The L21/31 is the completion of the new engine programme of the smaller medium speed engines from MAN B&WDiesel. The output of the L21/31 engine is placed between the L16/24 and the L27/38 engines. The L21/31 engine is available for marine applications (propulsion, GenSet and diesel-electric) and for power plant applications. The L21/31 engine has a bore diameter of 210 mm and a stroke of 310 mm. The engine is available for 900 rpm (60 Hz) and 1000 rpm (50 Hz) with cylinder outputs of 190 kW to 215 kW. As the latest engine of the new generation, the L21/31 engine uses the proven design concept of the L16/24 and L27/38 engines and an array of adapted components which meet the specific requirements of GenSet and propulsion service in that output range. Today's product development processes have to comply with a complexity of requirements like precise product tender specifications based on understanding of market demands, utilization of superior materials, tools and technologies, optimal product supply chain, management of relations with suppliers, environmental and economical aspects, and short time to market. To meet all these requirements a special simultaneous development process was applied and modern tools as the 3D design system Pro/Engineer and data processing for R&D and production were applied. This paper presents the main aspects and benefits from the simultaneous engineering process. The results of that process are presented as a description of chosen engine key systems and components, and a discussion of their layout in relation to fulfilment of the above requirements. The experience with the L21/31 engine as prototype on the test bench and during field tests is presented. The prototype engine has accumulated more than 10000 hours in operation, and the service experience proved that the development targets have been met.
The new MAN B&W L21/31 engine - Design, development and experience
Der neue mittelschnelllaufende Dieselmotor L21/31 von MAN B&W: Konstruktion, Entwicklung und Betriebserfahrungen
2004
15 Seiten, 31 Bilder, 2 Tabellen, 2 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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