A new dual-fuel marine diesel engine variant from MAN Diesel & Turbo, the ME-LGI, runs on liquid gas fuels – methanol, LPG, dimethyl ether (DME), and (bio-) ethanol as well as other, low-flash-point fuels – building on the manufacturer’s successful LNG /HFO dual-fuel ME-GI low speed engine plant introduced last year. MAN developed the ME-LGI engine in response to interest from the shipping world in using alternatives to heavy fuel oil. Methanol and LPG carriers have already operated at sea for many years and many more LPG tankers are currently being built as the global LPG infrastructure grows; in themselves a ready market once a suitable dual-fuel engine became available.Sure enough, the new engine, unveiled on 1, July 2013 was snapped up as MAN signed a Letter of Intent with Vancouver-based Waterfront Shipping for the installation of four MAN ME-LGI engines which will run on a blend of 95% methanol and 5% diesel fuel.
Chemical Carrier Tankship: Photo... [More]
Cavitation noise reduction – underwater noise has a deleterious effect on sensitive seismic data streams – was the target for MAN Diesel & Turbo designers when they set about the task of creating a power and propulsion package for a new GC Reiber Shipping seismic survey vessel. This object they ingeniously achieved and were rewarded with a contract (option for a second vessel) to supply four MAN 8L32/44CR B.2 engines to power proprietary propulsion machinery.The vessel design is an ST 324 XT from Skipsteknisk of Aalesund, Norway whose hull will be constructed in Poland with outfitting subsequently to be carried out at the Myklebust shipyard north of Aalesund. The propulsion plant is scheduled for delivery by May 2014 with vessel delivery following in March 2015.
Graphical rendering of the new seismic vessel: Image courtesy Skipsteknisk
Power and gearing arrangementsFour of the 4-stroke 8L32/44CR B.2 common-rail engines (delivering 600 kW/cylinder) along with 2 &ti... [More]
One hundred years ago, MV Selandia displacing 7,000 t, entered service in 1912 and was the lead class of five ships with the other four sister ships built at various shipyards in Europe. They all had twin Burmeister & Wain four stroke crosshead engines type DM 8150-X giving a service speed of 11 kn. On the Selandia’s acceptance trials she reached a speed of 12.2 kn. The engine was an in-line eight cylinder with bore of 530 mm and stroke of 730 mm and the bmep of 6.4 bar produced 920 kW at 140 rpm. There were two 186 kW auxiliary diesel engines each with four cylinders. Each was driving a 220 V DC generator providing on board electrical power. Electric motors were used to start the main engines by turning the 6.5 ft (2 m) diameter flywheels. [More]
Tags: Burmeister & Wain, MAN Diesel & Turbo, Selandia, Dr Rudolph Diesel, Sulzer, Doxford, Junkers, MAN, Werkspoor, Krupp, DM 8150-X
MAN Diesel & Turbo together with Germanischer Lloyd have published a study analyzing the problem of the best way for container ships to meet the present and future exhaust emission regulations. The four technologies investigated in the study are: exhaust gas cleaning by scrubber, scrubber plus Waste Heat Recovery (WHR), LNG as a fuel and LNG with WHR. In the study, circumstances were considered for five sizes of container ship. The smallest is a feeder of 2,500 TEU going up to the largest of 18,000 TEU. For each ship size the speed, engine power, round trip distance and percentage of distance spent in Emission Control Areas is estimated proportionally. The study concludes that LNG offers lower emissions and given the right circumstances, less fuel cost. [More]
MAN Diesel and Turbo said last week it will up-rate its popular four-stroke diesel GenSet L23/30H by almost 10% of current values (any more than that and the design would have to be submitted to classification societies for ‘Type Approval’ thus increasing costs and taking more time). Introducing the upgrade, MAN adds a footnote lauding this particular engine, the classic 23/30 model first introduced by subsidiary Holeby fifty or so years ago, as one of its ‘original workhorses’, mentioning too an increase in orders for the new version of this, the Mk.2 engine . On the understanding that a workhorse is something that does a large amount of dull or routine work faithfully — providing a ship’s electrical power seems to fit — then the title is well-earned by the GenSet. What made it so popular?
Genset Turbocharger Detail: Photo courtesy of MAN
Electricity Generator Workhorse in the MakingUnsurprisingly it was the saving ... [More]
An MAN Diesel L27/38 propulsion package is specified for the new Danish trawler Cattleya, scheduled for delivery by Karstensens Shipyard, Denmark, in October 2012 . The new ship has an LOA of 228 ft (69.6 m) and a gross tonnage of 1,750. The propulsion system is designed to provide a maximum speed of 16 kn and to have a bollard pull of 68 tons. A 9L27/38 diesel engine rated at 3MW at 800 rpm powers a 13.8 ft (4.2 m) diameter CP propeller running in a nozzle. The design of the propeller takes into account most importantly, the vessel’s predicted operational power/speed/duration profiles. In addition, there is a bow mounted, retractable, electric powered 800 kW azimuth thruster. [More]
Increasing efficiency of modern turbochargers means that there is a portion of unused exhaust energy available. MAN Diesel & TurboTurbo Compound System Power Turbine and Generator (TCS-PTG) makes use of that excess exhaust energy. The system diverts excess exhaust, up to 13 per cent of exhaust gas flow, from the exhaust gas receiver to a power turbine that is inserted parallel to the turbochargers. The turbo performance and main engine output is not affected by the use of the PTG which can extract up to five per cent of additional power with a maximum of 4,700 kW, depending on the size of the main engine. The power turbine drives a generator via a reduction gearbox that produces electrical energy at 50 or 60 Hz . MAN Diesel & Turbo recommend the TCS-PTG system for marine applications with main engines above 20 MW and where the electrical power requirement in more than ten per cent of main engine power. [More]
Canadian shipping company Seaspan announced earlier this month, the signing of a contract for seven 10.000 TEU container ships, with an option for another 18 vessels, to be built by the Yangzijiang Shipbuilding Group. This is the largest container vessel contract ever entered into in China. New features were developed by an international collaboration with Seaspan, the classification society DNV, MARIC and the shipyard group. Cargo capacity is increased by 10 per cent with an estimated fuel consumption reduction of 20 per cent. The ships are able to operate with a minimum amount of ballast water and emissions are reduced by approximately 20 per cent. [More]
Earlier this year, MAN Diesel & Turbo announced its plans for a program of ME-GI testing during 2011 at the company’s Diesel Research Centre in Copenhagen Denmark. The 4T50ME-X R&D research engine has been rebuilt as a 4T50ME-GI specification engine, to carry out ME-GI dual fuel testing on LPG (Liquid Petroleum Gas) and HDO.fuels. Operation on dual fuel requires the injection of both pilot fuel and gas fuel into the combustion chamber. Comparison of emission levels shows that there are benefits in the full range when using LPG as fuel: a 17 per cent reduction in CO2, 12 per cent reduction in NOx,, a 92 per cent reduction in SOx and a 37 per cent reduction in particulates. [More]
A testing programme with factory personnel commenced in January 20111 on a 6S46MC-C8 engine built by licensee Hitachi Zosen: the purpose was to commission the engine control system and optimize the integration of the SCR equipment. The engine develops about 7 MW at a speed of up to 129 rpm. The SCR removes NOx from the exhaust using urea as an activator. Further reduction of emissions in the exhaust system are achieved using Exhaust Gas Recirculation (EGR) techniques. On completion of the tests, MAN Diesel & Turbo claimed a world first as the engine met all emission requirements laid down in the IMO Tier 3 regulations effective 2016. [More]