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Energy Problems of Electrical Heating Equipment

* Exchange students do not have to consider this information when selecting suitable courses for an exchange stay.

Course Unit Code410-4118/01
Number of ECTS Credits Allocated6 ECTS credits
Type of Course Unit *Optional
Level of Course Unit *Second Cycle
Year of Study *First Year
Semester when the Course Unit is deliveredSummer Semester
Mode of DeliveryFace-to-face
Language of InstructionCzech
Prerequisites and Co-Requisites Course succeeds to compulsory courses of previous semester
Name of Lecturer(s)Personal IDName
HRA50prof. Ing. Zdeněk Hradílek, DrSc.
KRA24doc. Ing. Vladimír Král, Ph.D.
Summary
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
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
Lectures:
Electrical resistance heat
Alternative power supply for electric heating. Automatic control of heating.
Determination of distribution transformers power reguirement supplying electric heating. Dependence on the outdoor temperature.
Connection and protection heating appliances. Bleeder load (demand limiter).
Floor heating power supply.
EAF side effect.
Current flicker source of EAF. Types of voltage flicker.
Possibilities of flicker restriction of EAF.
Power factor compensation of EAF.
EAF mode control, computer control.
Reduction of energy consumption. PC Diagnostic
Optimization of energy mode of EAF by reactor
Asymmetric load of inductive devices.
Power supply for high frequency surface heating.

Exercises:
Proposal of power supply for direct and indirect resistance heating.
Heating with heating chains, belts and cables. Industrial applications.
Power supplies for heating with heating chains and belts. Control systems. Safety factor.
Types of electric heating, design and use.
Control and economy.of electric heating
EAF energy mode. Stages of melting and their energy demand factor.
Methods of energy mode control.
Basic parameters of electric arc. Influences of the energy transfer.
Back effects of EAF on the power system, their reduction. Voltage and power factor compensation.
Economic evaluation of the EAF operation, optimization of supply mode.
Inductive appliances, applications, power supplies. The issue of asymmetric load of inductive appliances.
Proposal of inductive devices with PC support.

Projects:
Optimization of direct resistance heating with the aid of simulation SW.
Performance characteristics of EAF.
Recommended or Required Reading
Required Reading:
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:
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
Lectures, Tutorials, Experimental work in labs, Project work, Other activities
Assesment methods and criteria
Task TitleTask TypeMaximum Number of Points
(Act. for Subtasks)
Minimum Number of Points for Task Passing
Exercises evaluation and ExaminationCredit and Examination100 (100)51
        Exercises evaluationCredit45 20
        ExaminationExamination55 6