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 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]
Mitsubishi Heavy Industries (MHI) signed on the dotted line a few days ago to build a 138,000 gt LNG carrier in their ‘Sayaendo’ series for Mitsui O.S.K. Lines . MHI describe this 288m (945ft) long vessel as a ‘New-generation’ LNG carrier, with a multitude of new design features which add up, MHI claims, to deliver a 25% reduction in fuel consumption compared to that of conventional LNG carriers of the same size; but essentially the design is marked by two outstanding features. The first a dramatic change in the shape of the ship compared with the distinctive dromedary-like silhouette of other LNG carriers. Second a new turbine plant that achieves higher thermal energy by steam reheat.
MHI 'Sayaendo' LNG Carrier: Image courtesy of MHI
LNG Tanks – 'Peas in a Pod' StyleThe name itself explains the concept: ‘Sayaendo’ in Japanese means ‘peas in a pod’. The ‘peas’ are the spherical LNG tanks, the ‘pod&r... [More]
Carnival Corporation’s German subsidiary AIDA Cruises has two 125,00 GT passenger ships each with a capacity of 3,250 passengers is presently under construction at MHI, Japan, with completion dates scheduled for the second quarter 2015 and second quarter 2016. They will use the Mitsubishi Air Lubrication System (MALS) whereby blowers bleed air bubbles through small holes in the ship’s bottom to produce a carpet of air which reduces friction. In this first application on a cruise ship, MHI predict a fuel saving of around sever per cent for the two AIDA vessels. The AIDA cruise ships will use a diesel electric propulsion system driving two ABB Azipod XO2100 azimuth thrusters each with a rated output of 14 MW. [More]