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Electric induction furnaces in foundries
Bruštík, Josef ; Kaňa, Václav (referee) ; Šenberger, Jaroslav (advisor)
The main aim of this Bachelor thesis is to create a technical summary on the topic of “The electric induction furnaces in foundries” and be more closely familiar with this issue. A division of furnaces and ways of melting by particular types of furnaces are briefly described. On the basis of gained knowledge, an evaluation of economic and technical advantages of these melting devices was performed and subsequently it is recommended for further usage in the foundries.
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System for Exhausting of Combustion Gases over the Sintering Grate
Kratochvílová, Silvie ; Nohál, Libor (referee) ; Dvořáček, Jiří (advisor)
This bachelor thesis deals with solution for waste gases exhaustion system above the sinter grate. The first part is dedicated to the general treatise about sinter grate, its operations and individual modifications. Another part looks into issues covering placing of the cover above the sinter grate. Proposal of optimal solution of the waste gases exhaustion system is done in last part, where are described reasons, which lead to its choice.
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Optimalization of Induction Furnace Operation in foundry Vsetín
Trachta, Jiří ; Nowak, Stanislav (referee) ; Lázničková, Ilona (advisor)
The aim of this work is optimalisation of induction furnace in foundry for company PROMET FOUNDRY a.s. The company has two induction furnances. There are installed as identical construction. They have 2 modes of operation. First mode is founding and second mode is mode, where is temperature in maintain mode. Only one induction furnance can work in the founding mode at a time though. Inducion furnances are in the single-phase connection and they cause unbalance in the distribution network. Near the foundry there is a small network area whitch it is operated by company Zásobování teplem Vsetín a.s. The consumption of electrical energy in foundry so big, that in the year 2009 was made elaborate for Zásobování teplem Vsetín a.s. It was write at Laboratoře diagnostiky výkonů (Laboratory of performance diagnostics), which is a part of Electrotechnic Department at Technical Univarsity of Ostrava. The ordered study was named “Verification of causes of increased reactive energy consumption during transition from electricity delivery to electricity consumption”. The conclusion of this assignment confirms that in distribution network in the Jiráskova area in Vsetín there is unbalance of electrical energy and there is high part of reactive power. The next conclusion is crucial to find the customer who made the unbalance and to set relevant remedy. The last step will be the identification whether such device can actually be effectively balanced. It was subsequently proved that the Promet Foundry was causing the unbalance and that balanced consumption would be reasonable. Promet Foundry thus addressed Autel a.s. company with an inquiry to make a study of removing the causes of the unbalance which is caused by current induction furnaces operation at a minimum possible cost, least possible influence on the performance and minimum construction changes concerning the building. In this thesis there will be some topics. The result of which will be introducing of used heating technology, introducing of company and of effective plant performance and subsequent suggestions of possible unbalance removal or reactive power decrease. Several ways which are being implemented in the industry in order to balance consumption will be described. A suitable balancing plant will be subsequently chosen and its parameters will be calculated.
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Energetic problems of induction electroheat equipments
Milka, Jiří ; Paar, Martin (referee) ; Lázničková, Ilona (advisor)
Induction heating is mostly used for melting metal materials in metallurgy. The principle of induction heating comes from electromagnetic induction which generates eddy currents heating the charge in electrically conducting material. The first part of the bachelor thesis is devoted to the principle of induction heating. Further, there are possibilities of applying the induction heating in electro heat devices mentioned. As the paper is focused on energy problems appearing when getting connected to the grid, the second part of the paper contains explanation – both theoretical and on examples - of compensation and symmetrization of induction electro heat devices.
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System for Exhausting of Combustion Gases over the Sintering Grate
Kratochvílová, Silvie ; Galas, Radovan (referee) ; Dvořáček, Jiří (advisor)
This bachelor thesis deals with solution for waste gases exhaustion system above the sinter grate. The first part is dedicated to the general treatise about sinter grate, its operations and individual modifications. Another part looks into issues covering placing of the cover above the sinter grate. Proposal of optimal solution of the waste gases exhaustion system is done in last part, where are described reasons, which lead to its choice.
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Optimalization of indirect resistance heating
Havránek, Miroslav ; Bok, Jaromír (referee) ; Lázničková, Ilona (advisor)
The indirect resistance heating is one of many ways of heating a melting charge. It is used in metallurgy, mostly for melting of soft metals. Its principle is a direct resistance heating in correspondence with the Joule´s law. The principle of indirect resistance heating is in generating of thermal energy in heating element and heat transferring this heat into the melting charge. The theoretical part of this Bachelor Work (the first three chapters) is focused to thermal energy generation and possibility of thermal transmittance. The fourth chapter is devoted to possibility of utilizing of the indirect heating in praxis. The simplest general design and calculation of a pot-type furnace for aluminium melting is done in the fifth chapter. There is a part in this chapter, which deals with the effectivity of the designed pot-type furnace and possibility of heating optimalization in case when indirect heating system is used. The input and calculated parameters of our designed furnace are summed up in the conclusion. There is also comparison of the designed furnace and a furnace readily available on the Czech market and stress on importance of optimalization of heating at indirect heating systems.
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System for Exhausting of Combustion Gases over the Sintering Grate
Kratochvílová, Silvie ; Nohál, Libor (referee) ; Dvořáček, Jiří (advisor)
This bachelor thesis deals with solution for waste gases exhaustion system above the sinter grate. The first part is dedicated to the general treatise about sinter grate, its operations and individual modifications. Another part looks into issues covering placing of the cover above the sinter grate. Proposal of optimal solution of the waste gases exhaustion system is done in last part, where are described reasons, which lead to its choice.
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Energetic problems of induction electroheat equipments
Milka, Jiří ; Paar, Martin (referee) ; Lázničková, Ilona (advisor)
Induction heating is mostly used for melting metal materials in metallurgy. The principle of induction heating comes from electromagnetic induction which generates eddy currents heating the charge in electrically conducting material. The first part of the bachelor thesis is devoted to the principle of induction heating. Further, there are possibilities of applying the induction heating in electro heat devices mentioned. As the paper is focused on energy problems appearing when getting connected to the grid, the second part of the paper contains explanation – both theoretical and on examples - of compensation and symmetrization of induction electro heat devices.
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Optimalization of indirect resistance heating
Havránek, Miroslav ; Bok, Jaromír (referee) ; Lázničková, Ilona (advisor)
The indirect resistance heating is one of many ways of heating a melting charge. It is used in metallurgy, mostly for melting of soft metals. Its principle is a direct resistance heating in correspondence with the Joule´s law. The principle of indirect resistance heating is in generating of thermal energy in heating element and heat transferring this heat into the melting charge. The theoretical part of this Bachelor Work (the first three chapters) is focused to thermal energy generation and possibility of thermal transmittance. The fourth chapter is devoted to possibility of utilizing of the indirect heating in praxis. The simplest general design and calculation of a pot-type furnace for aluminium melting is done in the fifth chapter. There is a part in this chapter, which deals with the effectivity of the designed pot-type furnace and possibility of heating optimalization in case when indirect heating system is used. The input and calculated parameters of our designed furnace are summed up in the conclusion. There is also comparison of the designed furnace and a furnace readily available on the Czech market and stress on importance of optimalization of heating at indirect heating systems.
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Optimalization of Induction Furnace Operation in foundry Vsetín
Trachta, Jiří ; Nowak, Stanislav (referee) ; Lázničková, Ilona (advisor)
The aim of this work is optimalisation of induction furnace in foundry for company PROMET FOUNDRY a.s. The company has two induction furnances. There are installed as identical construction. They have 2 modes of operation. First mode is founding and second mode is mode, where is temperature in maintain mode. Only one induction furnance can work in the founding mode at a time though. Inducion furnances are in the single-phase connection and they cause unbalance in the distribution network. Near the foundry there is a small network area whitch it is operated by company Zásobování teplem Vsetín a.s. The consumption of electrical energy in foundry so big, that in the year 2009 was made elaborate for Zásobování teplem Vsetín a.s. It was write at Laboratoře diagnostiky výkonů (Laboratory of performance diagnostics), which is a part of Electrotechnic Department at Technical Univarsity of Ostrava. The ordered study was named “Verification of causes of increased reactive energy consumption during transition from electricity delivery to electricity consumption”. The conclusion of this assignment confirms that in distribution network in the Jiráskova area in Vsetín there is unbalance of electrical energy and there is high part of reactive power. The next conclusion is crucial to find the customer who made the unbalance and to set relevant remedy. The last step will be the identification whether such device can actually be effectively balanced. It was subsequently proved that the Promet Foundry was causing the unbalance and that balanced consumption would be reasonable. Promet Foundry thus addressed Autel a.s. company with an inquiry to make a study of removing the causes of the unbalance which is caused by current induction furnaces operation at a minimum possible cost, least possible influence on the performance and minimum construction changes concerning the building. In this thesis there will be some topics. The result of which will be introducing of used heating technology, introducing of company and of effective plant performance and subsequent suggestions of possible unbalance removal or reactive power decrease. Several ways which are being implemented in the industry in order to balance consumption will be described. A suitable balancing plant will be subsequently chosen and its parameters will be calculated.
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