International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 10 | Oct 2024
p-ISSN: 2395-0072
www.irjet.net
Study of Advanced Technology to Reduce Fuel Oil Consumption (FOC)Using Air Lubricating System (ALS) in Vessel Rajesh G1, Prakash M2, Mariappan A C3, Peter Packiaraj G4 1,2Rajesh G, Prakash M, Final Year BE Marine Cadets, PSN CET, Tirunelveli, Tamil Nadu 3,4Assistant Professor, Dept of Marine Engineering, PSN CET, Tirunelveli, Tamil Nadu
----------------------------------------------------****-----------------------------------------------------1. ABSTRACT
3- Functional analysis of air injection unit
An air lubricating system (ALS) is a technology used primarily in maritime vessels to reduce friction of the vessels hull in the sea water hence, enhancing fuel economy and reduce emission the system works by generating and injecting a layer of air bubbles besides the hull's surface, creating a thin, insulating layer those minimizes direct contact to the water and the vessels hull. This air layer significantly decreases hydrodynamic drag, let the vessel to pass more effective in the water. The system typically includes components like compressors, air distribution units, and control systems to manage the generation and flow of air bubbles. By reducing friction air lubricating systems can lead to substantial fuel savings and lower operational costs, contributing to more sustainable maritime operation.
The air lubricating system (ALS) in ships is a cuttingedge technology aimed at enhancing maritime efficiency by reducing hydrodynamic drag into the ship's hull and sea water. This system introduces a controlled coating of air bubbles beneath the hull, which acts as a lubricant, thereby minimizing resistance as the ship moves through the water. This solution has emerged as a significant idea of the marine industry, where fuel economy and environmental impact are major concerns. By decreasing the frictional resistance, an air lubricating system helps in lowering fuel usage, decreasing the construct cost, and cutting down on co2 emission The ALS is particularly relevant in the context of increasingly stringent environmental regulations and the rising costs of marine fuel. As the industry seeks sustainable solutions to meet these challenges, the adoption of air lubricating systems offers a promising pathway to achieving greater fuel efficiency and reducing the carbon footprint of maritime operations. This introduction of ALS represents solution make global shipping more environmentally and economically sustainable.
Keywords: Air Lubricating System (ALS), Silverstream technology, Mitsubishi Technology, Air Layer Energy Saving System (ALES), MAN 8L32/44CR Engine
2. INTRODUCTION 2-1 Air Injection Unit: In this strategically placed along the hull, especially at the bottom. They release a controlled flow of air, forming a carpet of micro-bubbles that coats the hull surface. 2-2 Bubble Formation and eject: The injected air forms small bubbles that spread through the hull, it creating a thin air coating that minimizes direct contact with the hull and sea water. The even separation of bubbles is crucial for maintaining an effective lubricating layer. 2-3 Hull Design and Modifications: The hull of ships equipped with air lubrication systems may be designed or modified to optimize the effectiveness of the air layer. This includes shaping the hull to ensure that bubbles are evenly distributed and maintained during the ship's operation.
Figure-1 An image of an air lubrication method
2-4 Control and Monitoring Systems: Sensors and control systems monitor the bubble layer and adjust the air flow as necessary to maintain optimal lubrication under varying sea conditions and speeds.
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An air ejects in air blow-off portion mounted on the bottom of the hull and the air bubbles flow covers the bottom of the hull
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