Study Of The General Design For A Suezmax Shuttle Tanker

Nowadays, with the development of the trend that the land oil resources is becoming lesser and lesser and the production of the oil fields at shallow sea area is gradually dropping, many countries in the world has focused on the exploration and mining of the deepwater oil and gas fields. Since the deepwater oil and gas fields, with complicated seabed and wicked sea state, are far away from land, it’s difficult to lay the oil/gas pipe. Based on this, plenty of shuttle tankers are needed to transport oil between the floating oil production platform and ports. This thesis develops an advanced environmental protection and energy saving shuttle tanker which fulfills the requirements of EEDI (Energy Efficiency Design Index). The new developed 152,000 DWT shuttle tanker reaches the international advanced level at all the main technical performance indices including tank capacity, fuel oil consumption and service speed etc.Firstly, comparison and analysis about the class notations for the current mainstream shuttle tankers is conducted. The following class notations are deeply studied: DYNPOS-AUTR、BOW LOADING、COMFV(3)C(3) and NAUT-AW.Then, the principal particulars of the Suezmax Shuttle Tankers, both domestic and overseas, are collected, compared and analyzed. Taking the size limitation of ships passing through the Suez Canal, the yard’s dock size limitation, ship’s performance and building cost into consideration, the optimum main dimensions are chosen to perform the general arrangement and tank subdivision of the vessel. Also, the Bow Loading System and Dynamic Positioning System are well considered and designed.Next, the hull lines of the designed shuttle tanker is obtained through the transformation of the parent ship. NAPA software is adopted in the process of transformation. Besides, the commercial CFD software RAPID (potential flow field) and Parnassos (viscous flow field) are also used to perform the lines optimization from the aspects of both the wave-making and wake flow field. Both the lines before and after optimization are numerically calculated. The calculation results show that the optimized hull realizes an obvious improvement in hydrodynamics performance. The wave along the vessel reduces a lot and the distribution of the wake field become more uniform. To validate the effectiveness of the optimization, model test is carried out based on the optimized hull lines. The conclusion can be drawn from the speed-power curve (both design draught and scantling draught) obtained from the tank test that the resistance performance of the optimized hull achieves a big improvement. At last, the calculation formula of EEDI is analyzed in detail in the thesis. The main engine is selected as MAN B&W 6S70ME-C8.5 (Tier II). The lightweight estimation is conducted based on statistic formula method and ship coefficients method. The calculated value for EEDI is 2.88, while the benchmark value is 3.61. This vessel fulfills the requirements of 20% emission reduction between 2020 and 2024.