Influence of Various Trim Conditions on Vessel’s Fuel Consumption
Mahdi Birafane1, Sarvar Khalikov2, Munojat Isakdjanova3, Margulan Dairshenov4

1Mahdi Birafane*, College of Transport & Communications, Shanghai Maritime University, Shanghai, PRC.
2Sarvar Khalikov, College of Transport & Communications, Shanghai Maritime University, Shanghai, PRC.
3Sarvar Khalikov, School of Logistics, Inha University in Tashkent, Tashkent, Uzbekistan.
4Munojat Isakdjanova, Tourism Department, Yeoju Technical institute in Tashkent, Tashkent, Uzbekistan.
5Margulan Dairshenov, Kazakhstan Maritime Academy, Kazakh-British Technical University, Almaty, Kazakhstan.
Manuscript received on March 15, 2020. | Revised Manuscript received on March 24, 2020. | Manuscript published on March 30, 2020. | PP: 4636-4657 | Volume-8 Issue-6, March 2020. | Retrieval Number: F9787038620/2020©BEIESP | DOI: 10.35940/ijrte.F9787.038620

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Abstract: Shipping companies, operators and mariners underestimate the importance of trim to the factors such as company’s budget expenditure, vessel’s fuel consumption and environmental pollution. As the result, negative effect on those factors due to inefficiently trimmed ship arises. Therefore, the objective of this thesis is to verify the role of vessel’s trim on fuel consumption and determine the optimum trim value for different types of ships at different conditions. The trim of the ship is important both to carry the maximum amount of cargo safely and maximise the fuel efficiency of the ship. Two main factors affect the trim – one is the shape of the underwater form of hull/water plane area at the particular draft and the other is the distribution of weights such as ballast water, cargo and fuel in the vessel. The influence of trim on fuel consumption is hydro-dynamically related to the ship’s resistance. Thus, as a vessel adjusts her angle of trim, the total resistance also changes. As the result, for the ships with the same deadweight and speed ratio, the total fuel expenditure can vary considerably. Therefore, depending on resistance a ship experiences, the optimum trim condition can be obtained. This manuscript clearly indicates that each vessel is unique and has an individual approach that should be applied to achieve the most efficient condition of sailing. Thus, for a fishing boat, it is essential to maintain zero trim or little trim to fore, while for unloaded container ship the optimum trim is achieved at 3 meters by the stern. For VLCC and passenger ship, however, the optimum position is reached at the same value of trim, namely 1-meter aft trim. Applying the results of conducted experiments, the optimum trim condition can be obtained and unnecessary losses of shipping company will significantly be reduced. Moreover, efficiently consumed fuel will allow decreasing the amount of gas emissions produced, reducing the negative effect on the environment. Furthermore, to sharpen the understanding of the role of trim of fuel consumption, it is recommended to study the influence of various angles of trim on fuel efficiency while the different types of ships maintain constant draft.
Keywords: Trim Opimisation, Energy Efficiency, Fuel Efficiency, Fuel Consumption.
Scope of the Article: RF Energy Harvesting.