Themen der Lehrveranstaltung
The course belongs to the type "caratterizzanti". This course aims to introduce students to the fundamentals of engineering thermodynamics, to give an overview of the main thermodynamic processes and direct / indirect cycles, and to describe the main aspects of the different heat transfer mechanisms (conduction, convection, radiation), as well as their application to exchange and dissipate heat in mechanical and electrical systems. Students will learn theoretical concepts, acquire the ability to apply these concepts to some reference system calculations, using both analytical and advanced numerical simulation approaches. PART 1: Introduction, fundamentals, thermodynamic processes and cycles - Introduction to measurement theory: measurement and units, systems of measurement units, uncertainty - Fundamentals of thermodynamics: Thermodynamic systems/processes (non-flow/flow) and quantities (state and path functions); Work, heat, 0th law; First law and applications; Second law and applications - Operating fluids: ideal gas and phase-change fluids - Reference cycles (direct and reversed): vapour and gas cycles PART 2: Heat transfer - Heat transfer mechanisms: Conduction; Convection; Radiation - Global heat transfer: Mechanisms; Extended surfaces - Numerical methods for modelling heat transfer mechanisms

Unterrichtsform
The course includes (1) classroom lectures introducing theoretical concepts and (2) exercise classes providing numerical examples of technical applications. Lectures format includes blackboard and PowerPoint presentations, as well as videorecording and video-tutorials. As part of the exercise classes, visits and experimental activities in the Building Physics Labs at the NOI Techpark will be also organized. Course standard and additional teaching material will be available for the students through the MS Teams group.

Bildungsziele
Knowledge and understanding 1. Fundamentals of technical systems’ energy balance, thermodynamic processes and cycles. 2. Heat transfer mechanisms. Applying knowledge and understanding 3. Solution of energy balance problems, with quantification and assessment of exchanged mass and energy fluxes within and among physical systems. 4. Design and analysis of solutions to exchange heat and to dissipate heat generated in mechanical and electrical systems. 5. Use of analytical and numerical methods to solve heat transfer problems. Making judgements 6. Making judgments through the acquisition of the basics of the thermodynamic analysis of complex systems. 7. Comparison and selection of different solutions to exchange, transfer and dissipate heat in mechanical and electrical systems. Communication skills 8. Correct use of technical terms and definitions, including the correct use and conversion of the units of measurement. Ability to learn 9. Lifelong learning skills through the comparison of different sources, and engineering methods and the acquisition of a critical sense.

Art der Prüfung
The assessment is subdivided into three parts (two written parts + a numerical simulation report): 1. (written) numerical exercise: the first part deals with the solution of a numerical exercise related to the calculation of energy balance and exchanges of the technical systems considered in the course. Through this numerical exercise, I will assess the ability of the student of applying the knowledge and understanding of the analysis and solution techniques, and of making judgment and to correctly use the units of measurement. 2. (written) theoretical exam: the second part consists of some open questions dealing with theoretical aspects of each main topic of the course (engineering thermodynamics, heat transfer). Through the theoretical written exam, I will assess the knowledge and understanding of the fundamental topics, as well as the communication skills. 3. Numerical simulation report: a report on a numerical simulation on a heat transfer problem (PC simulations), which can be developed during the course and must be delivered before the exam date. Through this numerical simulation report, I will assess the ability of the student of applying the knowledge, his/her/their communication skills, as well as his/her/their ability to learn. - Formative assessment: 25% numerical simulation report: during the course; ILOs assessed: (4), (5), (8), (9); - Summative assessment: 30% numerical exercise: 1 exercise (1 hour); ILOs assessed: (3), (4), (5), (6), (7); 45% theoretical exam: 2 open-ended questions (1.5 hours); ILOs assessed: (1), (2), (8).

Bewertungskriterien
Evaluation criteria and criteria for awarding marks The first part (numerical exercise) consists of an exercise with six numerical questions. The answer is correct when the number provided is within a given tolerance with respect to the reference value. Each student works on the same problem but with personal starting data. The evaluation is based on the accuracy of the numerical result of each question. The starting mark is assigned considering 3 points per each correct answer (starting from 12). The score of this part contributes for 30 % to the final mark. In the second part (theoretical written exam), each of the two proposed questions concerns a different part of the program (applied thermodynamics and heat transfer). The evaluation is based on the completeness of the answer in terms of 1) definition of the subject 2) analytical description 3) graphical and mathematical representations 4) proof (if required). The score of this second part contributes for 45 % of the final mark. The third part (numerical simulation report) consists of a short report on numerical heat transfer simulations performed to solve a problem with advanced numerical methods which will be taught during the course. Instructions for numerical simulations and assignment on the heat transfer problem to solve will be given during the course. The report has to be delivered before the exam date. Its assessment will focus on (1) completeness of the adopted numerical assumptions, (2) clarity of the presented results, (3) correctness of units of measurements. The score of this third part contributes for 25 % of the final mark. Each part must be successfully passed (mark at least equal to 18).

Pflichtliteratur

Lessons and slides of the course.

Weiterführende Literatur

• G.F.C. Rogers, Yon Mayhew. Engineering Thermodynamics: Work and Heat Transfer (4th Editionor later) Pearson Education (1996)
• F. Incropera, D. DeWitt. Fundamentals of Heat and Mass Transfer (5th Edition/or later), Wiley (2002)
• S. V. Patankar. Numerical Heat Transfer and Fluid Flow, CRC Press (2009)
• H.D. Baehr, K. Stephan. Heat and Mass Transfer, Springer (2006)

Subject Librarian: David Gebhardi, David.Gebhardi@unibz.it and Ilaria Miceli, Ilaria.Miceli@unibz.it

Weitere Informationen
Software used: ANSYS Mechanical APDL.