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  • 2018 October 24 08:27

    MAN Energy Solutions launches its new EGR electrical turbo blower at a ceremony in Shanghai

    MAN Energy Solutions has launched its new EGR (Exhaust Gas Recirculation) electrical turbo blower – designated ETB40 – at a ceremony in Shanghai attended by some 120 industry guests and hosted by its two-stroke licensee, CSSC-MES Diesel Co. Ltd. (CMD). Simultaneously, CMD announced that it has placed the first order for the new blower in connection with the construction of several MAN B&W two-stroke 7G60ME-C9.5 main engines for newbuilding vessels.

    Individual ETB40 units will be installed aboard each vessel as part of their main-engines’ integrated EGR system. The order also represents the first time that CMD has employed EGR technology for compliance with IMO Tier III regulations, having previously commissioned several successful SCR (Selective Catalytic Reduction) applications.

    About the MAN ETB

    Specifically designed for EGR systems, the MAN ETB’s active control plays an important role in enabling these systems to reach IMO Tier III emission standards. The blower is a core component of MAN Energy Solutions’ high-pressure EGR system that raises the exhaust-gas pressure in order to overcome the pressure difference exhaust gas and scavenging air receiver. In addition the blower actively controls the recirculated exhaust gas flow during the EGR flow by varying the blower speed. The desired EGR operating conditions are achieved by using a high-speed electric motor, directly coupled to the compressor wheel and speed controlled by a frequency converter. The MAN ETB features a highly-efficient blower wheel, optimised for the low-pressure ratios found in a two-stroke diesel engine and whose materials are designed to withstand corrosive agents. High blower-availability (even during continuous operation) and variable-speed operation ensure IMO Tier III compliance in emission-controlled areas (ECAs), and potentially also in IMO TIER II mode with the new Eco EGR feature (officially acknowledged by DNV GL). Since May 2015, 2 × ETB18 prototypes have run successfully on an 82,000-dwt bulk carrier equipped with an MAN B&W 6S60ME-C 8.2 Tier III engine. The ETB40 pased its FAT (Factory Acceptance Test) on October 17th. MAN’s EGR system As an alternative to the SCR method within MAN Energy Solutions’ Tier III programme, the EGR method is regarded as a very efficient means by which to reduce NOx in combustion engines. As such, the MAN ETB EGR-blower is suitable for high-pressure EGR engines of all fuel types and in all application ranges. In contrast with SCR systems, EGR systems are integrated with the engine and of a significantly smaller size. In developing the ETB range, MAN Energy Solutions has focused on a cost-optimised and compact design that has the ability to cover the entire MAN two-stroke engine portfolio with just two frame sizes, ETB40 and ETB30 – MAN Energy Solutions’ reports that the smaller ETB30 blower will soon be available.




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