Code: | EM0037 | Acronym: | TC |
Keywords | |
---|---|
Classification | Keyword |
OFICIAL | Heat Transfer and Fluid |
Active? | Yes |
Responsible unit: | Fluids and Energy Division |
Course/CS Responsible: | Master in Mechanical Engineering |
Acronym | No. of Students | Study Plan | Curricular Years | Credits UCN | Credits ECTS | Contact hours | Total Time |
---|---|---|---|---|---|---|---|
MIEM | 371 | Syllabus since 2006/2007 | 3 | - | 6 | 58,5 | 162 |
To understand the mechanisms and modes of heat transfer and to identify the corresponding governing fundamental equations. The focus is on the comprehension of the physical phenomena, and their modelling through simplified mathematical models. Another objective is to provide a first contact with heat transfer experimental techniques.
Competences: to be able to perform qualitative and quantitative analyses in cases where relatively simple analytical solutions or simplified correlations exist. To use quantitative analysis tools in design situations, through the use of supporting calculation means.
Resultados da aprendizagem e competências: ability to use the knowledge in the design of engineering thermal systems, valuing the approach to energy conversion processes and opportunities for the environmentally-friendly use of thermal energy.
Basic knowledge on Mathematics and Algebra, Thermodynamics, Fluid Mechanics, Numerical Analysis.
Good understanding of differential equations and their integration.
1. Introduction to Heat Transfer mechanisms and modes: difference between the Heat Transfer and the Thermodynamics approaches; simple cases of conduction, convection and radiation; notion of thermal resistance.
2. Conduction: Fourier equation; thermal conductivity and difusivity; general conduction equation; steady unidimensional conduction (plane wall, cylinder and sphere, without and with internal generation, fins); brief introduction to numerical solutions for multidimensional steady conduction; transient conduction (global system, unidimensional analytical solutions for plane wall, cylinder and sphere).
3. Convection: energy equation for fluid flow; dimensionless numbers; convection coefficient; internal and external flows and their correlations; natural convection in simple geometries (plate, cylinder, rectangular cavity) and correlations.
4. Phase change: film condensation outside plane walls and tubes, and their correlations; pool boiling, regimes and correlations.
5. Radiation: eletromagnetic and thermal radiation; fundamental concepts; black body and its properties; radiative properties of materials; radiation exchanges in a non-participating media (radiosity, view factor and balances); combined radiation and convection; radiation shields; electrical analogy and its limitations.
6. Heat exchangers: types and geometry; mean log temperature difference and efficiency; efficiency-NTU relationships for different geometries.
Theioretical sessions to explain the concepts and equations, and analyse practical examples (two weekly sessions of 1.5 h each).
Practical (problem solving) sessions to address the resolution of typical problems (one weekly session semanal of 1.5 h).
Laboratory practice to introduce experimental heat transfer (two group visits/works during the semester each with a duration of 2 h).
Designation | Weight (%) |
---|---|
Exame | 60,00 |
Teste | 30,00 |
Trabalho laboratorial | 10,00 |
Total: | 100,00 |
Designation | Time (hours) |
---|---|
Estudo autónomo | 108,00 |
Frequência das aulas | 54,00 |
Total: | 162,00 |
All students duly registered will obtain frequency if attaining the minimum legal number of presences in the classes (pratical and laboratory sessions).
Distributed evaluation with final exam.
Two moodle theoretical mini-tests during the semester with a weight of 15% each, plus final written practical exam with weight of 60%, and the evaluation of the two laboratorial works each with a weight of 5%. The access to the final exam requires an average mark of 6.0/20.0 on the two moodle tests.
Resit exam is for the whole subject matter and is also composed of a theoretical moodle test (30% weigth) and a written practical test (60% weight), where the access to the written test requires a mark of 6.0/20.0 in the corresponding moodle test. The laboratorial component must have been previously assessed, or the student will loose 10% of the final mark.
All exams/tests are exclusively in portuguese, that is, no english version (or in any other language) will be provided.
None.
None.
Same as for the resit exam.
Same as for the resit exam.