Educational guide
IDENTIFYING DATA 2024_25
Subject HEAT AND ELECTROMAGNETISM Code 00708007
Study programme
0708 - GRADO EN INGENIERÍA MECÁNICA
Descriptors Credit. Type Year Period
6 Basic Training First Second
Language
Castellano
Prerequisites
Department QUIMICA Y FISICA APLICADAS
Coordinador
ESTEVEZ MAURIZ , LAURA
E-mail lestm@unileon.es
fjtrac@unileon.es
cblaa@unileon.es
Lecturers
TRAPOTE DEL CANTO , FRANCISCO JAVIER
BLANCO ALEGRE , CARLOS DEL
ESTEVEZ MAURIZ , LAURA
Web http://agora.unileon.es/login/index.php
General description This freshman-level course is an introduction to thermodynamics and electromagnetism.
Tribunales de Revisión
Tribunal titular
Cargo Departamento Profesor
Presidente QUIMICA Y FISICA APLICADAS FRAILE LAIZ , ROBERTO
Secretario QUIMICA Y FISICA APLICADAS LOPEZ CAMPANO , LAURA
Vocal ING.ELECTR.DE SIST. Y AUTOMATI SERRANO LLAMAS , ESTEBAN
Tribunal suplente
Cargo Departamento Profesor
Presidente QUIMICA Y FISICA APLICADAS MARCOS MENENDEZ , JOSE LUIS
Secretario QUIMICA Y FISICA APLICADAS PALENCIA COTO , COVADONGA
Vocal ING.ELECTR.DE SIST. Y AUTOMATI BLANES PEIRO , JORGE JUAN

Competencias
Code  
A18156
B5634
B5635
B5643
B5644
B5646
B5647
B5651
C1 CMECES1 That students have demonstrated possession and understanding of knowledge in an area of study that is based on general secondary education, and is usually found at a level that, although supported by advanced textbooks, also includes some aspects that involve knowledge from the cutting edge of their field of study
C2 CMECES2 That students know how to apply their knowledge to their work or vocation in a professional manner and possess the skills that are usually demonstrated through the development and defense of arguments and the resolution of problems within their area of study.
C4 CMECES4 That students can transmit information, ideas, problems and solutions to both a specialised and non-specialised audience
C5 CMECES5 That students have developed those learning skills necessary to undertake further studies with a high degree of autonomy

Learning aims
Competences
A18156
B5634
B5635
B5643
B5644
B5646
B5647
B5651
C1
C2
C4
C5
A18156
B5634
B5635
B5643
B5644
B5646
B5647
B5651
C1
C2
C4
C5
A18156
B5634
B5635
B5643
B5644
B5646
B5647
B5651
C1
C2
C4
C5
A18156
B5634
B5635
B5643
B5644
B5646
B5647
B5651
C1
C2
C4
C5

Contents
Topic Sub-topic
HEAT TRANSFER 1: INTRODUCTION.
Units of the international system. Thermodynamics and heat transfer. First Law of Thermodynamics. Principles of calorimetry. Energy balances.

2: HEAT TRANSFER MECHANISMS
Heat transfer: Conduction.
Conduction: Fourier's Law.
Thermal conductivity.
Thermal conductivity mechanisms.
Thermal diffusivity.
Heat transfer: Convection.
Types of convection.
Convection: Newton's Law.
Heat transfer: Radiation.
Radiation: Stefan-Boltzmann law. Incident, absorbed and emitted radiation.
Radiative balance between two surfaces.
Simultaneous heat transfer.
Simultaneous heat transfer mechanisms

3. HEAT TRANSFER UNDER STEADY CONDITIONS.
Stationary heat transfer on flat walls.
Conduction on flat walls.
Thermal resistance to conduction in flat walls.
Thermal resistance to convection in flat walls.
Thermal resistance to radiation in flat walls.
Combined thermal resistance in flat walls: Convection-Radiation.
Network of thermal resistances in series on flat walls.
Network of parallel thermal resistances on flat walls.
Mixed thermal resistance network on flat walls.
Stationary heat transfer in cylinder and sphere.
Conduction through a cylinder.
Conduction through a sphere.
Network of thermal resistances in cylinders and spheres.
Critical insulation radius.
Convection.
Convection Mechanism.
Nusselt number.
Velocity boundary layer.
Thermal boundary layer.
Prandtl number.
Laminar and turbulent flow: Reynolds number.
Radiation.
Properties of radiation.
Radiation laws.
Radiation parameters

4. HEAT CONDUCTION EQUATION
Steady and transient heat transfer.
Thermal conduction in one dimension.
Multidimensional thermal conduction.
Heat generation.
One-dimensional thermal conduction on a flat wall.
One-dimensional thermal conduction in a cylinder.
One-dimensional thermal conduction on a sphere.
General conduction equation.
Border conditions in conduction.
Conduction-convection boundary conditions.
Conduction-radiation boundary conditions.
Examples of one-dimensional steady state conduction.
Generation of heat in a solid.
Convective transfer to the environment of the heat generated by a solid.
Conductive transfer to a pipe of the heat generated inside it.
Variable thermal conductivity.

5: HEAT EXCHANGERS.
Types of heat exchangers.
Total heat transfer coefficient.
Embedding factor.
Analysis of heat exchangers.
Heat transfer rate in an insulated exchanger.
Rate of heat transfer in a phase change.
Logarithmic Mean Temperature Difference Method -LMTD.
Double tube and parallel flow.
Flow and Counterflow.
Double tube and Counterflow.
Exchanger Selection.
Effectiveness method –NTU.
Effectiveness Relationships.
Relationships –NTU.
Selection of Heat Exchangers.
ELECTROMAGNETISM 1: COULOMB'S LAW. ELECTRICAL FORCES AND FIELDS.
Historical background of electricity. Atomic structure. Leaf electroscope. Insulators and conductors. Electrification modes. Coulomb law. Force created by a system of point charges. Force created by a continuous distribution of load. Definition of electric field. Electric field created by a point charge. Electric field created by a point charges system. Electric field created by a continuous distribution of charges. Field created by a uniformly charged infinite rectilinear conductor. Field created by a rectilinear, finite, uniformly charged conductor. Field created by a ring uniformly charged at a point on its axis. Field created by a disk uniformly charged at a point on its axis. Field created by an infinite uniformly charged plane. Issues.

2: GAUSS'S LAW.
Introduction. Force lines. Rules for representing force lines. Electrical flow. Gauss's theorem. Consequences of Gauss's theorem. Applications of Gauss's law to the calculation of electric fields. Field that creates a charged point. Field that creates a charged sphere. Field created by a uniformly charged insulating sphere. Field created by an infinite rectilinear conductor. Field created by a uniformly charged infinite conducting plane. Field created by an infinite, uniformly charged flat sheet. Issues.

3: MAGNETISM. MAGNETIC FIELDS AND FORCES.
Interaction between electric charges in motion. Magnetic force between moving charges, Lorentz force. Induction lines. Magnetic flux. Magnetic force on a current-carrying conductor within a magnetic field. Effects of a constant and uniform magnetic field on a current loop. Magnetic field created by a mobile charge q at a point P. Value and units of the magnetic constant K´. Magnetic field created by a current element at a point P, Biot's Law. Field created by a rectilinear and infinite conductor, Biot and Savart's law. Magnetic force between two parallel conductors. Definition of ampere. Magnetic field created by a loop. Magnetic field created by a solenoid. Magnetic field created by a toroidal winding. Equilibrium position of a loop in a magnetic field foreign to it. Ampere's Law. Application of Ampere's law: Magnetic field created by an ideal solenoid, magnetic field created by a toroidal winding at points inside it. Displacement current and generalized Ampere's law. Gauss's law of magnetism.

4: INDUCED ELECTROMOTIVE FORCE.
Introduction. Induced electromotive force. Faraday's Law. Elementary alternating current generator. Elementary direct current generator. Lenz's Law. Eddy currents. Maxwell's equations.

5: INDUCTANCY.
Mutual induction coefficient. Self-induction coefficient. Association of coils in series. Coupling coefficient between coils. Magnetic energy. Applications. Issues.

6: MAGNETIC PROPERTIES OF MATTER. MAGNETIC CIRCUITS.
Classification of substances according to their magnetic properties: diamagnetic, paramagnetic and ferromagnetic substances. Magnetomotive force. Magnetic circuits. Types of magnetic circuits. Magnetic permeability. Relative permeability. Relationship between electrical and magnetic circuits. Association of reluctance. Magnetic field intensity. B-H curves. Hysteresis cycle of a ferromagnetic material.
LAB_HEAT TRANSFER LAB 1: CALORIMETRY. Experiments
LAB 2: HEAT TRANSFER. Experiments
LAB 3: HEAT TRANSFER SIMULATOR (PC)
LAB_ELECTROMAGNETISM LAB 1: Basic electricity laboratory: Sources, basic passive elements, measurement equipment.
LAB 2: The multimeter. Assembly and measurement in basic electrical circuits AC DC.
LAB 3: Measurement and calculations of parameters and magnitudes in circuits. Design of lighting circuits.

Planning
Methodologies  ::  Tests
  Class hours Hours outside the classroom Total hours
Problem solving, classroom exercises 16 21 37
 
Laboratory practicals 12 12 24
 
Lecture 28 45 73
 
Mixed tests 4 12 16
 
(*)The information in the planning table is for guidance only and does not take into account the heterogeneity of the students.

Methodologies
Methodologies   ::  
  Description
Problem solving, classroom exercises The teacher solves typical problems on the different topics. These problems serve as a basis for the development of other problems that will raised in the seminars.
Laboratory practicals Apply, on a practical level, the theory of a field of knowledge in a specific context. Practical exercises based on carrying out experiments in different laboratories.
Lecture Verbal presentation of each topic, relying on existing audiovisual resources. The student is motivated to actively participate by proposing questions about the contents of the class.

Personalized attention
 
Lecture
Problem solving, classroom exercises
Mixed tests
Description

Assessment
  Description Qualification
Lecture Theoretical and problem contents:
Mastery of knowledge and understanding of the subject.
Mixed objective tests of problems and theoretical questions
60%
Problem solving, classroom exercises Joint evaluation with that corresponding to the Master Session. 0%
Others 1. Laboratory practical contents:
Aptitude in handling equipment.
Participation in assemblies and data collection.
Result analysis interpretation.
Assessment of participation and, where appropriate, the corresponding reports.

2. Practical content in evaluation seminars:
Participation in the proposed activities.
Carrying out the proposed activities, deliverables.
Assessment of participation and, where appropriate, the proposed work.
40%
 
Other comments and second call

 

The evaluation will be developed throughout the course. The final grade will be the result of the weighted sum of the grades obtained in the exercises and practices, developed by the student in the different steps through seminars, works, problems and laboratory sessions, as well as the result of the different mixed evaluation tests that teachers carry out during the course. The sum of the grades for theory, laboratory and seminars or assignments, in the percentages expressed in the previous table, will result in the final grade for the subject. This must be equal to or greater than 5 out of 10 to obtain a passing grade or higher. 

Evaluation in 1st call. The final exam of theory and problems will be composed of two parts corresponding to each block (A: heat transfer and B: electromagnetism) with the same weight in the final grade. To pass the subject, it is a necessary, but not sufficient, to obtain a minimum grade of 3 out of 10 in each of the parts into which each module is divided. If the minimum is reached in each of the parts of each module, the grade for the theory and problems part will be the average of the grades obtained. In any case, to pass the theory and problems part and therefore the subject, it will be necessary to obtain an average grade equal to or greater than 4 out of 10. The corresponding grade for the seminar or work and laboratory parts, will be added to this average grade. All parts are weighted according to the previous table. Attendance at laboratory sessions and the corresponding reports is mandatory. Failure to comply with this condition will imply a grade of zero in this part of the subject. Likewise, non-attendance to the assignments, or their non-completion on the indicated date (without prior notice if it is in ordinary class, due to continuous evaluation) or non-delivery of the reports will imply the grade of zero in this part of the subject. The sum of the grades for theory, laboratory and seminars or assignments, in the percentages expressed in the previous table, will result in the final grade for the subject. This must be equal to or greater than 5 to obtain a passing grade or higher 

Evaluation in the 2nd call. The evaluation procedure in the 2nd. call will coincide with what was expressed in the 1st. call with the following exceptions: THEORY AND PROBLEMS: If a module (heat transfer or electromagnetism) has been passed in the first call, the student will keep the grade for the 2nd. call. and should only be examined from the pending module. SEMINARS: If the proposed seminars have been carried out in the continuous evaluation, the grade will be saved for the 2nd call. If they have not been completed, the student will not have the option to grade in that part.

OTHER COMMENTS: The teacher will inform prior to the evaluation tests and through the teacher-student communication channel that he considers appropriate (Moodle, bulletin board). announcements, the classroom, email...) of the additional materials, media and resources necessary for the development of the exams or evaluation tests. The use and mere possession of electronic devices that enable communication with the outside of the room (mobile phones, radio transmitters, etc.) are expressly prohibited. Communication between students or passing anything during the evaluation tests is expressly prohibited. If any irregularity occurs during the evaluation test, the corresponding Regulations will apply.


Sources of information
Access to Recommended Bibliography in the Catalog ULE

Basic BLANES/SERRANO/TRAPOTE, Electricidad y magnetismo. Conceptos fundamentales., Universidad de León. Secretariado de publicaciones. ,
TRAPOTE/SERRANO, Electricidad y magnetismo. Ejercicios de examen resueltos., Universidad de León. Secretariado de publicaciones.,
Sears et al , Física Universitaria o similar título, Varias,
Yunus A. Çengel, Transferencia de Calor y Masa, McGraw-Hill, 2011

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