|Politecnico di Torino|
|Academic Year 2007/08|
Fundamentals of technical physics
1st degree and Bachelor-level of the Bologna process in Automotive Engineering - Torino
Objectives of the course
The course intends to provide a solid background and a sound knowledge of environmental phenomena related to light and acoustics,
especially with regard to their relationship with human perception. The aim is to give general information on the materials and
techniques used to control such phenomena and to enable students to define the light and acoustic qualities of the immediate
Teaching will be intended as an introduction to the course regarding comfort inside a motor vehicle.
The course is divided into three parts: the first is dedicated to the basic principles of lighting techniques, the second to acoustics and the
third to the princples of air conditioning.
A basic knowledge of physics, mathematics, thermodynamics and thermokinematics, acquired in first and second year modules, is
Physics of light: electromagnetic radiation and fundamental physical magnitudes.
Perception of light, photometric magnitudes (light flow, intensity, illumination, luminance).
Propagation of light and material properties.
Natural lighting: characteristics of natural light sources, daylight factors, requisites if natural lighting.
Artificial lighting of interiors and exteriors:
characteristics of artificial light sources, total flow method, exterior lighting, requisites of
artificial lighting for interiors and exteriors.
The physics of sound: sound waves and fundamental physical magnitudes.
Perception of sound, phonometric magnitudes (levels of pressure, intensity and power), evaluation of pure sounds, complex sounds and
Propagation of sound and material properties.
Environmental acoustics: phonic absorption and sound fields.
Soundproofing against aircraft noise and using structural techniques.
Psychrometry: general principles and applications. vProperties of humid air. Dalton's Law. Relative humidity and hygrometrics. Enthalpy
of humid air. Mollier's diagram of humid air (h, x) and its properties. Constant enthalpy, constant relative humidity, constant titre and
Typical transformations of humid air: cooling, warming, dehumidifying, mixing, humidifying.
Energy and mass balance for an air-conditioned environment. Load curve for air conditioning equipment. Inverse compression cycles
and inverse absorption cycles (introduction). System charts and transformation onto diagrams (log p, h). Introduction to inverse
transcritical compression cycles (CO2) and system charts and transformation onto diagrams (log p, h). Calculation of COP and of
specific cooling effects (introduction).
Introduction to thermodynamics applied to gas compression engines in air conditioning systems.
Internal Air Quality (IAQ): definitions and general notions. Indoor pollution sources away from industrial environments. General
ventilation systems: mass balance on the environment in the ideal event of perfect mixing. Ventilation scope necessary to guarantee
adequate levels of IAQ. Ventilation efficiency. Perceived air quality according to Fanger's theory.
Introduction to thermohygrometric well-being: conditions for thermohygrometric well-being according to Fanger's analysis: thermic flows
exchanged between the body and the environment. Definitions of met and clo. Average radiant temperature and operational temerature.
Predicted average score and average percentage of unsatisfactory results. Local discomfort.
Laboratories and/or exercises
Numerical exercises are foreseen in the class room related to the topics dealt with during the lessons.
Revisions / Exam
Written paper (exercises and theory) and an optional oral test.
Programma definitivo per l'A.A.2007/08