OVERVIEW

The course deals with the fundamentals of positive displacement and dynamic fluid machines in order to analyse their functional behaviour and evaluate the key performance aspects.

AIMS AND CONTENT

LEARNING OUTCOMES

The aim of the course is to provide the student a basic knowledge of positive displacement and dynamic fluid machines with reference to their functional behaviour and performance characteristics.

AIMS AND LEARNING OUTCOMES

At the end of the course the student should achieve a basic knowledge about the operation of positive displacement and dynamic fluid machines and be able to evaluate the main performance aspects.

PREREQUISITES

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

TEACHING METHODS

The course is organized in lectures and exercises.

SYLLABUS/CONTENT

A. Positive displacement fluid machines

- Introductory concepts

Classification of fluid machines. The energy equation and the expression of work. Conversion efficiency in fluid machinery. Work exchange in the positive displacement fluid machines .

- Reciprocating internal combustion engines (ICE)

Historical overview and fields of application. Basic knowledge on ICE: classification, components and nomenclature, main operational parameters. Ideal and real operation of 2 and 4 stroke engines. Indicated diagrams, indicated and brake mean effective pressure, engine power correlations. Reference thermodynamic cycles for spark ignition (SI) and diesel engines. Combustion processes: general aspects, combustion in SI and diesel engines. Part load operation of SI and diesel engines. ICE performance curves. Supercharging and turbocharging: basic plants design, application fields, operational issues. ICE emissions: pollutants formation processes and their effect on health and environment, influence of combustion process and operational engine parameters on exhaust emissions, emission control systems and aftertreatment devices for SI and diesel engines.

- Positive displacement compressors and pumps

Reciprocating displacement compressors: operating principle, constructive characteristics, ideal and real working cycle, flow rate control systems. Rotary displacement compressors: vane, lobe, liquid ring, screw compressors. Volumetric pumps: alternative and rotary machines, working principle, construction types. Characteristic curves. Fluid machine-circuit matching.

RECOMMENDED READING/BIBLIOGRAPHY

• M. Capobianco - “Macchine volumetriche” – Appunti del corso.
• 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

Exam Board

SILVIA MARELLI (President)

VITTORIO USAI

MASSIMO CAPOBIANCO (President Substitute)

FRANCESCA SATTA (President Substitute)

DARIO BARSI (Substitute)

VIRGINIA BOLOGNA (Substitute)

MATTEO DELLACASAGRANDE (Substitute)

DAVIDE LENGANI (Substitute)

FEDERICO NANNETTI (Substitute)

FEDERICO ONNIS (Substitute)

DANIELE PETRONIO (Substitute)

DANIELE SIMONI (Substitute)

GIORGIO ZAMBONI (Substitute)

LESSONS

LESSONS START

https://corsi.unige.it/en/corsi/8720/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.

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 Federico Scarpa (federico.scarpa@unige.it), the Polytechnic School's disability liaison.

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.

Exam schedule

FURTHER INFORMATION

Pre-requisites:

Energy Systems course contents.

Basic knowledge of thermodynamics and fluid mechanics.