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    MAN B&W ‘low NOx’ power for DOF's MT6009

    Equipment & Technology // June 13, 2006

    MAN B&W Diesel in Denmark has added another interesting contract to the recent series of new offshore references.

    The contract takes the form of a power package of four MAN B&W Holeby GenSets which have been been specified for District Offshore's (DOF's) newbuilding from Fitjar Mekaniske Verksted, Norway.

    The vessel will be the first MAN B&W diesel-electric powered PSV, based on the L21/31 engine series.

    The 74m PSV, derived from a MT-6009 design and engineering package by Marin Teknikk AS, Norway, will be optimised for DOF’s operational offshore service in the North Sea.

    The newbuilding is expected to be taken over by DOF during spring 2007. After delivery DOF will place the vessel on a long time charter with Shell UK.

    The gensets, which are scheduled to be supplied to the yard during January 2007, will be delivered with an engine execution specially optimised for very low NOx exhaust gas emission values.

    The 2 x six cylinder and 2 x seven cylinder MAN B&W Holeby gensets, developing a total of 4,940kWe, will be certified to a NOx emission level of 8.0 g/kWh without any after treatment of the exhaust gas.

    This emission level is obtained with the latest (engine internal) optimisation of the MAN B&W TCR turbocharger, the valve timing and a new piston crown design – without any increase of the L21/31 engines’ low fuel oil consumption.


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