OVERVIEW

The course deals with the most relevant topics relating to the main fluid machines with particular reference to those applied to naval propulsion sector

AIMS AND CONTENT

LEARNING OUTCOMES

The aim of the course is to give students a solid foundation in positive displacement and dynamic fluid machines, focusing on their functional behavior and performance characteristics. Special attention is given to fluid machines used onboard, including selection criteria and key aspects of their operation under part load conditions.

AIMS AND LEARNING OUTCOMES

The aim of the module is to provide an adequate and critical knowledge on the main fluid machines with particular reference to those applied to maritime transport sector, taking into account turbines, compressors and pumps, internal combustion engines with special reference to energy-related and environmental issues.

The student attendance during the lessons and related study activities will allow:

- to identify the main features of the internal combustion engines used in the different application areas;

- to know the main features related to environmental impact of internal combustion engines;

- to identify the main features of the internal combustion engines used in the different application areas.

TEACHING METHODS

The module is articulated into classroom frontal lessons, which foresee not only presentation and discussion of the theoretical contents, but also some numerical applications aimed at promoting learning and comprehension.

Students who have valid certification of physical or learning disabilities on file with the University and who wish to discuss possible accommodations or other circumstances regarding lectures, coursework and exams, should speak both with the instructor and with Professor Silvana Dellepiane - silvana.dellepiane@unige.it.

SYLLABUS/CONTENT

Lectures

• General remarks on fluid machines – Primary energy sources and their transformations – Power plants and relevant application areas – Energy equation and expression of work in closed and open systems - Fluid machines classification - Work exchange in volumetric machines and turbomachines - Euler’s equation  - Conversion efficiency in fluid machines - Thermodynamic cycles - Thermal power plants overall efficiency - Specific fuel consumption.
• Compressors and pumps – Positive displacement and dynamic compressors – Compressor insertion in a circuit – Characteristic curves - Positive displacement and dynamic pumps – Pumps operative problems: operating point and flow regulation, series and parallel operation, pump priming, surge and cavitation.
• Internal Combustion Engines (ICE) – ICE classification, engine components, nomenclature, operational parameters – Ideal and real operation of 2 and 4 stroke engines – Reference thermodynamic cycles for SI and diesel engines – Combustion processes in ICE – Indicated diagrams, indicated and brake mean effective pressure, engine power correlations –  Engine part load operation – Constant speed and constant load curves, engine performance maps – Supercharging and turbocharging – ICE pollutant emissions – Emission control systems and aftertreatment devices.
• Alternative fuels  – Overview of the use of alternative fuels for propulsion in the maritime sector. Natural Gas and Hydrogen: problems, energy-related, operating and economic issues, effect on exhaust emissions. 

Practice

• Calculation of energy systems, compressors, pumps and internal combustion engines operating parameters.

RECOMMENDED READING/BIBLIOGRAPHY

Lesson notes and classroom material (which can be downloaded in aulaweb) are sufficient for the exam preparation.

• S. Marelli, V. Usai: “Macchine 1” – Notes to the course (in Italian).
• S.L.Dixon - Fluid Mechanics Thermodynamics of Turbomachinery - Pergamon Press, 2005.
• C.R. Ferguson, A.T. Kirkpatrick - Internal Combustion Engines - Wiley, 2001.

TEACHERS AND EXAM BOARD

Exam Board

SILVIA MARELLI (President)

ANNALISA MARCHITTO

MARIO MISALE

FRANCESCO DEVIA (President Substitute)

VITTORIO USAI (President Substitute)

LESSONS

LESSONS START

https://corsi.unige.it/8721/p/studenti-orario

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

Oral exam focusing on specific arguments developed within the course.

Students with a certified learning disability (DSA), a disability, or other special educational needs are invited to contact the instructor at the beginning of the course to discuss teaching and examination arrangements that, while respecting the learning objectives of the course, take individual learning needs into account and provide appropriate accommodations.
Please also note that requests for exam accommodations or exemptions must be submitted using the form available at this link 
https://modulionline.unige.it/richiesta-adattamenti#no-back , to the course professor, the DITEN contact person (Silvana Dellepiane - silvana.dellepiane@unige.it), and the relevant office (inclusione.studenti@info.unige.it) at least seven working days before the examination, in accordance with the guidelines available at this link 
https://unige.it/disabilita-dsa/richiesta-servizi

ASSESSMENT METHODS

Oral exam on the main subjects of the lessons. The oral examination will be focused on the topics treated during the lessons and will be aimed at evaluating not only the fulfilment of an adequate knowledge level, but also the acquisition of critical analysis skills on the topics of the exam.

FURTHER INFORMATION

Pre-requisites:

It is required that the student has acquired sufficient knowledge of the basic aspects related to thermodynamics and fluid mechanics.

Please ask the professor for any additional information not included in the teaching schedule.