Hybrid Turbocharger

By Keith Henderson at July 26, 2011 07:07
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Last year Mitsubishi Heavy Industries announced their development of a new type of hybrid marine turbocharger for generating electricity with exhaust gas from the main engine. The development of the hybrid turbocharger designated MET83MAG commenced in 2008 and following successful trials concluded in May 2010, a production model was prepared for installation in Oct 2010 on board the MV Shin Koho. The technology was jointly developed by four companies: NYK, the Monohakobi Technology Institute (MTI), the Universal Shipbuilding Corporation, and Mitsubishi Heavy Industries, Ltd.

Caption: Cutaway drawing of theMET83MAG turbocharger. The generator is housed within the air intake silencer and connected to the turbocharger rotor shaft.
Image credit: Mitsubishi Heavy Industries Ltd.

The output power of the three-phase AC generator is up to 750 kW at 9,500 rpm, due to the fluctuation in output the electrical power is first rectified to DC, then converted to the
appropriate voltage and frequency for shipboard consumption. Using a hybrid turbocharger instead of a diesel generator(s), the hybrid turbocharger contributes to a further reduction of CO2 emissions.

A further benefit of the hybrid turbocharger is that the generator can act as a motor and using the turbo’s compressor stage, provide a blower function in place of an auxiliary blower for slow speed operation of the two stroke propulsion engine.

Launched in Feb of this year, the MV Shin Koho is a 180,000 dwt bulk carrier of LOA 958 ft (292 m), beam 148 ft (45 m) and draft 80.3 ft (24.5 m). She is the world’s first carrier to be equipped with a hybrid turbocharger. Powered by a single MAN B&W 7S65ME-C diesel engine of 22,225 hp (16,580 kW) at 90 rpm the top speed is 17 kn. Her present duties will be transporting iron ore from Australia.

Caption: NYK Lines’ new 180,000dwt bulk carrier, MV Shin Koho, built at the Tsu Shipyard of the UniversalShipbuilding Corporation, Japan
Image credit: NYK Line

Comments (3) -

This is the gr8 example of technology risement. but, should overcome fore fluctuation in frequiency.

Parthasarathi |     7/26/2011 11:07:55 PM #

It is amazing what one can do , all this on just exaust gasses + economiser will reduse consumption of say 3mt.per day.
My cocern is violent pichig and surging on turbocharger while in a bit bad weather ,vessel empty , loaded , condition of bearngs  lub oil and it parts as lub oil pump , quality of lubricatin oil. No doubht they have think of those before installation. Then there is additional things to care about as rectifier to dc then adaptor to ac , the unit will reduce number of diesel oil generators?

bakocevic ljubomir |     7/27/2011 12:58:47 AM #

Old news, few already try it, some used motor/generator hybrid to assist spool when needed and generate power at other times.
Problem with those systems is that turbine spins at very high RPM generating low current but high voltages. One needs specialized electronics to make use of this wide output variations.


DSL1 |     7/31/2011 8:01:59 AM #

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