The course, which is part of the "Rational use of energy and Thermal system design" curriculum, aims at providing the principles and techniques required to develop the design of a Heating, Ventilating, and Air Conditioning (HVAC) system serving a residential, tertiary or industrial building, and of its mechanical components. The course is oriented towards practical applications and includes a design exercise concerning the HVAC system of a tertiary building.

At the end of the course, students will acquire the following expertise: - Knowledge of the design data of the system, of the methods for the calculation of thermal loads (with reference to applicable technical standards), of the constructive and performance characteristics of the equipment and systems used for HVAC, of the principles of safety, reliability, energy efficiency and environmental impact in the operation of HVAC systems; - Ability to identify the system typologies suitable for a given application and to define the system operation and control logics; - Ability to size, or select from catalogues, the main components and subsystems of the plant; - Ability to present the design results with a technical report and graphical representation (plans, sections, functional schemes, etc.).

The student should know the fundamental concepts of Thermodynamics, Heat Transfer, and Fluid Mechanics, taught in introductory courses offered in Bachelor’s programs in the Industrial Engineering area.

• Structure of HVAC systems. Subjects involved in the design, construction, and operation of the systems. Presentation of the design practice (Lecture 4.5 h – Practice 1,5 h) • Design data. Calculation of heating and cooling loads (Lecture 4.5 h – Practice 6 h) • HVAC system typologies. Constructive and performance characteristics, typical applications, design criteria (Lecture 6 h – Practice 6 h) • Characteristics, design and control of air distribution systems (Lecture 4.5 h – Practice 6 h) • Technologies for particulate and gas phase air contamination control (Lecture 6 h) • Characteristics, design and control of water systems (Lecture 4.5 h – Practice 6 h) • Heating and cooling central plants. Integration of renewable energy sources. Block diagrams (Lecture 6 h – Practice 4,5 h) • Design practice final review (6 h) • Instruction visits (9 h)

The course consists of theory lectures and practical sessions on the quantitative aspects of HVAC system design. Students will also particpato to instruction visits to systems that represent the state of the art from the point of view of typologies and technical solutions. Students are asked to develop, in groups of 2-3, a practical design assignment concerning the HVAC system of a tertiary building. The practice includes the definition of the design data, the calculation of the heating and cooling loads, the selection of system typologies, the sizing of the fluid distribution networks, the selection of the main system components, and the development of the block diagram / functional scheme of the system. The final product of the assignment includes the calculation report and the graphical representation of the system (plans and sections in a suitable scale, block diagram of the system).

Teaching material (lecture notes, presentations, article of law, standards, technical documentation, material for the design exercise) is made available through the Portal. Reference bibliography Books: C. Pizzetti. “Condizionamento dell’aria e Refrigerazione. Teoria e calcolo degli impianti”. Ed. CEA. G. Alfano, M. Filippi, E. Sacchi. “Impianti di climatizzazione per l’edilizia. Dal Progetto al Collaudo”. Ed. CEA. N. Rossi “Manuale del Termotecnico”. Ed. Hoepli. L. Stefanutti (a cura di) “Manuale degli impianti di climatizzazione” (2 volumi). Ed. Tecniche Nuove. L. Stefanutti, “Impianti di climatizzazione”. Ed. Tecniche Nuove. ASHRAE “Principles of Heating, Ventilating, and Air Conditioning” “ASHRAE Handbook” (4 volumi). Periodicals: AICARR Journal (organo ufficiale dell’AICARR) La Termotecnica, (organo ufficiale dell’ATI) RCI, Ed. Tecniche Nuove ASHRAE Journal (organo ufficiale dell’ASHRAE)

Modalità di esame: Prova scritta (in aula); Prova orale obbligatoria; Progetto di gruppo;

Exam: Written test; Compulsory oral exam; Group project;

... The final exam consists of two parts: • Individual, 2 hours open-book written test, which consists of the solution of a numerical exercise and the comment to the block diagram of a technical system; each of the above questions are graded on a 1-30 scale. In this test, the student should demonstrate both the ability to rapidly set up and develop a simple system sizing calculation, and the ability to understand the structure and operational logics of a technical system, through the interpretation of its block diagram. • Group oral exam, approximately 30 minutes long, in which the entire group illustrates in detail the practical design exercise developed. At the end of the discussion, the practice receives a grade on a 1-30 scale; all students in the group receive the same grade. In this part of the exam, students should demonstrate their ability to apply all the knowledge and abilities listed in the EXPECTED LEARNING section. There are no temporal constraints in the sequence of the written and oral parts of the exam. The final grade is calculated as the weighted average of each individual part, applying the following percentages: • Exercise (written test): 20% • Schematic diagram (written test): 30% • Practice (oral): 50%

Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.