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A Study on Torque Rich Phenomena in Ship Operation



Author(s)

Dang Van Uy

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DOI:10.17265/2159-5879/2016.03.004

Marine Engineering Department, Vietnam Maritime University, Haiphong City 180000, Vietnam

The “torque rich” is known as a phenomenon that makes reduction of ship speed, overload for main engine and higher fuel consumption of ship, even can cause some major problems for a ship propulsion system. In Vietnam, according to investigated results, almost ships of country merchant fleet are facing with ship speed decrease, fuel consumption increase due to the torque rich, consequently the average ship operation cost is increasing from 15% to 25%, even higher in some cases and the environment is badly
impacted. To comply with the international requirements and national legislation regarding to “using efficiently energy and environment protection”, Vietnamese shipping companies must combat with the torque rich problem as crucial reason making downgrade in ship operation. The article shows a potential method to reduce the torque rich phenomena by modifying propeller which has been successfully applied for a real ship in Vietnam.

Torque rich, energy, propeller, diesel engine