20810128-1 - HEAT TRANSFER MODULE I

The course deals with the laws and methods which allow a quantitative evaluation of heat transfer processes (conduction, convection, radiation) between bodies and inside a body, as well as the temperature field variations these processes cause, with the objective of providing the knowledge necessary to design heat transfer devices.
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Programme

The training program for Module I of Industrial Energetics is divided into two complementary areas: 1. Applied Thermodynamics. The goal is to understand the laws governing energy conversions (heat and work) in order to improve the efficiency of industrial processes. You will learn to: Analyze thermodynamic systems (open and closed) by applying the first and second laws of thermodynamics. Evaluate the performance of direct thermodynamic cycles (thermal power plants, gas turbines, combustion engines) and inverse cycles (heat pumps, refrigeration cycles). Calculate energy and exergy balances to reduce waste and optimize energy resource usage in facilities. 2. Environmental Acoustics. The goal is to acquire the ability to manage sound phenomena, considering both thermal-physical/environmental well-being and compliance with current regulations. You will learn to: Understand the physics of sound propagation in indoor (building) and outdoor (territorial) environments. Assess the acoustic impact of industrial activities and transport infrastructure on the surrounding area. Design mitigation measures (noise barriers, wall sound insulation, absorption systems) to ensure acoustic comfort and safety in the workplace.

Prerequisiti

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Core Documentation

lecturer's handouts

Reference Bibliography

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Attendance

two two-hour classes per week for an academic semester

Type of evaluation

single written exam comprising exercises and theoretical questions

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Programme

Thermodynamics

Fundamentals: physical quantities and units of measurement, closed and open systems, forms of energy, properties of a thermodynamic system, transformations and thermodynamic cycles, temperature and zero principle of thermodynamics, pressure.
The first law of thermodynamics: the concept of conservation of energy, closed and open systems, enthalpy, energy conservation for stationary flow systems.
Properties of substances: pure substances, heat capacity and specific heats, phases of a substance, phase changes of pure substances, state diagrams, equation of state for ideal gases, transformations.
The second law of thermodynamics: statements of the second law of thermodynamics, heat engines, refrigeration machines and heat pumps, reversible and irreversible transformations, Carnot cycle, entropy.
Thermodynamics of humid air: dry air and atmospheric air, absolute humidity and relative humidity, dew temperature, psychrometric diagram, air conditioning, transformations for air conditioning.

Heat transfer

Steady-state thermal conduction: Fourier postulate, analogy with electrical flow, thermal conductivity, one-dimensional conduction in simple geometries, multilayer flat walls, cylindrical geometries, critical insulation radius.
Forced and natural convection: introduction, dimensionless numbers, classification of fluid motion, limit layer of velocity and temperature, natural convection on surfaces.
Irradiation: introduction, thermal radiation, black body radiation, radiative properties, view factors, heat transmission by radiation between black and gray diffusing surfaces, radiation screens.
Applications: thermal transmittance and conductance of walls, critical insulation radius.
Heat exchangers.

Acoustics

Acoustic quantities: general information, sound pressure and sound pressure level, sound power and sound power level, sound intensity and sound intensity level, psychophysical acoustics, normal audiogram, weighting curves.
Free-field and indoor environment propagation: behavior of materials subjected to sound stresses, sound-absorbing and sound-insulating materials, sound-insulating power, sound insulation, Sabine theory.

Prerequisiti

Typical knowledge of the Mathematical Analysis course.

Core Documentation

Educational material provided by the Professor

Books:
Yunus A. Çengel, Giuliano Dall'Ò, Luca Sarto, “Fisica tecnica ambientale. Con elementi di acustica e illuminotecnica”, McGraw-Hill Education

Yunus A. Çengel, “Termodinamica e trasmissione del calore”, McGraw-Hill Education

Fabio Polonara, Gianni Cesini, Gianni Latini, “Fisica tecnica”, CittàStudi (only for in-depth analysis)

Reference Bibliography

Yunus A. Çengel, Giuliano Dall'Ò, Luca Sarto, “Environmental Technical Physics. With Elements of Acoustics and Lighting Engineering”, McGraw-Hill Education Yunus A. Çengel, “Thermodynamics and Heat Transfer”, McGraw-Hill Education (basic text in complete version with compendium of Acoustics and Lighting Engineering) Fabio Polonara, Gianni Cesini, Gianni Latini, “Fisica Tecnica”, CittàStudi

Attendance

Attending lessons is recommended.

Type of evaluation

The exam will be carried out by means of a written test with open theory questions and exercises