The aim of the course is to provide students with general criteria and methods to carry out the analysis of fluid machines and energy conversion systems. After the course, the student should have an up-to-date picture of the most relevant solutions to produce mechanical and electrical power. He/she will acquire the tools that would enable him/her to set up the analysis of energy conversion systems and evaluate their performance in terms of efficiency and power. Moreover, he/she will know the most relevant typology of fluid machines, their field of application, the factors affecting perfomance (i. e. mechanical and thermal stresses, cavitation, compressibiliy effects).
teacher profile teaching materials
Positive displacement machines (pumps and compressors): indicator diagrams, power consumption and efficiency, machine control.
Turbomachines: flow through stationary and moving ducts, Euler equation and energy equation, velocity vector triangles, degree of reaction.
Work absorbing turbomachines (pumps and compressors): characteristic curves, application of similarity laws, cavitation problems. Operation with working fluids of interest for marine applications. Machine control.
Turbines for compressible flow: impulse and reaction axial stages, blade efficiency and stage efficiency. Power limits of a turbine. Off-design performance and control.
Gas Turbine based plants: thermodynamic cycle analysis, regenerative heating, state of-the-art and future trends. Gas-steam combined plants: thermodynamic cycle analysis, offshore applications.
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CAPUTO C., “Le turbomacchine”, ed. Masson, Milano, 1994;
CAPUTO C., “Le macchine volumetriche”, ed. Masson, Milano, 1997.
Programme
Classification and characterisation of fluid machines. Principles underlying volumetric and dynamic machines. Performance of a fluid machine. Review of engineering thermodynamics. Energy conversion. Machines and plants.Positive displacement machines (pumps and compressors): indicator diagrams, power consumption and efficiency, machine control.
Turbomachines: flow through stationary and moving ducts, Euler equation and energy equation, velocity vector triangles, degree of reaction.
Work absorbing turbomachines (pumps and compressors): characteristic curves, application of similarity laws, cavitation problems. Operation with working fluids of interest for marine applications. Machine control.
Turbines for compressible flow: impulse and reaction axial stages, blade efficiency and stage efficiency. Power limits of a turbine. Off-design performance and control.
Gas Turbine based plants: thermodynamic cycle analysis, regenerative heating, state of-the-art and future trends. Gas-steam combined plants: thermodynamic cycle analysis, offshore applications.
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Prerequisiti
The prerequisite background consists in calculus, physics (mechanics and thermodynamics) fluid-mechanics, chemistry (with reference to combustion processes).Core Documentation
CAPUTO C., “Gli impianti convertitori di energia”, ed. Masson, Milano, 1997,CAPUTO C., “Le turbomacchine”, ed. Masson, Milano, 1994;
CAPUTO C., “Le macchine volumetriche”, ed. Masson, Milano, 1997.
Reference Bibliography
BECCARI A., CAPUTO C., “Motori termici volumetrici”, ed. UTET, Torino, 1987; LOZZA G., “Turbine a gas e cicli combinati”, Soc. Editrice Esculapio, Bologna, 1996; DIXON S. L., “Thermodynamics of Turbomachinery”, Pergamon Press, Oxford, 1982; COHEN H., ROGERS G. F. C., SARAVANAMUTTOO H. I. H., “Gas Turbine Theory”, Lomgman Group Ltd, Padstow, 1998Type of evaluation
Oral examination. The exercises assigned during the course will be discussed in the oral test.