Heat Transfer

Recommended Prerequisites

Termodynamics, Applied Thermodynamics, Fluid Mechanics I, (II).

Teaching Methods

The lectures are essentially driven by the exposure of the subjects in Powerpoint slides, including the presentation of short examples on the subject.

The practical classes are devoted to the interactive analysis and solving of practical problems for application of the theoretical knowledge.

Methods of assessment:

- 2 Midterm exams;

- Exam.

Learning Outcomes

In this course, the student learns to distinguish the different mechanisms of heat transfer – conduction, convection and radiation – as well as its occurrence and relevance in a variety of problems within the scope of thermal engineering.

The student develops skills for quantifying the rates of heat transfer in thermal processes, based on the fundamental laws of the different modes of transmission of heat, often combined with energy balances.

Work Placement(s)

No

Syllabus

Modes of heat transfer and their fundamental equations. Heat balance in a control volume and in a control surface.

Thermal conduction in steady state: simple and composite plane walls. Cylindrical composite systems. Thermal resistances. Analogy between thermal and electrical circuits. Critical radius of insulation.

Transient heat conduction: lumped capacitance method; bodies with significant internal thermal resistance.

Thermal convection: concepts of boundary layers, laminar and turbulent flow regimes, forced and natural convection. Dimensionless parameters. Empirical correlations for determining the convection coefficient.

Thermal radiation: the radiation spectrum. Fundamental concepts and laws. Coefficients of distribution of the incident radiation. Black body, emissivity. Gray and real surfaces. Direct radiation exchanges: view factors, radiosity. Direct thermal radiation exchange between the surfaces of a confined space, containing a transparent medium.

Head Lecturer(s)

Miguel Rosa Oliveira Panão

Assessment Methods

Final Assessment
Exam: 100.0%

Continous Assessment
Frequency: 100.0%

Bibliography

- Y. A. Çengel, Transferência de Calor e Massa - Uma abordagem prática. McGrawHill, 3ª ed., 2009.

- F.P. Incropera, D.P. DeWitt, T. L. Bergman and A.S. Lavine, Fundamentals of Heat and Mass Transfer, John Wiley & Sons, 6ª ed., 2007.

- F.P. Incropera and D.P. DeWitt, Fundamentos de Transferência de Calor e de Massa, LTC Ed., 4ªed., 1998.

- M.J. Moran, H.N. Shapiro, B.R. Munson and D.P. DeWitt, Introduction to Thermal Systems Engineering: Thermodynamics, Fluid Mechanics, and Heat Transfer, John Wiley & Sons, 2003.

- F. Kreith, Principles of Heat Transfer, McGraw-Hill, 1986.

- A. R. Figueiredo, J. J. Costa e A. M. Raimundo. Apontamentos de Transmissão Calor.