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Heat Transfer

Code: EM0037     Acronym: TC

Keywords
Classification Keyword
OFICIAL Heat Transfer and Fluid

Instance: 2020/2021 - 2S Ícone do Moodle

Active? Yes
Responsible unit: Fluids and Energy Division
Course/CS Responsible: Master in Mechanical Engineering

Cycles of Study/Courses

Acronym No. of Students Study Plan Curricular Years Credits UCN Credits ECTS Contact hours Total Time
MIEM 307 Syllabus since 2006/2007 3 - 6 58,5 162
Mais informaçõesLast updated on 2021-01-25.

Fields changed: Teaching methods and learning activities, Fórmula de cálculo da classificação final, Componentes de Avaliação e Ocupação, Melhoria de classificação, Tipo de avaliação, Avaliação especial

Teaching language

Portuguese

Objectives

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.

Learning outcomes and competences


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.



 



Working method

Presencial

Pre-requirements (prior knowledge) and co-requirements (common knowledge)

Basic knowledge on Mathematics and Algebra, Thermodynamics, Fluid Mechanics, Numerical Analysis.
Good understanding of differential equations and their integration. 

Program


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.

 


Mandatory literature

Bergman, T. L., Lavine, A. S., Incropera, F. P. and DEWitt, D. P.;; Fundamentals of heat and mass transfer, John Wiley and Sons, 2011. ISBN: 978-0470-50197-9 (most recent edition of the recommended text)
Docentes da disciplina; Enunciados de alguns exercícios tipo para apoio às aulas

Complementary Bibliography

Incropera Frank P.; Fundamentals of heat and mass transfer. ISBN: 978-0-471-45728-2 (6th edition available in FEUP library)
Incropera Frank P.; Fundamentos de transferência de calor e de massa. ISBN: 85-216-1146-3 (translation of the 5th edition (available at FEUP library))
Çengel, Yunus A.; Heat Transfer - A Practical Approach, McGraw Hill, 2002. ISBN: 0-07-011505-2
Rui Figueiredo, José Costa e António Raimundo; Transmissão de calor: Fundamentos e Aplicações, Lidel, 2015. ISBN: 978-972-757-983-9

Comments from the literature

Due to COVID19 all classes were held remotely after 12 March.
The evaluation method was altered, with the cancelation of lab activities and theoretical mini tests.
There will be only one final exam with a theoretical part (weight of 30%) and a practical part (weight of 70%).

Teaching methods and learning activities

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). 
Due to the COVID restrictions all classes will be tought through the web, according to the available timetables. The laboratory practice will be replaced by 2 online demonstrations which will be recorded and uploaded in the course web page.

 

keywords

Technological sciences > Engineering > Thermal engineering

Evaluation Type

Evaluation with final exam

Assessment Components

Designation Weight (%)
Exame 100,00
Total: 100,00

Amount of time allocated to each course unit

Designation Time (hours)
Estudo autónomo 108,00
Frequência das aulas 54,00
Total: 162,00

Eligibility for exams

All students duly registered will obtain frequency if attaining the minimum legal number of presences in the classes (pratical and laboratory sessions).

Calculation formula of final grade

Distributed evaluation with final exam.

One written exam with weight of 100%.

The resit exam is also a written test (100% weight). 

All exams/tests are exclusively in portuguese, that is, no english version (or in any other language) will be provided.

Examinations or Special Assignments

None.

Internship work/project

None.

Special assessment (TE, DA, ...)

Same as for the resit exam.

Classification improvement

Same as for the resit exam.

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