VLCC order for ultra-long-stroke engine

23 Sep 2011

According to MAN Diesel & Turbo, Athens-based ship management company Almi Tankers will be the first to equip two VLCCs with the new 7G80ME-C9.2 engine. The engines will be built by Hyundai Heavy Industries.

The ships are, likewise, being built in South Korea, by DSME, and are scheduled for delivery in May and December 2013. The engines will start factory tests in January 2013. MAN Diesel & Turbo states that it is currently involved in several other VLCC projects where the G80ME-C9.2 is the preferred engine choice, VLCC propulsion having been the original target market for the G80ME. With current discussion about reducing lay-out speeds of VLCCs to 13 knots from the existing 15 to 15.5 knots, MAN believes the G80 range will attract still further interest.

Ole Grøne, senior vice-president low speed promotion & sales said: “Traditionally, super long stroke S-type engines, with relatively low engine speeds, have been applied as prime movers in tankers. Following the efficiency optimisation trends in the market, the possibility of using even larger propellers has been thoroughly evaluated with a view to using engines with even lower speeds for propulsion of particularly VLCCs”.

He continued: “VLCCs may be compatible with propellers with larger propeller diameters than the current designs, and thus high efficiencies following an adaptation of the aft hull design to accommodate the larger propeller. The new ultra long stroke G80ME-C9.2 engine type meets this trend in the VLCC market. It is estimated that such new designs offer potential fuel-consumption savings of some 4-7%, and a similar reduction in CO2 emissions. Simultaneously, the engine itself can achieve a high thermal efficiency using the latest engine process parameters and design features.”

Earlier this year Greek owner Thenamaris placed an order for four 6G80ME-C9.2 engines to power four 5,000TEU container vessels, to be built by Hyundai in South Korea. The G-type programme was introduced to the market in October 2010 with the G80ME-C9 model. MAN Diesel & Turbo subsequently expanded the ultra-long-stroke programme in May 2011 with the addition of G70ME-C9, G60ME-C9 and G50ME-B9 models. The G-types have designs that follow the principles of the large-bore Mk9 engine series that MAN Diesel & Turbo introduced in 2006. Their longer stroke reduces engine speed, which the company says paves the way for ship designs with unprecedented efficiency.

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