G O Ariavie

The project is focused on designing and simulating a controllable-pitch marine propeller,for small to medium sized vessel such as fishing trawlers, passenger ferries, tugs and yacht, recognizing the pivotal role such technology plays in optimizing vessel performance. By addressing limitations in conventional fixed-pitch propellers, the project has been able to contribute to the evolution of marine propulsion systems, pushing the boundaries of efficiency and adaptability.

The project methodology involved a comprehensive literature review on marine propulsion and propeller design principles, followed by the formulation of a mathematical analysis for the controllable-pitch propeller design. SolidWorks 3D modeling software is utilized to create a detailed propeller design, which is then subjected to Computational Fluid Dynamics (CFD) simulations to analyze hydrodynamic performance.

An iterative optimization process refines the design based on simulation outcomes, aiming for enhanced efficiency and performance. Through parametric studies and optimization, the project successfully demonstrates the efficiency gains achievable by adjusting the blade tip pitch angle. The controllable-pitch propeller's ability to adapt to varying operational conditions is highlighted, showcasing its potential for improved fuel efficiency and maneuverability. The project contributes to the ongoing advancements in marine propulsion technology, offering insights into the design and simulation of controllable-pitch propellers for small to medium-sized vessels.

ABSTRACT

The pipelines that transport petroleum products across Nigeria are vital for the country’s economy and energy security. However, they are also exposed to various hazards and risks, such as theft, sabotage, corrosion, impact damage, fire, explosion, and environmental pollution. These risks can cause significant losses of life, property, and revenue, as well as damage the reputation and credibility of the pipeline operators. Therefore, it is essential to conduct a hazard and operability (HAZOP) study and a risk assessment of the pipelines to identify the potential causes and consequences of failure, and to propose appropriate mitigation measures.
A Hazard and Operability (HAZOP) analysis of pipelines is a systematic and structured process used to identify potential hazards, operability issues, and risks associated with the design, operation, and maintenance of pipeline systems.
This report presents the methodology and results of a HAZOP study and a risk assessment of the pipelines across Nigeria. The report also reviews the existing literature on the topic and compares the findings with the data collected around the pipelines observed in around Edo State. The report also went ahead to calculate the third party damage index for some selected pipelines and examines the pipeline right of way conditions in such locations.
The report aims to provide useful information and recommendations for the pipeline, regulators, stakeholders, and researchers who are involved or interested in the safety and reliability of the pipelines across the State.

TABLE OF CONTENTS

Pipeline infrastructure plays a critical role in Nigeria‘s energy sector, yet persistent challenges like unauthorized third-party activities threaten its security, reliability, and efficiency.This project focuses on improving pipeline monitoring systems, particularly in the context of Nigeria‘s challenges with third-party interference like vandalism and oil bunkering. The research examines existing monitoring methods (fiber-optic sensing, acoustic leak detection, real-time surveillance, and SCADA),analyzes successful global pipeline monitoring strategies (TransAlaska and Nord Stream) and addresses the limitations of current monitoring systems. The study proposes an Improved Hybrid Pipeline Protection System (IHPPS) that integrates multiple technologies (flow measurement sensors, acoustic monitoring, GPS tracking, and IoT-based remote surveillance). The IHPPS aims to enhance detection accuracy, minimize false alarms, and improve real-time response, ultimately reducing economic, environmental, and security risks.
The study concludes that a multi-layered monitoring system is crucial for improving pipeline reliability and security.