Marine Diesel Test Engine Up & Running at MHI’s Nagasaki R&D Centre

By George Backwell at March 30, 2013 04:26
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One of the world’s largest four-cylinder two-stroke marine diesel test engines (the electronically-controlled 4UE-X3 with a bore diameter of 60 cm) has been installed and brought up to speed at MHI, Mitsubishi Heavy Industries’ Nagasaki Research & Development Centre, where it thumps away producing data the Japanese marine engine manufacture needs to keep up with the leaders in a highly competitive business. MHI claims it is the only licensor among the top three in the world to carry out all of its own engine development, design and manufacturing. Marine Diesel Engine Test Plant MHI 4UE-X3: Photo courtesy of MHI Test Engine Features Main body structure: The main body (bed plate and column) uses a high rigidity, light-weight and simple single wall structure for simplicity of manufacture. The structure and thickness of the wall is optimized through FEM analysis using 3D modeling, etc. Combustion chambers: Bore cooled, high top land pistons are used to deal with the high h... [More]

Air Lubrication System Now a Proof Positive Fuel Saver

By George Backwell at July 14, 2012 04:50
Filed Under: General
Air-lubrication of a ship’s hull really does pay off with significant fuel savings. Just a few days ago NYK Line announced that trials of the Mitsubishi Air Lubrication System (MALS)  in not one, but two of its module carriers in a variety of normal operating conditions over a two-year period had been completed and confirmed an average 6% reduction in fuel consumption. Long Term Operational Trial An air-lubrication system was installed in each of twin-designed NYK-Hinode Line ocean-going vessels, the 19,800 dwt diesel-engined heavy equipment carriers ‘Yamatai’ and ‘Yamato’; the first in March 2010, and the other in the following November. MV Yamatai: Photo credit NYK Line These two ships are special heavy load carriers with roll-on, roll-off rampways for the transport of large prefabricated structures. Their propulsion system is by twin shaft CPP propellors, powered by a pair of Daihatsu 6DKM36 diesel engines, maximum rating 3.218 KW at 600/196 ... [More]

Saving Energy with Dutch Air-bubble Lubrication System 'ACES'

By George Backwell at May 15, 2011 04:38
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Energy saving, fuel economy of 15%, by reducing frictional drag on the immersed hull by means of injected streams of air bubbles has been proven effective by recently concluded practical tests. Two years of trials of a technology known as ‘Air Chamber Energy Saving’ (ACES) installed in a working Dutch inland waterway tanker back up this claim. ACES Damen Shipyards in Holland commissioned the exercise in the Dutch inland waterway tanker Till Deymann provided by subsidiary company Bodewes Binnenvaart back in 2009 on the heels of detailed analysis of tank-testing and computer modelling (at the Dutch Institute MARIN in Wageningen and DST laboratories in Duisberg, Germany), that indicated the time was right for putting ACES to the test under operational conditions. Till Deymann, chosen for conversion in order to test out the ACES system, was a standard 'River Liner' type 11.45e product from the Damen yard, of 2858 dwt, with a LOA of 110 m, moulded breadth of 11.45 m, and a d... [More]

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