APPLIED THERMODYNAMICS AND HEAT TRANSFER
The course teaches the fundamental principles of thermodynamics and their application to the study of refrigeration, air conditioning and ventilation systems.
At the end of the course, the students are able to calculate the thermodynamic properties of pure substances, apply the principles of thermodynamics to the study of open systems and inverse cycles, and analyze the main treatments that the air undergoes in climatization systems. Finally, the students are able to understand the basic principles of construction and operation of refrigeration, air conditioning and ventilation systems.
Knowledge and understanding:
At the end of the course the student must demonstrate:
- to know the fundamental principles of thermodynamics, and understand their application to the study of open systems;
- to know thermodynamics, in terms of evaluating the thermodynamic properties of pure substances;
- to know the main components of refrigeration, air conditioning and ventilation systems, and understand their function;
- to know the basic principles on the construction and operation of refrigeration, air conditioning and ventilation systems.
Ability to apply knowledge and understanding:
The student must demonstrate that he is able to:
- apply the fundamental principles of thermodynamics to the components of the systems encountered on ships;
- apply the thermodynamic knowledge to the operation of the refrigeration, air conditioning and ventilation systems of the ships;
- understand the main functional characteristics of the system components and be able to integrate them into the refrigeration, air conditioning and ventilation systems.
Autonomy of judgment:
The student must demonstrate that he has developed the ability to critically and autonomously evaluate the main problems related to the construction and operation of the refrigeration, air conditioning and ventilation systems that are encountered on the ships.
The student must have gained the ability to explain in a simple way, even to people who are not experts in the field, the basic principles on the construction and operation of refrigeration, air conditioning and ventilation systems that are encountered on the ships.
The student must be able to update his knowledge, through the study of texts and publications concerning the sector of air conditioning systems, starting from the knowledge and the method of analysis learned during the course, in order to integrate the acquired knowledge.
Thermodynamics: models for the evaluation of the thermodynamic properties of pure substances: ideal gases and incompressible liquid, adiabatic internal reversible transformation, superheated steam, subcooled liquid, biphasic mixtures liquid - vapour.
Open Systems: mass conservation equation, first and second law for open systems, equation of mechanical energy.
Basic Principles on the construction and operation of refrigeration, air conditioning and ventilation systems: components: pipes, heat exchangers, steam turbines, gas turbines, pumps, compressors; operator plants: inverted cycles, basic principles, vapor compression refrigeration systems, heat pumps; elements of heat transfer: notions on the three heat transfer mechanisms: conduction, convection and radiation; elements of psychrometry: notions on properties of moist air and its transformations; HVAC plants: conditions for thermal hygrometric comfort, air treatments, fans, air ducts, methods of construction, air flow rate, diffusers.
The contents of the course concern the study of the basic principles on the construction and operation of engine and operator systems and on-board auxiliary systems, with particular reference to refrigeration, air conditioning and ventilation systems.
The course transfers the necessary knowledge to acquire some of the competences related to the basic principles on the construction and operation of machinery systems (for a total of 48 hours) required by the International Convention STCW 2010 to access the professional role of Machine Officer, implemented from the DM MIT 19 December 2016 "Percorso formativo per accedere alle figure professionali di Allievo Ufficiale di Coperta e Allievo Ufficiale di Macchina", as amended by DM MIT n. 35 of 10/10/2018.
In particular, the topics covered in the course, which allow the students to acquire the competences required by the aforementioned decree for Machine Officers, are:
Thermodynamics (10 hours);
Open Systems (8 hours);
Basic principles on the construction and operation of on-board auxiliary systems (30 hours).
The training contents are transferred mainly carrying out lectures and exercises. The teaching approach includes the stimulation of the student's curiosity regarding the knowledge of practical problems, and the development of the ability to solve them.
Notes of the teacher.
Moreover, the teacher will inform students about the specific topics to be explored by studying some paragraphs of the following texts:
- A. Cesarano, P. Mazzei, Elementi di termodinamica applicata, Liguori editore;
-R. Mastrullo, P. Mazzei, R. Vanoli, Termodinamica per ingegneri - Applicazioni, Liguori editore.
- I servizi ausiliari di bordo, ventilazione, refrigerazione, condizionamento dell'aria, C. Ciampa, Liguori editore.
The objective of the exam is to check the level of achievement of the course objectives previously indicated. The exam consists of an oral test during which the professors evaluate: the understanding of the topics covered, the ability to apply the concepts learned to the refrigeration, air conditioning and ventilation systems, and the ability to explain the problems faced in a simple but rigorous manner.