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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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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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Passenger Vehicles Drive Unit Recent Development
Korenko, Miroslav ; Drápal, Lubomír (referee) ; Beran, Martin (advisor)
The aim of this bachelor's thesis is to cover current trends in development of propulsive units of personal automobiles. The introduction describes combustion engines and divides them into categories. The next chapters describe current development of gasoline and diesel combustion engines. The conclusion is aimed for the perspective view into the future and the problem of alternative propulsions.
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Lithium Sulphur Batteries
Juračka, M.
S+C cathode material was prepared by simple solid-state reaction in ball mill. Content of sulphur was approximately 80 wt. % in final sample. Cyclic voltammetry and galvanostatic charge/discharge techniques were used for characterization of the samples. Initial discharge capacity observed for S+C sample was 600 mAh/gsulfur. Capacity loss for S+C sample after 30th cycles was 66 %. Cycling loss is due to insoluble polysulfide formation. In this paper I present fundamental characteristics of Li-S batteries. This paper presents a principle of Li-S batteries, fundamental measurement and their evaluation. I present the techniques of measurement and preparation of cathode materials.
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Vytvoření podmínek pro efektivnější využívání ekonomických nástrojů: Podklady pro aplikaci ekonomických nástrojů (poplatků). Hodnocení efektivnosti poplatků v ochraně ovzduší. Hodnocení efektivnosti poplatků v odpadovém hospodářství
CENIA, česká informační agentura životního prostředí, Praha ; Hadrabová, Alena ; Kreuz, Jaroslav ; Šauer, Petr ; Prášek, Jan
Projekt se zabýval vytvořením prostředí, ve kterém by bylo možné sbírat, analyzovat a vyhodnocovat informace o ekonomických nástrojích. Stěžejními výstupy jsou: databáze ekonomických nástrojů zemí EU a její hodnocení, elektronický systém evidence poplatků a hodnocení jeho efektivnosti, metodika pro analýzu dopadů poplatků na životní prostředí a vlastní analýza funkce poplatků a přechodu od poplatků k daním. Hlavní obsah sdělení je uveden v přílohách.
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Construction and Realization of Automatic Battery Charger for Emergency Illumination
ANDERL, Jan
The thesis is focusing on the construction and realization of automatic source charger of emergency illumination. The work introduces the question of emergency lighting systems and backup power sources briefly. The main part of this work is concentrating on the concrete designing and realizing projects of the charging system. The output of this work is a specific technical solution and realization of an automatic charger in practice.
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Position of local charges in the budget revenue of the municipalities
BADOŠKOVÁ, Věra
The aim of my dissertation was to compare and assess how the municipalities I have chosen use the opportunity to introduce local charges. The theoretical part contains basic information about different types of local charges, their purpose, legal regulations and the administration and collection of the charges. The practical part compares collection of local charges in individual municipalities, their contribution to the local budgets and also an assessment of the effectiveness of the chosen charges.
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Analog and digital laser copy engines
SAMEC, Jiří
This thesis is aimed at the function description of a copying machine and his parts. Parts of this thesis are web pages. The aim of the thesis is created compact view and sketch problems of copying machines wider public.
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