# APPLIED PHYSICS

OVERVIEW

The course aims to provide elements of engineering thermodynamics for the analysis of energy processes and of associated environmental issues.

Psychrometry and heat transfer are introduced and the relevant physical mechanisms are described.

Basic elements of acoustics and lighting are lastly given to the students.

## AIMS AND CONTENT

LEARNING OUTCOMES

Solution of simple energy problems. Evaluation of the effectiveness of direct and reverse cycles. Thermal and psychrometric calculations. Calculations concerning most air and air conditioning. Elementary issues in acoustics and lighting.

Teaching methods

Solution of simple energy problems. Evaluation of the effectiveness of direct and reverse cycles. Thermal and psychrometric calculations. Calculations concerning most air and air conditioning. Elementary issues in acoustics and lighting.

SYLLABUS/CONTENT

ENVIRONMENTAL ENGINEERING PHYSICS

**Engineering thermodynamics**: Introduction to energy issue: renewable and not renewable resources, energy needs and availability, environmental impacts. Energy transfer by heat. Energy transfer by work. State functions. Thermodynamic transformations. Ideal gas law and gas mixtures. Internal energy. First law of thermodynamics. Energy balance for control volumes. Second law of thermodynamics. Reversible and irreversible processes. Entropy. Pure substance. Thermodynamic planes: (p, T), (p,v), (T,S) (H, S), (p, H). Carnot theorem and cycle (direct and reverse). Energy conversion efficiency. Brayton cycle. Rankine cycle. Internal combustion cycles. Refrigeration cycle. Reverse cycle machines: refrigerator and heat pump. Refrigerants. Coefficient of performance. Absorption refrigeration system.

**Heat transfer**: Mechanisms of heat transfer. Thermal conduction. Fourier equation. Mono-dimensional problems. Thermal resistance. Transient thermal conduction. Forced convection. General principles and boundary layer. Dimensionless groups. Internal and external convection. Forced convention correlations. Natural convection. Forced and natural convention correlations. Radiative heat transfer. Black body. Planck’s and Wien’s laws. Emissivity and absorptivity. Legge di Kirchoff. Gray body. View factors. Lambert law. Radiation in black cavities. Radiation in gray cavities. Combined mechanisms of heat transfer. Overall heat transfer coefficient. Heat transfer in buildings.

TECHNICAL PLANTS

**Psychrometrics**: Thermodynamics of moist air. Psychometric functions and their relations. Fundamental transformations of moist air. Psychrometric diagrams. Psychrometric measurements. Surface and interstitial condensation. Thermohygrometric comfort. Buildings energy and mass balance. Air conditioning plants. Summer air conditioning. Winter air conditioning.

**Applied acoustics**: Wave-equation for sound propagation. Sound levels. Sound spectra. Sound propagation outdoors. Reflection, diffraction, refraction. Sound propagation in rooms. Acoustic reverberation. Conventional reverberation time.

**Lighting**: Fundamentals: luminous intensity, illuminance, luminance, flow. Sources of artificial light. Solid photometric. Illumination of a point by point source. Design of a maximum of lighting inside. Method of the utilization factor. Natural lighting method of the average daylight factor

RECOMMENDED READING/BIBLIOGRAPHY

- M. J. Moran, N. H. Shapiro “Fundamental of Engineering Thermodynamics”, John Wiley & sons, Inc.1988
- Yunus A. Cengel: “Termodinamica e trasmissione del Calore”, Mc Graw Hill, 1998
- C. Pisoni, G. Guglielmini “ Introduzione alla Trasmissione del Calore” Ed. CEA, 2001.
- F. Kreith, "Principi di trasmissione del calore", Liguori Editore, 1975.
- K.P. Incropera , D. P. DeWitt, T. L. Bergman, S. Lavine, ”Introduction to Heat Transfer”, Wiley, 2006.
- D. DiLaura, K.Houser, R. Mistrick, G. Steffy, IES Lighting Handbooh (Application Volume) – 10th Edition, 2014.
- G. Guglielmini, E. Nannei, C. Pisoni, “Problemi di Termodinamica Tecnica e trasmissione del Calore”, ECIG, 1993.
- IES Lighting Handbook (Application Volume), 1987
- F. A. Everest, Manuale di acustica, Hoepli, 1996.
- Lecture notes by the lecturer (Lecture notes are available on Aulaweb)

## TEACHERS AND EXAM BOARD

**Ricevimento:** Friday 11-13
Other dates by appointment to be arranged with the teacher

**Ricevimento:** By appointment to be agreed with the teacher.

**Ricevimento:** Friday 11-13
Other dates by appointment to be arranged with the teacher

**Ricevimento:** By appointment to be agreed with the teacher.

Exam Board

CORRADO SCHENONE (President)

DAVIDE BORELLI (President)

## LESSONS

Teaching methods

Solution of simple energy problems. Evaluation of the effectiveness of direct and reverse cycles. Thermal and psychrometric calculations. Calculations concerning most air and air conditioning. Elementary issues in acoustics and lighting.

LESSONS START

19th of September

## EXAMS

Exam description

Written test and oral questions about each general topic.

The exam consists of an oral part (ref. official calendar) by the students who attended lectures and class exercises, and who filled in the questionnaire for the quality of teaching. The oral test is preceded by a written test, aiming to verify an adequate level of knowledge for the solution of simple problems. Subjects of the written test are Engineering Thermodynamics, Heat Transfer, Psychrometry and A/C plants. The judgment is Positive or Negative;a student who does not pass the written test is recommended not to sit for the oral test. The validity of a positive written test is limited to the period between two following written examinations. Attendance at lectures and other forms of activities is mandatory and is awarded by students who have attended at least 70% of the teaching activity.

Exam schedule

Date | Time | Location | Type | Notes |
---|---|---|---|---|

04/06/2020 | 10:00 | GENOVA | Scritto | Le prove orali si terranno l'11 e il 25 giugno alle ore 9:30. |

04/06/2020 | 10:00 | GENOVA | Scritto | |

11/06/2020 | 09:30 | GENOVA | Orale | aula B5 |

25/06/2020 | 09:30 | GENOVA | Orale | aula B5 |

02/07/2020 | 10:00 | GENOVA | Scritto | Le prove orali si terranno il 16 e il 30 gennaio alle ore 9:30. |

02/07/2020 | 10:00 | GENOVA | Scritto | aula G3A |

09/07/2020 | 09:30 | GENOVA | Orale | aula B4 |

23/07/2020 | 09:30 | GENOVA | Orale | aula B5 |

09/09/2020 | 10:00 | GENOVA | Scritto | aula G3B |

09/09/2020 | 10:00 | GENOVA | Scritto | Le prove orali si terranno il 9 e il 23 luglio alle ore 9:30. |

17/09/2020 | 09:30 | GENOVA | Orale | aula B4 |

04/06/2020 | 10:00 | GENOVA | Scritto | Le prove orali si terranno l'11 e il 25 giugno alle ore 9:30. |

04/06/2020 | 10:00 | GENOVA | Scritto | |

11/06/2020 | 09:30 | GENOVA | Orale | aula B5 |

25/06/2020 | 09:30 | GENOVA | Orale | aula B5 |

02/07/2020 | 10:00 | GENOVA | Scritto | Le prove orali si terranno il 16 e il 30 gennaio alle ore 9:30. |

02/07/2020 | 10:00 | GENOVA | Scritto | aula G3A |

09/07/2020 | 09:30 | GENOVA | Orale | aula B4 |

23/07/2020 | 09:30 | GENOVA | Orale | aula B5 |

09/09/2020 | 10:00 | GENOVA | Scritto | aula G3B |

09/09/2020 | 10:00 | GENOVA | Scritto | Le prove orali si terranno il 9 e il 23 luglio alle ore 9:30. |

17/09/2020 | 09:30 | GENOVA | Orale | aula B4 |

## FURTHER INFORMATION

No formal prerequisites. Students are recommended to pass before the exams in Analisi Matematica 1, Geometria and Fisica Generale.