lubricated propeller s
Page 14 and 15: challenges,” adds George Gill, Pr
Page 16 and 17: STORAGE & CONTAINMENT GAS FUEL SYST
Page 18 and 19: EMISSIONS WARTSILA CUTS VOCS WITH N
Page 20 and 21: HIGH POINT FOR HYTUG A ground-break
Page 22 and 23: The test-beds in Trondheim and Hort
Page 24 and 25: measures, promote the uptake of low
Page 26: With the new guideline, DNV GL has

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