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Optimization of the cleaning of the heating surfaces on the coal boiler K1 in Plzeňská teplárenská
Kostrhounová, Petra ; Tomáš, Zdeněk (referee) ; Baláš, Marek (advisor)
This master’s thesis deals with the assessment of cleaning of heat transfer surfaces of a coal-fired steam boiler. The first part is devoted to the description of the knowledge about the formation of deposits, the deposits influence on the operation of the plant and cleaning mechanisms. Then, basic information on the operation, design and method of removal of deposits of the K1 boiler is summarised. Based on this knowledge, operating data from four summer months of boiler operation are analysed to determine the fouling condition of the boiler surfaces and over fifty graphs are produced showing the evolution of selected operating values between each cleaning cycle of the convective and plate superheater as well as air preheater. Subsequently, a parametric model of the K1 boiler at 60 % output is created in PPSD, which allows a more detailed analysis of the boiler operating characteristics and is used for a more thorough interpretation of the operating data. In addition, two models for higher boiler outputs and three theoretical models of operating conditions with different levels of surface fouling were developed. To verify the accuracy of the developed model, a calculation of heat transfer through the outlet superheater is performed. Finally, the calculation of steam consumption for sootblowing is performed.
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Design of the steam generator for a nuclear power plant
Hort, Lukáš ; Špiláček, Michal (referee) ; Milčák, Pavel (advisor)
This bachelor's thesis is about the design of a steam generator for a nuclear power plant. The opening chapters are purely theoretical, with the first one covering nuclear energy as such, the next one continuing with the search for different types of parogenerators and their subsequent comparison. This is followed by a calculation section dealing with the thermal calculation of the parogenerator for the given parameters.
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Induction machine design software
Rúra, Dávid ; Mach, Martin (referee) ; Bárta, Jan (advisor)
This thesis is dealing with design algorithm of squirrel cage machines with TEFC design focusing on electromagnetic and thermal design. This type of machine is mostly used in the industry because of its specific properties. Design TEFC machines are supported by year-tested analytical calculations with high accuracy. The aim of this work is to decrease human factor in the design process implementing algorithms and optimization.
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Thermal calculation of steam boiler
Růžička, Tomáš ; Lisý, Martin (referee) ; Baláš, Marek (advisor)
The topic of this thesis is the thermal calculation of steam boiler with natural gas fuel. The first part is describing technical characteristic and parametres of the boiler. The main part of this thesis is the thermal calculation of the boiler. The following part deals with determination of steam amount and steam parametres for blowing through pipes of the boiler.
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The thermal calculation of a induction furnace
Hradilová, Irena ; Raček, Jiří (referee) ; Lázničková, Ilona (advisor)
This work deals with induction devices, in particular temperature computations of induction devices. The thesis is divided into three parts. In the first part, we give basic definitions of inductive warming and theoretical know ledge of heat induction that are needed to understand the problem of inductive warming. In the second part, we describe the principle of induction devices. We focused on crucible furnace which is described in details. We used this device for thermal computation of induction device. In the last part, we theoretically describe procedure of thermal computation of the most used induction devices, i.e., canal furnace, diathermy induction device, and crucible furnace; the last one is compared with the rest of induction devices from the computation point of view. For the induction crucible furnace, we provide numeric thermal computation at the end.
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Design of Steam Generator 13 t/h
Pálka, Jaroslav ; Kraml, Stanislav (referee) ; Lisý, Martin (advisor)
Master's thesis focuses on the design of a steam generator that utilizes superheated steam from a woodchip boiler for heating purposes. The steam generator produces saturated steam with variable parameters that depend on operational requirements. The integration of the steam generator into the thermal circuit is also taken into consideration. The primary objective of this thesis is to conduct through thermal calculations for the steam generator and design the inlets and outlets. In addition, a basic process control system has been designed.
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Nuclear power plant condenser design
Havel, Jaroslav ; Kracík, Petr (referee) ; Milčák, Pavel (advisor)
The submitted bachelor’s thesis deals with the design of a condenser for the new Dukovany II nuclear power plant with an electrical output of 1,200 MW. The specified condensation parameters reflect typical parameters of pressurized light-water moderated and cooled reactors of the same power and climatic conditions in the given location. From the assignment of the thesis and the research carried out, the following requirements for the designed device emerged: to ensure the condensation of steam in the secondary circuit in filmwise condensation mode, to comply with the maximum cooling water heating of 10 K, to install the tube bundle at optimum angle and to ensure the competitiveness of the product. For the selected concept with a four-body condenser, a thermal analysis was made and solved numerically by a fixed-point iteration method. The calculation was performed using the EES software. The results showed that a heat transfer surface area of 121,263.96 m is required to ensure failure-free operation of the condenser. Each condenser body consists of 31,400 titanium tubes with a cross-section of ( 22 × 0,5) mm and a length of 14,554 mm. A dimensional drawing is also attached.
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The design of nuclear power plant steam generator
Zimmermann, Jakub ; Baláš, Marek (referee) ; Milčák, Pavel (advisor)
The bachelor's thesis consists of three parts. The introductory research section briefly describes the history of nuclear energy, followed by an analysis of the three circuits (primary, secondary, and tertiary) in a nuclear power plant. The second part provides a detailed description of various steam generators used worldwide. The third and main part of this bachelor's thesis covers the thermal calculation of a steam generator, focusing on determining the heat exchange surface area and the length of heat exchange tubes inside, followed by a comparison of steam generator sizes based on their number of connections to a single nuclear reactor block. At the end, I modelled a model and created a diagram of the steam generator based on the results from the thermal calculation.
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Design of a heat exchanger for the recovery of waste heat from a sewerage system
Novák, Filip ; Baláš, Marek (referee) ; Toman, Filip (advisor)
The theoretical part of bachelor thesis was focused on heat exchangers and wastewater heat recovery systems. In theoretical part, everyday applications and practical notes of heat exchangers and recovery systems were emphasized. In practical part of thesis, heat calculation of double tube heat exchanger was carried out for operation in winter months. Using --NTU method, heat output of exchanger was recalculated for each month separately, from which, the total heat recovered in the course of year was calculated. Last part of the thesis was focused on a economical aspect of the heat exchanger (manufacturing and maintenance costs). This amount of money was compared with cost of water heating using heat pump, gas boiler and automatical wood pellet boiler.
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