MHI-MME sees ‘strong demand’ for turbochargers for EGR-equipped two-strokes, reveals a Riviera news source.
Orders for 30 turbochargers for two-stroke engines
Japanese turbocharger manufacturer secures orders for 30 turbochargers for two-stroke engines with low-pressure EGR systems, with at least another 30 in the pipeline.
Mitsubishi Heavy Industries Marine Machinery & Equipment (MHI-MME) says it is receiving “strong demand” for its MET turbochargers for two-stroke marine diesels, equipped with low-pressure exhaust gas recirculation (EGR) systems.
In April, MHI-MME reported supplying its first MET53MB turbocharger for a J-ENG 6UEC50LSH-Eco-C3 prime mover, equipped with a low-pressure EGR system to comply with IMO Tier III NOx regulations.
The technology enables the use of low-pressure exhaust gas from the turbocharger outlet to reduce NOx emissions, while minimising the impact on fuel economy.
J-ENG’s two-stroke diesel is optimised using a full electronic control system for exhaust valve drive and fuel injection, reducing its fuel consumption compared to the previous generation UEC50LSH-Eco-C2. This improved performance helps contribute to reducing CO2 emissions and achieving Energy Efficiency Design Index (EEDI) phase 3. The power range of the J-ENG 6UEC50LSH-Eco-C3 is the same as UEC50LSH-Eco-C2, suitable for supramax and handysize bulk carriers, MR tankers, chemical tankers and feeder container vessels.
MHI-MME has been co-operating with J-ENG
MHI-MME has been co-operating with J-ENG in developing turbochargers for main engines equipped with low-pressure EGR systems.
Since shipping its first unit in 2018, MHI-MME has delivered 30 turbochargers for engines with low-pressure EGR. Besides its MET53MB, the Japanese turbocharger manufacturer has shipped four other series types: 37MB; 42MB; 48MB; and 60MB. The smallest of these, MET37MB, covers a power range of 3,800 to 6,300 kW, while the largest, MET60MB, covers 9,300 to 15,500 kW.
The MET-MB series is applicable to two-stroke engines from MAN Energy Solutions, WinGD and J-ENG, and business is picking up for the units.
“We have also already received indications for over 30 additional orders and expect the business volume to further increase,” said MHI-MME in a press statement, adding, “As a manufacturer of turbochargers that focuses on the needs of customers, we will continue to provide the best products that meet various engine specifications and are compatible with new fuels.”
In the upper power range of the series, an MET60MB was combined with an MET90MB, MHI-MME’s largest turbocharger, in a sequential turbocharging application for the two-stroke main engine of a 15,000-TEU container ship in 2022.
MHI-MME reported completing trials
MHI-MME reported completing trials in July on the MET90MB in combination with an MET60MB on a two-stroke MAN Energy Solutions’ 8G95ME C10.5 EGRBP. At the time, 22 MET90MB turbos had been ordered for installation on the main engines of an equal number of 15,000-TEU container ships, including 10 container ships of the same series.
Sequential turbocharging combines the use of two installed turbochargers for improved efficiency. By using a large turbocharger, like the MET90MB, the number of turbochargers required for the application can be reduced from three units to two, enabling both a high degree of efficiency and lower maintenance costs. The MET90MB covers an engine output range of 22,900 to 37,900 kW per unit.
Sequential turbocharging concentrates the exhaust gas to one of the turbochargers at lower engine speeds when the amount of exhaust gas is small. When there is a large amount of exhaust gas, the gas is directed to either both turbochargers, or just the larger unit for efficient turbocharging at a broader range of engine speeds.
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Source: Riviera
