TECHNICAL PHYSICS II
Academic year and teacher
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- Versione italiana
- Academic year
- 2017/2018
- Teacher
- MICHELE BOTTARELLI
- Credits
- 6
- Didactic period
- Secondo Semestre
- SSD
- ING-IND/10
Training objectives
- The course is second of the three courses about Applied Physics, and focus on acoustic, thermodynamics and fluid dynamics, as regarding the MD in Architecture.
The main knowledges are:
- characterization of the acoustic phenomenon (parameters, regulation, monitoring)
- methods to control and reduce the noise indoor and outdoor
- basics of thermodynamics
- thermodynamics cycles, with regard of the most important cycles for air conditioning and exploitation of renewable energies
- basic methods and strategies in air conditioning
- hydrostatics and hydrodynamics
The main skills are expertise in:
- noise control
- energy balance
- energy performance of thermodynamics cycles
- heat pump systems, in air, water and ground applications
- airt treatment for air conditioning
- hydraulic loops Prerequisites
- Mathematical analysis, differential calculus and mechanics are the main knowledges to support the attend lectures.
Therefore, students must have already taken examinations of Technical Physics 1 and Mathematics. Course programme
- Part 1: ACOUSTICS (20 hours)
Basic acoustical concepts and variables. Plane and spherical waves propagation. Waves equation. 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 (NRC). Panel sound absorber. Mass low. Helmholtz device.
Part 2: THERMODYNAMICS & FLUID DYNAMICS (40 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 (Kelvin & Clausius terms). Reversible process. Carnot cycle and its efficiency. Ideal versus real thermal machines. The thermodynamic temperature. Thermometers. Entropy and Clausius inequality.
Outlines of thermodynamics cycles (Brayton, Rankine, refrigeration cycle, heat pumps). Renewable energy exploitation by heat pumps.
Air water vapour mixture. Humidity control in air flow for air conditioning
Outlines of fluids dynamics (Newton, viscosity, laminar & turbulent flow, hydraulic head loss) Didactic methods
- Lectures assisted by Powerpoint slides projection, practical exercises and monitoring system are the main methods to present topics and apply on them.
The blackboard is still considered functional to support the understanding of the matter, even if all topics are available on slides. Learning assessment procedures
- Practical written tests for every part are carried out during the course. Tests are reserved to the students on the academic year running.
The result of every part is then weighted, according the number of hours (1/3 Acustics; 2/3 Thermodynamics-Fluid dynamics).
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. 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
Draft notes available on the course website
Part 2
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
