Tokyo: Japanese shipping giant MOL says it has verified continuous operation of a ship's main engine in all load ranges, by increasing the output of the engine's auxiliary blower motor.
Generally, the main engine of an ocean shipping vessel takes air into the combustion chamber using an auxiliary blower for low speeds or low-load ranges, and a turbocharger for high speeds or in high-load ranges. However, continuous operation of the engine in-between range has been difficult due to degraded combustion and increased exhaust gas temperature caused by air shortage. MOL's recent tests have verified that increasing the output of the auxiliary blower motor ensures a sufficient air supply to allow continuous operation in all load ranges.
MOL points out that low-speed vessel operation is an effective way to reduce fuel consumption and CO2 emissions. Allowing for vessel operation without limiting load ranges opens up more opportunities for low-speed operation than ever before. It is also one of the basic technologies for the "ISHIN-III" series of next-generation vessels MOL announced as an initiative to reduce the environmental impact of its ocean shipping operations. [13/10/10]
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