OVERVIEW

The course, aimed at students in the Naval Engineering Bachelor's Degree Program at the Polytechnic School of the University of Genoa, provides the fundamental skills needed to interpret the processes and related basic technologies involved in fluid and thermal machines. This allows students to master the fundamental principles of thermodynamics and fluid dynamics applied to machines, as well as address the application problems inherent in the use of fluid machines when employed onboard vessels (power units: internal combustion engines, gas turbines, steam plants; operating machines: compressors and fans, pumps).

AIMS AND CONTENT

LEARNING OUTCOMES

To give the student a knowledge regarding the typology and physical running principles regarding the energy conversion machinery (i.e.: engines, turbines, compressors, pumps), employed on the ships.

AIMS AND LEARNING OUTCOMES

At the end of the teaching unit the student will be able to:

• Describe and analyze operations of positive displacement and dynamic fluid machines, identifying strengths and weaknesses.
• Evaluate the main operational, performance and energy parameters of fluid machines, comparing the available options.
• Reproduce and discuss the characteristic curves of the different types of machines.
• Perform numerical calculations to determine the functional characteristics and performance parameters of the machines
• Select the quantities related to the environmental impact of the machines.

Thanks to the attendance of the planned educational activities, it will be possible to obtain the following skills: ability to manage own social interactions, collaborative attitude, constructive communication in different environments (social competence).

PREREQUISITES

The basic knowledge necessary to understand the topics covered in the course concern the following subjects: Mathematics, Geometry, Physics, Chemistry, Thermodynamics.

TEACHING METHODS

Theoretical lessons and exercises.

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 DIME contact person (federico.scarpa@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
 

SYLLABUS/CONTENT

General Information: Meaning of the term "machine," nomenclature and classification of machines, energy sources and their uses. Fundamental laws of physics, thermodynamics, and fundamental equations used in the study of machines.
Energy systems: Solar and wind power engines. Steam and gas engines; reference cycles, work, power, efficiency, optimization criteria, and regulation. Constructional and functional description of the main machines used in these systems. Basic diagrams of combined gas-steam systems, cost per kWh.
Internal combustion engines: Types, thermodynamic cycles, constructional and functional aspects, fuels, supercharging, and regulation. Parameters and characteristic curves. Fuel injection systems and combustion processes, generation and reduction of pollutants. Alternative fuels for marine engines.
Compressors and air-cooled turbomachinery: Dynamic compressors and fans (centrifugal and axial).
Hydraulic operating machines: Centrifugal, mixed, and axial dynamic pumps; Cavitation, regulation, installation.
Compressors and positive-displacement pumps: Reciprocating and rotary positive-displacement compressors; operating principles, work, power, efficiency, characteristic curves, stability, regulation. Reciprocating and rotary positive-displacement pumps.

RECOMMENDED READING/BIBLIOGRAPHY

Notes of the unit will be available in the Aulaweb page for all the registered students, including student workers.

• R. Della Volpe - “Macchine” - Liguori Editore, 2011.
• V. Dossena, G. Ferrari, P. Gaetani, G. Montenegro, A. Onorati, G. Persico - “Macchine a fluido” - CittàStudi Edizioni, 2020.
• G. Cornetti, F. Millo - “Macchine idrauliche”, “Macchine a gas” - Il Capitello, 2015.
• G. Ferrari - "Motori a combustione interna" - Esculapio, 2016.
• O. Acton, C. Caputo - “Compressori ed espansori volumetrici”, UTET, 1992.
• O. Acton - “Turbomacchine”, UTET, 1992.

TEACHERS AND EXAM BOARD

LESSONS

LESSONS START

https://corsi.unige.it/8722/p/studenti-orario

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

Oral exam on the topics presented during the lessons and exercises. Two questions will be considered, one on positive dsplacement machines, one on turbomachines.

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 DIME contact person (federico.scarpa@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

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 and the aptitude of correlation of different topics. The clarity of presentation, the correct use of technical terminology and the ability to reproduce technical diagrams will also be assessed.

FURTHER INFORMATION

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