Excellent Desulfurization Capacity with Efficient Use of Space, Suitable for Very Large Container Ships
YOKOHAMA, JAPAN - May 31, 2018
Mitsubishi Shipbuilding Co., Ltd.
Mitsubishi Hitachi Power Systems, Ltd.
Mitsubishi Shipbuilding Co., Ltd. (Mitsubishi Shipbuilding) and Mitsubishi Hitachi Power Systems, Ltd. (MHPS) have jointly launched the most advanced SOx abatement system, ACTIVE FUNNEL. It is a funnel which contains an optimally shaped exhaust gas scrubbing structure which reduces sulfur dioxide (SO2) in the exhaust gas of 3.5%-sulfur-content fuels to that of 0.1%-sulfur-content fuels, conforming with newly introduced SOx emissions regulations coming into effect globally as of January 1, 2020.
The new and reliable SOx abatement system was developed by combining MHPS' comprehensive exhaust gas treatment technologies cultivated through providing desulfurization systems for thermal power plants with Mitsubishi Shipbuilding's marine engineering expertise which has been developed through its long shipbuilding experience. MHPS' land-based flue gas desulfurization systems have the capacity to treat the equivalent of 7 to 20 times of the emissions from a large size marine diesel engine. The ACTIVE FUNNEL is most suitable for very large container ships with high exhaust gas emissions and limited installation space for SOx abatement systems. It can desulfurize large amounts of exhaust gas and its flexible design makes it possible to be installed even in narrow spaces between the container holds, while maintaining a vessel's container capacity. The ACTIVE FUNNEL is also suitable for installation on existing ships since it is provided as one module and has a short retrofitting period.
The ACTIVE FUNNEL which is applicable to both open-loop systems and hybrid systems(Note1) provides a traditional funnel with advanced SOx removal function.
Going forward, the product lineup will be expanded by applying the new ACTIVE FUNNEL technology to very large crude carriers (VLCC: 200,000-310,000 DWT(Note2)) and very large ore carriers (VLOC).
When new SOx emissions regulations come into effect, the ACTIVE FUNNEL is expected to contribute to the further development of environmentally-friendly and economic global marine transportation.
(1) In an open-loop system, seawater intake is sprayed directly on the exhaust gas and then discharged from the ship. In a closed-loop system, the exhaust gas is scrubbed using circulating water, after which the circulating water is neutralized for reuse. In a hybrid system, it is possible to switch between the open and closed systems.
(2) DWT = dead weight tonnage
"ACTIVE FUNNEL" for Very Large Container Ships. Image by Mitsubishi Heavy Industries, Ltd.
Comparison Image of SOx abatement system . Image by Mitsubishi Heavy Industries, Ltd.
The Diamond Gas Orchid features LOA (length overall) of 293.5m, width of 48.94m, depth of 27.0m, and draft of 11.05m. Deadweight capacity is approximately 73,800 tons, and the total holding capacity of the tanks is 165,000m3. Launching took place in March 2017. Construction was performed by Mitsubishi Heavy Industries Marine Structure Co., Ltd., a Nagasaki-based MHI Group company.
The Sayaringo STaGE succeeds the "Sayaendo," a vessel highly acclaimed for its improved Moss-type spherical tanks that deliver a high level of reliability. The adoption of apple-shaped tanks in the new Sayaringo STaGE offering has enabled an increase in LNG carrying capacity without changing the ship's beam, while incorporation of a hybrid propulsion system has significantly boosted fuel efficiency compared to the Sayaendo.
STaGE, an acronym deriving from "Steam Turbine and Gas Engines," is a hybrid propulsion system combining a steam turbine and engines that can be fired by gas. Efficient use of the engines' waste heat in the steam turbine results in substantial improvement in plant efficiency, enabling high-efficiency navigation throughout a full range of speeds.
Mitsubishi Shipbuilding and Mitsubishi Heavy Industries Marine Structure will continue to deliver solutions that enable a stable energy supply and environmental benefits by constructing next-generation LNG carriers with superlative transport capacity, fuel efficiency and environmental performance.
Mitsubishi Heavy Industries, Ltd. press release