New Low-Speed Engines
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New Low-Speed Engines


Wärtsilä Corporation has introduced two new low-speed marine diesel engines each of which will be available in two versions designed for different markets. The Wärtsilä RT-flex82C and RTA82C are intended for the propulsion of Panamax containerships with capacities up to 4500 TEU at a typical service speed of about 24 knots. The engines will be available with six to twelve cylinders to provide power range from 21,720 kW to 54,240 kW at 87 to 102 rpm. The Wärtsilä RT-flex82T and RTA82T are designed to provide the propulsion for large tankers, VLCCs and ULCCs of 200,000 tdw to more than 350,000 tdw. These engines will be built with six to nine cylinders to provide power range from 21,720 kW to 40,680 kW at 68 to 80 rpm.

The first engines of the new types are expected to be completed towards the end of 2007, in cooperation with Hyundai Heavy Industries. The separate 'C' and 'T' versions are designed in parallel using the platform concept. Their parameters are standardised as far as possible, except principally the piston stroke, of 2646 mm for the 'C' version and 3375 mm for the 'T'. As a result, many components can be same for both versions, allowing benefits of standardization in the design and manufacturing, lowering manufacturing costs, and minimizing spare parts stocks.

The engines incorporate the latest common-rail technology with full electronic control of fuel injection and exhaust valve operation. The RTA82C and RTA82T have traditional mechanically-driven camshafts with fuel injection pumps, exhaust valve actuator pumps, etc. Otherwise the RT-flex and RTA versions have the same principal characteristics and design features. The engines will meet the market needs in terms of high reliability, efficiency, compactness, and environmental requirements. They will be fully compliant with the NOX emission regulation of Annexe VI of MARPOL 1973/78 convention. The RT-flex versions have the added benefit of no visible smoke emissions at all operating speeds. The mechanical RTA versions will be available for those shipowners preferring the traditional concept.


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