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Control of CNC mill
Cedrych, Jan ; Petyovský, Petr (referee) ; Macho, Tomáš (advisor)
In this thesis is discussed the possibility of upgrading the control system of mill MAHO MH 500 C with regard to current condition of the machine, planned use and owner financial capacity. The thesis also deals about connecting existing electrical equipment with a new control system. The proposed design allows simultaneous machining in three axes and positioning rotary table.
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Retrofit HP Section Steam Turbine 300MW
Vaľočík, Jan ; Buršík, Michal (referee) ; Buršík, Michal (referee) ; Fiedler, Jan (advisor)
The aim of this master‘s thesis is retrofit of a 300 MW tandem compound steam turbinetype K300 - 170 with three casings and reheat of steam. In the first part a heat balance of the cycle is calculated for given nominal parameters. Further the thesis is focused only on the high pressure section of the turbine, for which the flow section is designed based on thermodynamic calculations and appropriate blade profiles are selected. Then the stress control of the blading is done. The thesis is concluded with estimation of power loss due to shaft seals and real power output of the turbine is calculated. This thesis also includes a drawing of axial section of the high pressure section of the turbine.
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The use of visualization method for heat exchanger network retrofit
Witos, Anton ; Rebej, Miroslav (referee) ; Jegla, Zdeněk (advisor)
The visualisation methods of heat exchanger network are key part for their retrofit. These methods allow better orientation and help in location of network area which is suitable for retrofit purposes. Such method is Shifted Retrofit Thermodynamic Grid Diagram (SRTGD). The aim of this diploma thesis is based on the recommended literature and in combination with the calculation procedure to apply this method to industrial examples and to examine the possibilities of its use in practice. Part of the solution of industrial examples is also a comparison of this visualization method with one of the competing methods of displaying heat exchanger networks, such as the Grid Diagram method. The aim of comparing the SRTGD method with one of the competing methods is to examine the advantages and disadvantages of this method.
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Application of process system engeneering
Hrncsjarová, Hana ; Turek, Vojtěch (referee) ; Jegla, Zdeněk (advisor)
The master’s thesis is focused on familiarization with modern techniques and procedures of process system engineering for identification of energy savings. In this case, process system engineering is applied to the issue of heat exchanger networks and in order to save energy, their retrofit is solved here. The current network pinch method, which uses mathematical programming options, is described for the retrofit of the heat exchanger networks. The method is presented in comparison to older development methods, mainly with the PDM. In addition, the calculation procedure is also developed by this method and in the Maple software environment it is applied to the case of heat exchanger network retrofit in the process of hydrogenation refining of oil. Part of the thesis is an evaluation of the results obtained, including a discussion of the properties of the method used.
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Retrofit IP-LP Section Steam Turbine 300MW
Pavlik, Richard ; Fichtl, Richard (referee) ; Fichtl, Richard (referee) ; Fiedler, Jan (advisor)
The aim of this master’s thesis is a retrofit of condensing three case steam turbine K300-170 with reheating. In the first part, the heat balance of the system is calculated for given parameters. The design of the flow section is focused on the combined intermediate pressure and low pressure turbine section and it consists of defining rotor and blading characteristics. In the stress control, the stress of the designed blading is checked and for the conclusion the shaft seal losses and their effect on the overall output power of the turbine are estimated. The drawing of axial section of combined intermediate pressure and low pressure turbine section is also included in the thesis.
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The Influence of Photovoltaic Power Plants Disconnection During Frequency Deviations
Jasenský, Filip ; Máslo, Karel (referee) ; Toman, Petr (advisor)
The master thesis The Influence of Photovoltaic Power Plants Disconnection During Frequency Deviations introduce reader to the theory of frequency regulation in the electric power system. The theoretical part introduces regulation reserve that are used by transmission system operator to balance power imbalances. In the next part is made introduction to the system state classification and knowledge of European Network of Transmission System Operators for Electricity about unsolicited disconnection of photovoltaic plants. The theoretical part of the recommendations and simulations is followed by a part of the work in which the analysis of the implementation of the frequency boundary in which the photovoltaic power plants are operated in selected states of synchronously interconnected Europe. The master thesis continues to explain the origin of power imbalances by introducing a theory of electricity trading. Deterministic frequency deviations are one of the causes of the occurrence of frequent imbalances in the system and are discussed in the following chapter together with a proposal for a possible solution. In the last part of the master thesis are presented simulations that were made to determine the impact of the speed control regulator in the Czech Republic on unsolicited disconnection of photovoltaic power plants.
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Mobile App for Shared Shopping
Šťastná, Barbora ; Beran, Vítězslav (referee) ; Herout, Adam (advisor)
The goal of this thesis is to create a mobile application for the Android operating system, which makes organizing a community shopping easier for its users and their friends. Each user can build a community of their own that offers collective purchasing of products, or can offer their products for purchase. They categorize these offers to their channels and their friends choose only those channels that they find interesting. If their friends accept their offer, they see the necessary information about their individual purchases. Thus, this application enables users to offer shared purchasing to their friends e.g. at a grower from whom these people could not buy individually. They can procure quality produce together at a competitive price and they can also reduce production of plastic packaging by purchasing as a group.
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Design of winglet for LS-3 glider
Koutník, Tomáš ; Šošovička, Róbert (referee) ; Popela, Robert (advisor)
This diploma thesis describes the design of winglets for LS-3 glider. The method for determination of main winglet parameters based on selected criterion is presented as well as comparation of performace of original wing and final modification. It also includes analysis of wing loading and resetting of speed and weight limits for flying with winglets.
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Withdrawable truck for MV switchgear SR12 with contactor VSC7
Sojka, Tomáš ; Honzák, Aleš (referee) ; Malášek, Jiří (advisor)
The bachelor thesis deals with the development of retrofit – withdrawable truck for medium voltage switchgear. It includes a brief overview of medium voltage switchgear, description of the process retrofitting and complete design of withdrawable truck with the VSC7 contactor for ABB MV switchgear SR12, including technical and economic optimization of the solution. The output of thesis is technical documentation of withdrawable truck in Solidworks.
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Mobile App for Management and Reservation of Sports Lessons
Hynek, Tomáš ; Tomešek, Jan (referee) ; Herout, Adam (advisor)
The goal of this thesis is to create a mobile application for Android that will offer management for reservations of training lessons. There are two user roles in the application. The first one is coach who can offer his lessons to other users. Users then can book this lesson right from the application. Coach can also manage all of his lessons and see his reservations in calendar. The second type of user is an athlete who can search for training lessons by name or place distance and then he can book them. The name of the application is Fittyy and it complies with Material Design rules. It uses advanced technologies like Android Jetpack to store local data, implement MVVM model or process server requests in the background. Communication between coach and athlete was implemented using CMS system made by Dactyl Group s.r.o.
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