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Nuclear engineering lab and advanced heat transfer problems

01TWSND

A.A. 2020/21

2020/21

Nuclear engineering lab and advanced heat transfer problems

The course is logically divided in two parts: one is more related to the development of a hands-on attitude for some nuclear-relevant measurements; the second is more theoretical, and related to the problem of removing high heat fluxes from nuclear components.

Nuclear engineering lab and advanced heat transfer problems

The course is logically divided in two parts: 1) A part related to the development of a basic theoretical knowledge and some practical skills that would be needed to face the important technical problems in the experimental measurements of the main physical quantities in the energetic and nuclear field; 2) A part related to the problem of removing high heat fluxes from nuclear components, with particular reference to the active cooling by fluids in single-phase, turbulent regime considering the different peculiarities of Prandtl number ranging <1 (liquid metals), ~ 1 (air or He), or >1 (water, molten salts), as well as to the multi-phase flow (liquid/vapor or liquid/solid matrix in a porous medium) .

Nuclear engineering lab and advanced heat transfer problems

The students are expected to become aware of techniques and issues in the experiments that concern single phase and two phase pressure drop and heat transfer, and the characterization of materials in nuclear environment, relevant for fission and fusion applications. Furthermore, the acquisition of critical capability to model components or systems characterized by the need for removal of high heat fluxes is expected.

Nuclear engineering lab and advanced heat transfer problems

The students are expected to understand, design and carry on experimental activities that concern single phase and two-phase pressure drop and heat transfer, and the characterization of materials in nuclear environment, relevant for fission and fusion applications. Furthermore, the students are expected to become capable to design and analyze complex components characterized by the need for removal of high heat fluxes, using analytical and numerical tools.

Nuclear engineering lab and advanced heat transfer problems

Knowledge of thermo-dynamics, single-phase thermal-fluid dynamics, advanced materials for nuclear applications, basic knowledge of operating principles of fission and fusion nuclear reactors. Basic knowledge of programming (in MATLAB) is welcome.

Nuclear engineering lab and advanced heat transfer problems

Knowledge of thermo-dynamics, single-phase thermal-fluid dynamics, advanced materials for nuclear applications, basic knowledge of operating principles of fission and fusion nuclear reactors. Basic knowledge of programming (in MATLAB) is welcome.

Nuclear engineering lab and advanced heat transfer problems

1. Fundamentals of measurement instruments and signal analysis (17h lectures + 3h lab) a. International System of Measurements (SI) b. Measurement Methods and Experimental Errors c. System Dynamic Models (zero, first and second order) and Fourier analysis d. Basic Electrical Principles (Electrical Components, Bode Plot, Bridges, Amplifiers, Analogical and Numerical Filters) 2. Hydraulic characteristics for components in incompressible and compressible flows: mass and momentum conservation equations in single-phase and two-phase flow. (9h lectures + 6h lab) 3. Thermal-Hydraulic characteristics for components in single-phase flow: enhanced heat transfer in turbulence promoters, finned surfaces, porous media, ... Applications to devices of interest in nuclear applications (10.5h lectures + 9h lab) 4. Thermal-Hydraulic characteristics for components in two-phase flow: the modeling of boiling, condensation and critical heat flux (12h lectures + 4.5h lab) 5. Problems of heat transfer for superconducting materials at cryogenic temperatures and measurements (4.5h lectures + 4.5h lab)

Nuclear engineering lab and advanced heat transfer problems

1. Fundamentals of measurement instruments and signal analysis (14 h lectures + 6 h lab) a) System Dynamic Models (zero, first and second order) and Fourier analysis b) Digital Acquisition System c) Analogical and Digital Filters d) Laboratory 2. Removal of high heat fluxes by single-phase turbulent flow: a) Mass, momentum and energy conservation laws for turbulent flow (12 h) b) Heat removal by fluids with Prandtl number <1: liquid metals (3 h) c) Heat removal by fluids with Prandtl number ~1: Helium and air (6 h) d) Heat removal by fluids with Prandtl number ~1: Molten salts (3 h) e) Multi-scale and multi-physics modeling of advanced heat transfer problems: the case of superconducting magnets Current Leads (3 h) 3. Removal of high heat fluxes by multi-phase flow: a) Conservation laws for a liquid/vapor mixture (15 h) b) Conservation laws in a porous medium (3 h) 4. Nuclear engineering Lab: a) Measuring the critical current in Superconducting tapes: (3 h lab) b) Numerical modeling of 3D heat transfer problems using the commercial software STARCCM+ (12 h)

Nuclear engineering lab and advanced heat transfer problems

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Nuclear engineering lab and advanced heat transfer problems

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Nuclear engineering lab and advanced heat transfer problems

The course will be organized in room lectures and hands-on experimental and computational lab sessions.

Nuclear engineering lab and advanced heat transfer problems

The course will be organized in room lectures and hands-on experimental and computational lab sessions.

Nuclear engineering lab and advanced heat transfer problems

Notes by the teachers. In addition: • Boiling, condensation and gas- liquid flow, P.B. Whalley, Clarendon, Oxford, 1987 • Convective boiling and condensation, John G. Collier, John R. Thome, 3rd ed., Clarendon, Oxford, 1996

Nuclear engineering lab and advanced heat transfer problems

Notes by the teachers. In addition: • Boiling, condensation and gas- liquid flow, P.B. Whalley, Clarendon, Oxford, 1987 • Convective boiling and condensation, John G. Collier, John R. Thome, 3rd ed., Clarendon, Oxford, 1996

Nuclear engineering lab and advanced heat transfer problems

Modalità di esame: Prova orale obbligatoria; Prova scritta tramite l'utilizzo di vLAIB e piattaforma di ateneo Exam integrata con strumenti di proctoring (Respondus). ; Elaborato progettuale individuale;

Nuclear engineering lab and advanced heat transfer problems

Concerning the first part of the course, a written exam will checks the student knowledge about the capability of selecting a proper transducer in accordance to the characteristics of the physical quantity under investigation, and of configuring the acquisition chain and set the acquisition parameters. The written exam, contributing to the 25% of the final mark, will be divided in two parts, for a total duration of 50 min: - 1st part (15/30): The student has to answer to 5 multiple choice questions (MCQ). 2 MCQs concern to the practical activities developed in the laboratory and 3 MCQs are related to the topics discussed in the lectures. The MCQs can provide more than one correct answers. The evaluation of the MCQ is performed in accordance to the following rules: . +3 points when all the correct answers are selected; 0 points when none or all the answers are selected; -3 points when all the incorrect answers are selected. When a mixed selection of correct and incorrect answers is provided, the evaluation if performed in accordance to the above rules. - 2nd part (mark 15/30): the student has to solve 1 exercise regarding the DAQ setup. For the second part of the course, an individual project will be carried out and presented through a written report: the teachers will evaluate the methodology used to develop the project, its originality and feasibility. The project contributes to the 50% of the final mark. The compulsory oral exam, based on open questions on the course topics and discussion of the project, will allow students to round their score to the maximum.

Nuclear engineering lab and advanced heat transfer problems

Exam: Compulsory oral exam; Written test via vLAIB using the Exam platform and proctoring tools (Respondus).; Individual project;

Nuclear engineering lab and advanced heat transfer problems

Concerning the first part of the course, a written exam will checks the student knowledge about the capability of selecting a proper transducer in accordance to the characteristics of the physical quantity under investigation, and of configuring the acquisition chain and set the acquisition parameters. The written exam, contributing to the 25% of the final mark, will be divided in two parts, for a total duration of 50 min: - 1st part (15/30): The student has to answer to 5 multiple choice questions (MCQ). 2 MCQs concern to the practical activities developed in the laboratory and 3 MCQs are related to the topics discussed in the lectures. The MCQs can provide more than one correct answers. The evaluation of the MCQ is performed in accordance to the following rules: . +3 points when all the correct answers are selected; 0 points when none or all the answers are selected; -3 points when all the incorrect answers are selected. When a mixed selection of correct and incorrect answers is provided, the evaluation if performed in accordance to the above rules. - 2nd part (mark 15/30): the student has to solve 1 exercise regarding the DAQ setup. For the second part of the course, an individual project will be carried out and presented through a written report, to be uploaded on the course website: the teachers will evaluate the methodology used to develop the project, its originality and feasibility. The project contributes to the 50% of the final mark. The compulsory oral exam, based on open questions on the course topics and discussion of the project, will allow students to round their score to the maximum.

Nuclear engineering lab and advanced heat transfer problems

Modalità di esame: Prova orale obbligatoria; Prova scritta a risposta aperta o chiusa tramite PC con l'utilizzo della piattaforma di ateneo Exam integrata con strumenti di proctoring (Respondus); Prova scritta tramite l'utilizzo di vLAIB e piattaforma di ateneo Exam integrata con strumenti di proctoring (Respondus). ; Elaborato progettuale individuale;

Nuclear engineering lab and advanced heat transfer problems

Concerning the first part of the course, a written exam will checks the student knowledge about the capability of selecting a proper transducer in accordance to the characteristics of the physical quantity under investigation, and of configuring the acquisition chain and set the acquisition parameters. The written exam, contributing to the 25% of the final mark, will be divided in two parts, for a total duration of 50 min: - 1st part (15/30): The student has to answer to 5 multiple choice questions (MCQ). 2 MCQs concern to the practical activities developed in the laboratory and 3 MCQs are related to the topics discussed in the lectures. The MCQs can provide more than one correct answers. The evaluation of the MCQ is performed in accordance to the following rules: . +3 points when all the correct answers are selected; 0 points when none or all the answers are selected; -3 points when all the incorrect answers are selected. When a mixed selection of correct and incorrect answers is provided, the evaluation if performed in accordance to the above rules. - 2nd part (mark 15/30): the student has to solve 1 exercise regarding the DAQ setup. For the second part of the course, an individual project will be carried out and presented through a written report: the teachers will evaluate the methodology used to develop the project, its originality and feasibility. The project contributes to the 50% of the final mark. The compulsory oral exam, based on open questions on the course topics and discussion of the project, will allow students to round their score to the maximum.

Nuclear engineering lab and advanced heat transfer problems

Exam: Compulsory oral exam; Computer-based written test with open-ended questions or multiple-choice questions using the Exam platform and proctoring tools (Respondus); Written test via vLAIB using the Exam platform and proctoring tools (Respondus).; Individual project;

Nuclear engineering lab and advanced heat transfer problems

Concerning the first part of the course, a written exam will checks the student knowledge about the capability of selecting a proper transducer in accordance to the characteristics of the physical quantity under investigation, and of configuring the acquisition chain and set the acquisition parameters. The written exam, contributing to the 25% of the final mark, will be held either in person or remotely through Respondus/VLAIB. It will be divided in two parts, for a total duration of 50 min: - 1st part (15/30): The student has to answer to 5 multiple choice questions (MCQ). 2 MCQs concern to the practical activities developed in the laboratory and 3 MCQs are related to the topics discussed in the lectures. The MCQs can provide more than one correct answers. The evaluation of the MCQ is performed in accordance to the following rules: . +3 points when all the correct answers are selected; 0 points when none or all the answers are selected; -3 points when all the incorrect answers are selected. When a mixed selection of correct and incorrect answers is provided, the evaluation if performed in accordance to the above rules. - 2nd part (mark 15/30): the student has to solve 1 exercise regarding the DAQ setup. For the second part of the course, an individual project will be carried out and presented through a written report, to be uploaded on the course website: the teachers will evaluate the methodology used to develop the project, its originality and feasibility. The project contributes to the 50% of the final mark. The compulsory oral exam, to be held either in person or remotely, based on open questions on the course topics and discussion of the project, will allow students to round their score to the maximum.

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