Czech

Not applicable.

Graduate from this subject is able to:
- define and describe the basic quantity of the electrothermal technology, heat transfer, calorimetry and calculate them,
- design and calculate the basic parameters of electrical heating elements of electrical resistance crucial furnace,
- enumerate the types of electrothermal heatings and explain their physical nature,
- enumerate and describe the technical applications of electrothermal heatings.

The subject knowledge on the Bachelor´s degree level is requested.

Not applicable.

Teaching methods include lectures, numerical exercises and laboratories.

During the semester, the student can get a maximum of 30 points - credit test (max. 10 points), max. 2 independent papers (max. 12 points), laboratory reports (max. 8 points).

Credit: the student must obtain at least 50% of points in each graded activity (test, independent work, laboratory protocols).

The exam (max. 70 points) includes only the oral part - the student draws 3 questions from the range of questions for the exam and the student must get at least 5 points from each question.

The requirements for the successful completion of the subject are determined annually by the decree of the subject guarantor.

Lectures:
1. Basic terms, units, analogy between electric and temperature field, calorimetry, calculations.
2. Heat transfer, conduction, convection, radiation, compound cases of heat transfer, calculations.
3. Measuring of temperature in electrothermal technology. mechanical and electrical thermometers.
4. Electrical heating elements, materials of electrical heating elements, calculation of basic parameters of heating elements.
5. Resistance heating, direct and indirect heating. Electrical rasistance furnaces.
6. Design of resistance crucible furnace for melting of aluminium.
7. Electric arc heating, direct arc, alternating arc, stabilization of arc, static and dynamic characteristics of arc.
8. Electric arc furnace, connection to net, furnace transformer, short path, choke coil, electrodes, circle diagram of electrical arc furnace.
9. Plasma heting, plasma, basic processes in plasma, plasma heater, melting plasma furnace.
10. Induction heating, induction crucible and canal furnace, screening, pinch efect.
11. Induction heating, basic theory electromagnetig field, Poyinting radiant vector.
12. Dielectric heating, polarisation, loss number, microwave heating, magnetron.
13. Special electrothermal hetings - laser heating, electron heating, infrared heating, resonator, electron gun.

Numerical exercies:
Calorimetry, heat transfer and design of resistance crucible furnace are solved in concrete problems.

Laboratory exercises: 4 laboratory tasks

Not applicable.

Course content is to apprise students of basic theory of basic and special types of the electrothermal heatings and their technical applications.

The content and forms of instruction in the evaluated course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.

Not applicable.

Not applicable.

Baxant P., Drápela J., Lázničková I.: Elektrotepelná technika (elektronická skripta) (CS)
Baxant P., Drápela J., Lázničková I.: Elektrotepelná technika. Laboratorní cvičení (elektroncká skripta) (CS)
Lázničková I.: Elektrotepelná technika. Sbírka příkladů. Brno, 2013. (CS)

Hradílek Z., Lázničková I., Král V.: Elektrotepelná technika, ČVUT v Praze, Praha 2011. http://www.powerwiki.cz/wiki/Vyuka (CS)