The first G-type engine, designated G80ME-C, has a design that follows the principles of the large-bore Mk-9 engine series that MAN Diesel and Turbo introduced in 2006.
The G-type is designed with a longer stroke to reduce engine speed, thereby paving the way for ship designs with higher efficiency.
"MAN Diesel and Turbo always follows developments in the shipping market closely and we have kept a close eye on the trend for fuel optimisation in recent years," said Ole Grøne, Senior Vice President Low-Speed Sales and Promotions, MAN Diesel and Turbo.
"As such, we have experienced great interest in the G-type engine during extensive consultation with industry partners and are currently working on a variety of projects with shipyards and major shipping lines. As a result, we have reached the conclusion that the introduction of the G-type engine programme is both viable and timely."
Tankers and bulk carriers have traditionally used MAN B&W S-type engines with their long stroke and low engine speed as prime-movers, while larger container vessels have tended to use the shorter-stroke K-type with its higher engine speed.
Larger container vessels, in recent years, have also been specified with S80ME-C9 and S90ME-C8 engines because of the opportunity they offer to employ larger propeller diameters. Following efficiency optimisation trends in the market, MAN
Diesel and Turbo has also evaluated the possibility of using even larger MAN propellers and thereby engines with even lower speeds for the propulsion of tankers and bulk carriers.
Such vessels may be compatible with propellers with larger diameters than current designs, and facilitate higher efficiencies following adaptation of the aft-hull design to accommodate a larger propeller.
It is estimated that such new designs offer potential fuel-consumption savings of some four to seven percent, and a similar reduction in CO2 emissions.
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