| Course Unit Code | 410-4118/03 |
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| Number of ECTS Credits Allocated | 8 ECTS credits |
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| Type of Course Unit * | Compulsory |
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| Level of Course Unit * | Second Cycle |
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| Year of Study * | First Year |
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| Semester when the Course Unit is delivered | Summer Semester |
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| Mode of Delivery | Face-to-face |
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| Language of Instruction | Czech |
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| Prerequisites and Co-Requisites | Course succeeds to compulsory courses of previous semester |
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| Name of Lecturer(s) | Personal ID | Name |
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| HRA50 | prof. Ing. Zdeněk Hradílek, DrSc. |
| KRA24 | doc. Ing. Vladimír Král, Ph.D. |
| Summary |
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| The course focuses on industrial applications of resistance, induction, arc, dielectric, electron and laser principles of utilization of transformation of electric energy into thermal energy, their optimization with regard to energy consumption and elimination their disturbances on the supply network. It also includes energy issues of electrical heating. |
| Learning Outcomes of the Course Unit |
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| After completing the course the student can apply the theory to the design of electric heating method, can assess the interference effects of electro-thermal devices on the power grids and suggest possibilities of their limitation. In exercises, laboratories, and projects, it demonstrates the ability to calculate and design electro-thermal devices with computer support when applying a variant solution. |
| Course Contents |
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Lectures:
Heat transfer. Electrical resistance heat.
Electric arc furnaces (EAF) - arc characteristics, circular diagram, power supply asymmetry, operating characteristics.
EAF - energy balance, disturbing effects, possibilities of compensation.
Energy EAF optimization with EAF reactor, EAF compensation devices, EAF diagnostics.
Plasma electrothermal appliances.
Induction electrothermal appliances - crucible and channel furnaces.
Inductive surface heating, heating, soldering and welding.
Asymmetry in inductive electrothermal equipment devices.
Dielectric heating. Power sources for induction and dielectric heating.
Microwave heating. Electron heating.
Laser electrothermal appliances. Arc and resistance welding.
Protection and connection of electrothermal appliances. Load compensation.
Electrical heating. Design of electric heating. Automatic regulation of heating.
Power supply of floor heating.
Exercises:
Getting acquainted with the requirements for passing the exercises. Safety regulations. Instructions for processing projects and protocols.
Design of an electric resistance furnace
Indirect resistance heating - furnace control, comparison of energy consumption for heating the charge by theoretical calculation and measurement on a real laboratory furnace.
Indirect resistance heating - Calculation of batch heating time. Direct resistance heating.
Calculate the short EAF path. Choke.
EAF - work with circular diagram, working characteristics.
EAF control systems.
Design of an induction crucible furnace.
Project assignment.
Inductive channel furnaces, dielectric heating.
Calculation of heat losses.
Design of electric heating, economic evaluation.
Credit test.
Labs:
Direct resistance heating.
Symmetry of single-phase load.
Projects:
Optimisation of indirect resistance heating.
Optimisation of direct resistance heating.
Optimisation of an electric arc furnace. |
| Recommended or Required Reading |
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| Required Reading: |
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Metaxas, A. C. Foundations of electroheat: a unified approach. Chichester: Wiley, 1996. ISBN 9780471956440
Hradílek, Z. Teoretical aspects of alternative proposals of electric heating. Ostrava: Sborník vědeckých prací VŠB TUO 1999
Hradílek, Z. Alternative proposal of electric heating in closed spaces. Lisabon: U.I.E. Congress Lisabon Portugal 2000
Hradílek, Z. at. all Cooperation on Engineering Education Computer Aided Disign and Work Simulation of Electric Furnaces and Heaters. Ostrava: Proceedings of International Conference ICEE 1999, Ostrava |
Hradílek, Z., Lázničková, I., Král, V. Elektrotepelná technika. Praha: ČVUT Praha, 2011, ISBN 978-80-01-043938-9
Hradílek, Z. Elektroenergetika distribučních a průmyslových zařízení. Ostrava: VŠB-TU Ostrava, Montanex, 2008
Hradílek, Z. a kol. Elektrotepelná technika. Simulace - počítačové programy. Ostrava: Skripta VŠB-TU Ostrava, 2001
Metaxas, A. C. Foundations of electroheat: a unified approach. Chichester: Wiley, 1996. ISBN 9780471956440 |
| Recommended Reading: |
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Hradílek, Z. Teoretical aspects of alternative proposals of electric heating. Ostrava: Sborník vědeckých prací VŠB TUO 1999
Hradílek, Z. Alternative proposal of electric heating in closed spaces. Lisabon: U.I.E. Congress Lisabon Portugal 2000
Hradílek, Z. at. all Cooperation on Engineering Education Computer Aided Disign and Work Simulation of Electric Furnaces and Heaters. Ostrava: Proceedings of International Conference ICEE 1999, Ostrava |
Hradílek, Z. Elektrotepelná technika. Ostrava: Skripta VŠB TU Ostrava, 1996, ISBN 80-7078-323-0.
Hradílek, Z., a kol. Elektrotepelná technika, Simulace a počítačové programy. Ostrava: Skripta VŠB TU Ostrava, 2001, ISBN 80-7078-874-7
Hradílek, Z. a kol. Elektrotepelná zařízení. Praha: IN-EL Praha, 1997, ISBN 80-902333-2-5
Žídek, J., Gavlas, J. Elektrické teplo - návody do cvičení. Ostrava: Skripta VŠB-TU Ostrava |
| Planned learning activities and teaching methods |
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| Lectures, Tutorials, Experimental work in labs, Project work, Other activities |
| Assesment methods and criteria |
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| Task Title | Task Type | Maximum Number of Points
(Act. for Subtasks) | Minimum Number of Points for Task Passing |
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| Credit and Examination | Credit and Examination | 100 (100) | 51 |
| Credit | Credit | 45 (45) | 20 |
| Písemka | Written test | 10 | 1 |
| Projekty | Project | 25 | 3 |
| Laboratorní práce | Laboratory work | 10 | 2 |
| Examination | Examination | 55 (55) | 11 |
| Písemná zkouška | Written examination | 33 | 6 |
| Ústní zkouška | Oral examination | 22 | 5 |