World’s largest turbocharger completes shop trials

The MET90MB turbocharger series, which completed the shop trial in July, was delivered by MHI-MME’s plant in January 2022.

Twenty-two MET90MB turbos have 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, which combines the use of two installed turbochargers (one MET90MB unit and one MET60MB unit in this case) for improved efficiency, was adopted for the main engine, an MAN Energy Solutions’ 8G95ME C10.5 EGRBP, which was used in the shop trial.

By using a large turbocharger like the MET90MB, the number of turbochargers required for the application can be reduced from three units to two units, enabling both a high degree of efficiency and lower maintenance costs.

MET turbochargers have already achieved the global top share in terms of the number of turbochargers installed on the main engines of ultra-large container ships (11,000 TEU or greater).

To address the growth in engine output required to power ever-larger container ships, MHI-MME decided to include the larger MET90MB in its MET-MB series lineup.

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 to the larger unit for efficient turbocharging at a broader range of engine speeds.