OVERVIEW

During the lectures of Marine Engineering A, the principles of operation and the design techniques for both marine propulsion plants and auxiliary systems will be illustrated. The rules leading the certification process will be analysed with some practical examples.

AIMS AND CONTENT

LEARNING OUTCOMES

The course aims at providing students with the tools for a qualified design, from a technical standpoint and legal , facilities related to the propulsion of ships .

AIMS AND LEARNING OUTCOMES

The teaching unit aims to introduce the fundamentals of designing propulsion and auxiliary systems for pleasure boats used for private purposes. The main components of these systems will be presented and described, providing students with basic knowledge and essential skills for applying the most relevant technical regulations.

Upon completion of the teaching unit, students will be able to perform the following tasks related to pleasure boats intended for private use:

• understand the operating principles, functions, and main characteristics of propulsion and auxiliary systems;
• analyse and compare different design solutions for such systems, highlighting their advantages and disadvantages based on specific requirements;
• apply regulatory references, selecting the appropriate requirements to be adopted during the design phase;
• propose the layout of the propulsion system and main auxiliary systems, identifying their essential components and verifying their compliance with design requirements;
• use appropriate technical language to communicate clearly and effectively with both specialist and non-specialist stakeholders;
• interpret and express information effectively through graphs, diagrams, and technical drawings.

PREREQUISITES

Basic knowledge of physics, technical physics, thermal machines, naval architecture and hydrodynamics is indispensable for understanding the teaching content.

TEACHING METHODS

Teaching will consist of lectures and exercises and small group activities in the classroom with debriefing and discussion. During the lessons, project guides and normative texts will be used in order to develop the skills of critical reading, comprehension and application of technical texts in English in the project field.

Students with valid certifications for Specific Learning Disorders (SLDs), disabilities or other educational needs are invited to contact the teacher and the School's contact person for disability at the beginning of teaching to agree on possible teaching arrangements that, while respecting the teaching objectives, take into account individual learning patterns. Contacts of the teacher and the School's disability contact person can be found at the following link Comitato di Ateneo per l’inclusione delle studentesse e degli studenti con disabilità o con DSA | UniGe | Università di Genova

SYLLABUS/CONTENT

Ship Propulsion Plant 

1. Propulsion Plant. Introduction. Main components. Prime Engine. Propulsion Chain transmission. Propulsor. Design Aspects.
2. Prime Engine Classification. Diesel Engine Technical Characteristic. Application in the function of ship types.
3. Propulsors Classification. Range of application in function of propulsion layout and ship speed. Pros and Cons of a different solution.
4. Chain propulsive. Power chain and Propulsive efficiencies.
5. Engine Technical Characteristics. Working principles of 2T and 4T Engine. Common Rail. Engine Diagram. Power Ratings.
6. Ship Engine Fuel. Types and characteristics of marine fuels. Attention will be paid to pollution aspects.    
7. Engine Margin and Service Margin. Engine margin and Service margin principle. Methodology to choose the prime mover engine.
8. Engine operation prediction with fixed blade propeller. Procedure for calculating propulsion equilibrium points. Autonomy calculation. Propeller “ideal” power request.
9. Energy Efficiency. Propulsion energy efficiency, evaluation and solution for enhanced
10. Gear-Box. Working principles, the procedure for choosing the gearbox. 
11. Thrust Bearing. Purposes and principle of operation.
12. Transmission Line. Transmission Lines, bearings, thrust bearings, stern-tube, loads acting on the shaft. Drawing and sizing.
13. Propulsion system Schematics. Propulsion systems and engine room general layouts. Diesel-Electric Hybrid System.
14. Exercises. Numerical exercises: propeller-engine matching, gearbox selection, shaft line diameter evaluation.

Ship Auxiliary Systems

1. Introduction. System design criteria. Regulations. Classification of systems. Bernoulli's theorem. Request head calculation.
2. Pump characteristics. Pumps operations in series. Pumps operations in parallel. Matching pump-circuit. Required Power Calculation. Energy Consumption.
3. System Components. Valves Types. Filters Types. Pipe Sizing.
4. Bilge System. Operation, components, drawing in the three views, ISO standards, sizing and choice of components.
5. Fire Fighting. Regulations, notes on fire extinguishing methods, active and passive protection.
6. Fuel System. Operation, components, drawing in the three views, standards, sizing and design choices.
7. Fresh water System. Overview, components, autoclave details, one-line diagrams
8. Black Water system. Purpose and operation, regulations, components, one-line diagrams, sizing.
9. Grey Water System. Purpose and operation, gravity grey-water system, vacuum grey-water system, components, drawing layout, installation solutions, sizing.
10. Sea Water System. Overview, drawings, regulations, sizing.
11. Ventilation System. Overview, purposes, components, one-line diagrams, plant solutions, sizing.
12. Exhaust System. Overview, purposes, noise attenuation, muffler, separator, submerged exhaust outboards, plant solutions, drawings, back-pressure evaluation.
13. Exercises. Numerical exercises: Calculate the head required by the circuit and calculate pipe thicknesses.

The program may be modified during the course

RECOMMENDED READING/BIBLIOGRAPHY

All the slides used during the lectures and other teaching material will be available on aul@web.

TEACHERS AND EXAM BOARD

LESSONS

LESSONS START

According to lecture calendar: https://corsi.unige.it/corsi/8721. 

Class schedule

MARINE ENGINEERING A

EXAMS

EXAM DESCRIPTION

There will be 2 examination dates for the winter session (January-February) and 3 dates for the summer session (June, July and September). The examination consists of:

-  Written examination the passing of which with a minimum mark of 16/30 is essential for admission to the oral examination.

- Oral examination consisting of 2 open questions on the teaching unit programme (approx. 15' per question). In order to pass the examination, the candidate is required to answer both oral questions sufficiently.

ASSESSMENT METHODS

The written examination aims to assess the candidate's ability to solve a design problem by responding to a design and regulatory requirement, assuming missing data and resolving ambiguities, motivating and arguing the choices made and selecting the appropriate components from the catalogue.

The objective of the oral interview is to verify the student's ability to argue and critically reason on the topics learnt, to illustrate the more conceptual and theoretical aspects, as well as to apply the knowledge in simple practical problems by rapidly carrying out and adequately justifying realistic, even if approximate, quantitative evaluations in the absence of data and calculation tools.

FURTHER INFORMATION

Ask the professor for other information not included in the teaching schedule