Politecnico di Torino
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Politecnico di Torino
Academic Year 2009/10
02IJIFF, 02IJIEU
Fundamentals of machines
1st degree and Bachelor-level of the Bologna process in Energy Engineering - Torino
1st degree and Bachelor-level of the Bologna process in Chemical Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Nuccio Patrizio ORARIO RICEVIMENTO     36 20 0 0 12
SSD CFU Activities Area context
ING-IND/08 5 B - Caratterizzanti Ingegneria meccanica
Objectives of the course
The course aims to show the characteristics of thermal and hydrodynamic machines. It deals with a theoretical and a descriptive part. Particular attention is focused on the choice of the most appropriate machinery in order to maximize plant efficiency. Through the systematic application of the principles of thermo-fluid-dynamics to machine components, the module provides the students with the ability to choose engineering-plant solutions in energy conversion systems related to their applications. The module also aims at supplying the performance operations of the energy system in which the thermal and hydraulic machines are inserted.
Expected skills
The student should be able to critically analyze thermal and hydraulic machines, with reference to their employment in design conditions and to carry out a preliminary design for steam turbine, gas turbine and reciprocating engine power plants in order to determine their performance.
Prerequisites
It is necessary to be familiar with the topics covered in the course of Fundamentals Engineering Thermodynamics, Heat transfer and Mechanics.
Syllabus
Introduction and machine classification. Thermodynamic and Fluid-dynamic fundamentals. Nozzles and diffusers. Euler's equation. Turbines: main components and triangles of velocity. Centrifugal gas compressors: specific work, mass flow and power; characteristic curve. Centrifugal pumps: work head required, efficiency and power adsorbed; pump characteristic, cavitation. Positive displacement gas compressors: reciprocating compressor, ideal and actual working cycle, flow rate control methods. Simple Rankine-Hirn cycle: steam plants and their efficiency. Joule's ideal cycle: efficiency and work; simple turbo-gas plant. Combined and cogenerative power plants. Reciprocating internal combustion engines: ideal cycles and efficiency; characteristic thermal and mechanical losses, actual power and efficiency; cogeneration plants of both mechanical and thermal energy.
Laboratories and/or exercises
The classroom training consists in solving exercises and practical problems by applying the concepts covered in the lessons. The aim of the training is to give the students the order of magnitude of the main parameters and to improve their degree of understanding.
Bibliography
G. C. Ferrari: Hydraulic and Thermal Machines. Ed. Progetto Leonardo, Bologna 2007.
A. Capetti: Motori Termici. Ed. UTET, 1967.
A.E. Catania: Complementi di macchine. Ed. Levrotto & Bella, 1979.
G. Lozza: Turbine a gas e cicli combinati. Ed Esculapio, 1997.
G. Cornetti: Macchine a fluido. Ed. Il Capitello,1991.
Check availability at the library
Revisions / Exam
The exam consists of a written test both on practical problems and theory.

Programma definitivo per l'A.A.2009/10
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