APPLIED PHYSICS FOR INDUSTRIAL DESIGN
Academic year and teacher
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- Versione italiana
- Academic year
- 2019/2020
- Teacher
- MICHELE BOTTARELLI
- Credits
- 6
- Didactic period
- Primo Semestre
- SSD
- ING-IND/10
Training objectives
- The course is focused on fundamentals of acoustics, thermodynamics and heat transfer, as regarding the product design.
The main knowledges are:
- Acoustics characterization
- Noise control
- Thermodynamics
- Thermodynamics cycles, with regard of renewable energies exploitation
The main skills are expertise in:
- knowledge of physics fundamentals
- expertise in modelling real problems according the skills acquired
- skill in designing by a quantitative approach Prerequisites
- No prerequisites are required
Course programme
- Lectures are organized in three parts: acoustics, thermodynamics, heat transfer.
Part 1: ACOUSTICS (12 hours)
Basic acoustical concepts and variables. Sound energy and intensity. Sound pressure and sound levels. Frequency analysis in half octave shift, critical frequency band. Human ear and its response to sound pressure level. Isophonic filters. A-weighted equivalent continuous noise level. Sound sources and outdoor sound propagation, geometrical spreading, directivity index, excess attenuation factor, air absorption, shielding by barriers. Fresnel number and Maekawa equation. The traffic noise, impact and model formulation. Control sound in enclosed spaces. Acoustic insulation and adsorption. Sabine and Eyring formulations. Reverberation time method for the measurement of the constant room. Open, semi and full reverberant field. Low/high frequency behaviour. Acoustical properties of porous material. Panel sound absorber. Mass low and acoustic insulation.
Part 2: THERMODYNAMICS (18 hours)
Concepts and definitions used in thermodynamics. Work and heat. The first law of thermodynamics, internal energy, enthalpy, specific heat. Ideal and real gases. Thermodynamic diagrams. First-law analysis for turbines, compressors, pumps, valves. The second law of thermodynamics. Reversible process. Carnot cycle and its efficiency. Ideal versus real thermal machines. Outlines of thermodynamics cycles (Brayton, Stirling, Rankine, refrigeration cycle, heat pumps). Renewable energy exploitation by heat pumps.
Air water vapour mixture. Humidity control in air flow.
Part 3: HEAT TRANSFER (18 hours)
Conduction in solids. Heat conductivity. Natural and forced convection heat transfer. Radiation. Emissivity, Reflectivity. Black body, gray body. Solar radiance. Heat transfer control by phenomenon: low thermal conductivity, phase change, natural/forced ventilation, reflectivity. Didactic methods
- Lectures assisted by Powerpoint slides projection, practical exercises and monitoring systems for testing are the main methods to present topics and apply on them.
Experimental tests will be proposed to approach some physic concepts.
The blackboard is still considered functional to support the understanding of the matter, even if all topics are available on slides.
The use of numerical models is also proposed to approach complex problems. Learning assessment procedures
- Practical written tests for every part are carried out during the course. Tests are reserved to the attending students.
The result of every part is then weighted, according the number of hours (20% ACOUSTIC; 40% thermodynamics; 40% HEAT TRANSFER).
A positive result can be directly registered as final vote, or is preparatory to a final oral examination, on request of the student.
In any other case, the vote is acquired in an oral examination on the full programme, as practical application of the theory.
(Italian or English on request) Reference texts
- Part 1
Leland K. Irvine, Roy L. Richards, Acoustics and Noise Control Handbook for Architects and Builders, Krieger Pub Co
David A. Bies, Colin H. Hansen, Engineering Noise Control: Theory and Practice, CRC Press
D. Halliday, R. Resnick, Fundamentals of Physics,
Draft notes available on the course website
Part 2-3
Yunus A. Cengel, Michael A. Boles, Thermodynamics: An Engineering Approach Mc Graw Hill New York
Yunus A. Cengel, John Cimbala, Fluid Mechanics Fundamentals and Applications Mc Graw Hill New York
Draft notes available on the course website
