The first ME-B engine, a 6S40ME-B, was built in December 2007 by STX Heavy Industries Co. Ltd. at its Changwon works in Korea.The 6S40ME-B delivers 6810 kW at 146 r/min with an MEP of 21 bar and, on account of its performance, MAN Diesel decided to extend the ME-B concept to the S46 and S60 segments. With the launch of the new engines, the entire ME-B program now boasts a total output range from 4350 to 19 040 kW.
MAN Diesel made a strategic decision aligned with the importance of environmentally friendly operating reciprocating engines. In early June, the company relaunched its engine portfolio with the aim of making all its engines compatible with the limits established by the International Maritime Organization (IMO) in its Tier 2 regulations.
“This relaunch is a historic milestone for the company, and one which preempts the January 2011 implementation of the new IMO NOx emission limits by some time,” said Thomas Knudsen, senior vice president and head of Marine Low-speed, MAN Diesel. “We launched the new program at a meeting with MAN Diesel licensees in Okayama, Japan, with participants from the two- and four-stroke licensee family in China, Japan, Korea and Vietnam.”
At the meeting the new implications for MAN Diesel’s product portfolio were on the agenda. Technological challenges with the main focus on environmental challenges, such as cutting emissions and the application of biofuels, were discussed in detail. In total, around 45 engines will be concerned. A few units will be obsolete in the process and two units mentioned by Knudsen are the K108 and K90MC.
“During this summit, we have updated our Asian family of licensees on the latest developments with particular emphasis on environmental issues and given our view on diesel technology in this regard today and in the future,” commented Peter Sunn Pedersen, executive vice president of MAN Diesel. “What we are doing is a complete optimization of the engine installation, whether electronically or mechanically controlled.”
Locating the venue in Asia is an expression of how important this market is to MAN Diesel, with many newbuild orders currently placed at Asian yards, many of which are due for delivery in the wake of Tier 2 implementation. “You can divide the changes into two groups. With the electronically controlled engines we have focused on advanced rate shaping, a unique feature of our ME system of the injection process, while on the conventional disengine types we have adjusted combustion through design,” said Knudsen. “This means a number of things. We will improve the atomization by using a new type of atomizer. Then the turbocharger and air cooler specifications will be changed and a delayed closing of the exhaust valve will also help with improving the environmental performance.”
The improved emission performance will mean a smaller fuel oil consumption penalty. “Having addressed Tier 2, MAN Diesel will next turn its focus to the Tier 3 regulations, successor to Tier 2, and due to come into force in a decade,” said Knudsen. “We know what needs to be done, but we still have development to do to reach our goals.”
Recently MAN Diesel has enhanced its electronic, low-speed, ME-B engine program with the launch of the MAN B&W S46- and S60ME-B type engines adding to the existing MAN B&W S35ME-B and S40ME-B engines and the S50ME-B that was introduced in early 2007. The ME-B design utilizes a camshaft-operated exhaust valve and an electronically controlled fuel injection system, making it well equipped to meet the new Tier 2 emission requirements.
Also recently, A.P. Moller-Maersk has ordered 18 MAN B&W 6S80ME-C9 engines for a series of containerships. The 6S80ME-C9 engine type is MAN Diesel’s most modern mark-9 design and is also fully compliant with the new Tier 2 emission requirements. All of the 18 engines will be built by HHI-EMD, Hyundai’s engine division, with 13 going to Hyundai’s Ship Building Division (HHI-SBD), and the remaining five to Hyundai Samho Heavy Industries (HSHI). The two yards will deliver the 4500-TEU container ships to A.P. Moller – Maersk during 2011-2012. A sign that it did not take long for the new MAN Diesel policy to be brought into action.