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Class 1 (Chief Engineer) Engineering Management 📅 Feb 2024

Exam Question

Optimization of hull Forms is recognized as means to improve energy efficiency of ships. Discuss scope and impact of optimization of the following in improving energy efficiency of ships: (16) 

(a) Forebody optimization

(b) Aft-body optimization

(c) Twin Skeg Design

Reference Answer

### Introduction to Hull Form Optimization
Optimization of a ship's hull form is a fundamental aspect of naval architecture aimed at minimizing the total resistance the vessel experiences while moving through water. This directly enhances energy efficiency, leading to reduced fuel consumption and lower greenhouse gas (GHG) emissions. For a given speed, the required engine power is directly proportional to the total resistance ($$P_B = R_T \times v$$). Therefore, any reduction in total resistance ($$R_T$$) translates to significant operational savings and improved compliance with international regulations such as the Energy Efficiency Design Index (EEDI), Existing Ship Energy Efficiency Index (EEXI), and the Carbon Intensity Indicator (CII).
Total resistance is primarily composed of:
* **Frictional Resistance:** Due to the friction between the hull's wetted surface and the water.

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