Sea Technology

NOV 2013

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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ners from a dozen entries of recently introduced marine electronics products, based on innovation, beneft to boaters, practicality and value. Wärtsilä 20DF Engine Now in US Market Wärtsilä Corp. (Helsinki, Finland) has released its 20DF dual-fuel engine for sale in the U.S. market. The engine meets the strict emissions compliance criteria of the United States Environmental Protection Agency (EPA) Tier 4. This release to the U.S. market is in response to the growing demand for natural gas-fueled engines. Wärtsilä's dual-fuel (DF) technology allows engines to use either natural gas or diesel oil. The Wärtsilä 20DF is a commercial-duty, medium-speed, dual-fuel engine. Engines supplied to the U.S. market will operate primarily on natural gas, with marine diesel oil as a pilot fuel or as an emergency backup fuel. The 20DF's power spans the range from 1,056 to 1,584 kilowatts per engine. Wärtsilä's lean-burn, low-pressure, dual-fuel engine technology utilizes a very low percentage diesel fuel as a pilot ignition source, amounting to about 60 st / November 2013 1 percent of total energy. According to the company, this technology is attracting the attention of global feet owners operating within the North American Emissions Control Area (ECA), for which regulations came into force in August 2012. The legislation is aimed at achieving stricter control on emissions of sulphur oxides, nitrogen oxides and particulate matter from vessels. ECAs have also been established in the Baltic Sea and North Sea. India Invests in New Research Vessel India's government will invest in a new scientifc research platform vessel to be built by Bharati Shipyard, based in Mumbai, India. This indicates that India's technology sector continues to grow. The Class XII merchant vessel will host scientists from various Indian government scientifc laboratories. It will be used to carry out multipurpose research along the coastal seabelt of India. Bharati has chosen GE Power Conversion (Paris, France) to supply the power and propulsion system for the ship. This will be the frst diesel-elec- tric ship built in India to incorporate medium-voltage equipment. Delivery of the vessel is expected in 2015. Bharati has signed two contracts with GE Power Conversion for the current project. The main one is with GE Power Conversion in France for design, production and supply of the power and propulsion equipment (generators, motors and drives). The supplementary contract is with GE Power Conversion in India, which will be responsible for technical services, design, documentation, installation checks, commissioning and sea trials. The medium-voltage propulsion system is rated at 3.3 kilovolts, with two propulsion motors of 5 megawatts. Each motor is ftted with one of GE's MV7000 drives. MV7000 drive technology can be applied to a wide range of equipment. The drives can feed both induction and synchronous machines with highperformance vector control across all speed ranges. GE has been working on this project for two years. Overall, the company sees good prospects for power and propulsion systems in the marine industry in India. n

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