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Politecnico di Torino
Academic Year 2007/08
01KBNGC
Advanced engineering thermodynamics
Master of science-level of the Bologna process in Mechanical Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Borchiellini Romano ORARIO RICEVIMENTO PO ING-IND/10 36 16 4 0 6
SSD CFU Activities Area context
ING-IND/10 5 B - Caratterizzanti Ingegneria meccanica
Syllabus
PRINCIPLES OF THERMOFLUIDYNAMICS
Deduction of the equation of mass and momentum conservation by elementary control volume. Deduction of the wave equation. Small deviations from the conditions of local equilibrium. Phenomenological relations in Navier-Stokes-Fourier equations: stress tensor and thermal flux. Generalization of the results obtained by the ideal gas to other types of fluids. Dimensionless equations. Meaning of dimensionless numbers. Incompressible limit. Equation for kinetic energy and enthalpy. First principle of thermodynamics. Generalization of entropy for continuous body. Generalization of Gibbs's correlation. The second principle of thermodynamics for a continuous body. Work, heat and the thermodynamics of irreversible processes. Deduction of the integral equations for closed systems and open systems. Technical formulation of integral equations. Physical meaning of irreversibility. Correct calculation of irreversibility by practical formulas. Turbulence and turbulent flows. Characteristic scales of the phenomenon, deduction of the equations for the average quantities and the closure problem. Artificial viscosity induced by turbulence and modeling.
THERMODYNAMICS
Exergy balance in a reversible system. Exergy and internal exergy for an ideal gas. The theorem of Guy-Stodola. Physical meaning of exergy. Efficiency according to the second principle. Examples of exergy analysis. Exergy diagrams. Thermodynamics of gas mixtures: models of Gibbs-Dalton and Amagat-Leduc. Exergy of gas mixtures. Thermodynamic diagrams. Moist-air flow: main quantities and exergy of moist-air mixture. Psychrometers. Main thermodynamic transformations of moist-air mixture: heating, cooling and dehumidifying. Adiabatic humidification. Thermo-psychrometric balance of an environment: winter and summer configuration. Load calculations. Air conditioning with and without air recirculation.
LIGHTING
The light, electromagnetic radiation, main features, diffuse radiation. Visual perception and photometric system. Definition of physical units of measured quantities. Point source. Light intensity. Indicator of emission. Light flux emitted from a point source with a given indicator of emission. The first formula of Lambert. Linear source, linear luminance, and lighting calculations on surface. Surface source, luminance, and lighting calculation on a surface. The second law of Lambert. Lambert emitter. Efficiency of a light bulb.
ACOUSTICS
Introduction, elastic, plane, longitudinal and progressive waves. The equation of the wave displacement. Pressure wave of pressure and its equation. Propagation speed of elastic waves; sound speed of air. Mechanical power transported by sound wave, wave intensity, resistance and effective pressure. Acoustic intensity and acoustic feeling: the law of Weber-Fechner. Diagram of the normal acoustic response. Acoustic field, feeling and the intensity level, decibels. Iso-phon curves. Frequency bands, level of pressure, interpolating weight curve A. Interaction between elastic waves and materials, factors of reflection, transmission, absorption, apparent absorption. Effect of frequency. Apparent absorption factor of several walls. Acoustics in open environments. Open field. Sound tail. Acoustic energy balance and reverberation, reverberation time by conventional formula of Sabine. Sound insulation; sound proofing; plain wall and law of mass and frequency; case study for a pipe.
Bibliography
M. Calý, P. Gregorio, 'Termodinamica' Esculapio, Bologna 1997.
Bejan, 'Advanced Engineering Thermodynamic' John Wiley & Sons 1997.
G. Guglielmini, C. Pisoni, Introduzione alla trasmissione del calore, Casa Editrice Ambrosiana, 2002
G. Comini, G. Cortella, Fondamenti di trasmissione del calore, Servizi Grafici Editoriali, 2001.
Revisions / Exam
The exam is oral and it is based on a detailed discussion about the assigned project.
Booking the final examinations is compulsory.
Notes

Urgent information concerning both the course and examinations will be communicated using the appropriate spaces made available by the Politecnico's web site. This web site will give all the other information about the course, including the detailed program, examples of examination, information on workshops and so on.

Programma definitivo per l'A.A.2007/08
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