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Design of plastic pressure vessel
Rackovský, Daniel Milan ; Létal, Tomáš (referee) ; Pernica, Marek (advisor)
This bachelor thesis deals with the design of a pressure vessel made of plastic. The introductory part of the thesis contains the theoretical knowledge related to plastic materials. The next part consists of the selection of materials suitable for the design of the pressure vessel and a deeper analysis of their mechanical and other properties. The last part of the thesis deals with the calculation of the wall thickness of the plastic pressure vessel based on the theory of momentless diaphragm shells and the verification of the results using the finite element method, in Ansys Workbench 2022 R1. The analytical calculation is also compared with the calculation using the relationships given in ČSN EN 13445.
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Design of a two-phase separator
Brančan, Peter ; Pernica, Marek (referee) ; Létal, Tomáš (advisor)
Design of a two-phase separator according to the model assignment for separation of natural gas and crude oil. Material selection and checkup for functionality on this process equipment. Emphasis is on selection of dimensions according to mathematical model of mixture sepation. Design is also considering safety of the vessel. Dimensions of separator are optimalized to the lowest possible price of a vessel, while maintaining functionality and required safety of a pressure vessel. Separator is designed according to the standart ČSN EN 13445. Iteretion programs in computational software MATLAB were created to make calculations easier. Programs were created for calculations of separator’s dimensions, nozzles and their reinforcing pads, checking calculations of the vessel and its nozzles and calculations of flanges.
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Deformation and damage of tube bundle bends due to temperature
Michálková, Anežka ; Pernica, Marek (referee) ; Létal, Tomáš (advisor)
This master’s thesis deals with the problem of determining the thermal load of cross-flow tube bundle bends in steam superheater. Firstly, the theoretical basis of computational fluid dynamics and finite element method is introduced, and the possible methods of creep damage evaluation are presented as it was assumed that creep damage would be the most significant damage mechanism. The next part of this thesis describes simulations in ANSYS Fluent to determine values of heat transfer coefficients and ANSYS Mechanical to obtain temperature field and stresses. Based on the determined temperature field and stresses, a creep lifetime calculation according to ČSN EN 12952-4 is performed. Then creep design check for operating time 200 000 hours was carried out according to ČSN EN 13445-3. It was determined that in this case the tube bends are not the critical spot in comparison with the straight sections of tubes.
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Tubesheet analysis according standards and FEM
Horniak, Patrik ; Vincour, Dušan (referee) ; Pernica, Marek (advisor)
The focus of this master’s thesis is strength design of tube sheet, which is part of shell and tube heat exchanger, with fixed tube sheets. This tube sheet is integrated with both shell and channel of the heat exchanger. First part of the thesis is focused on literature review of shell and tube heat exchangers, tube sheets and calculation standards, which are used for their strength design. The strength design of tube sheet is presented in second part of the thesis, according to the standards: ČSN EN 13445, ASME BPVC VIII and TEMA, along with comparison of these standards. Last section of the thesis deals with the implementation of FEM analysis and its comparison to the analytic approach of strength design, used in accordance to the standards mentioned above.
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Development of Methodology for Evaluating the Necessity of Shell Compensators fo Tubular Condensers
Pernica, Marek ; Reppich, Marcus (referee) ; Vincour, Dušan (referee) ; Jegla, Zdeněk (advisor)
This dissertation deals with strength analysis of shell and tube condenser with fixed tube sheet, which is equipped with shell expansion joint. The main aim of this thesis is to develop a methodology for determining of necessity of uses the expansion joint on the shell and tube condenser, while maintaining the safety and reliability of the equipment during operation, based on thermal-hydraulic and strength analyses. Industrial condenser is used as a safety equipment during the operation, therefore special attention is paid to the start-up process. The condenser start-up process is investigated by a number of transient strength and transient thermal analyses, which was solved by specialized software and with analytical calculations. The strength calculation of shell, tube and tube-sheet of shell and tube condenser is developed in detail according the ČSN EN 13445 standard with special attention to shell and tube process media thermal impact on condenser construction. Based on the performed calculations, the methodology for evaluating the necessity of shell expansion joints of tubular condensers was developed.
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Modelling of pressure equipment bolted flange connections
Kolátor, Matyáš ; Pernica, Marek (referee) ; Létal, Tomáš (advisor)
The bachelor thesis deals with computational modeling of flange connections. Due to its separability, bolted flange connections are a frequently used in piping systems or pressure vessels. For the right functionality of the connection, it is necessary to ensure the required tightness. In order to be able to describe the tightness, it is necessary to know the stresses and deformations in all parts of the connection. These days, standard calculation methods are at a high level of accuracy, on the other hand, in order to achieve this accuracy, they have to follow a lot of corrections, in which the original model based on the strength of material theory should be lost. The aim of bachelor thesis is to create computational models based on the strength of materials theory. Computational models are created to illustrate the application of strength of materials theory. At the end of the thesis, the results using several models will be summarized and compared.
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Tightness evaluation of gasketed tubesheet
Trubač, Daniel ; Pernica, Marek (referee) ; Létal, Tomáš (advisor)
This master thesis focuses on the issue of tightness evaluation of gasketed tubesheet in U tube exchangers, which meets strength requirements of ČSN EN 13 445-3 and ČSN EN 1591-1 standards. It deals with the forces acting on the gasket when measuring the effects acting on the entire heat exchanger. A separate part is devoted to the calculation of the heat profile in the heat exchanger and verification of the strength of the heat exchanger. The final part introduces model of a heat exchanger, on which a possible approach to solving the tightness of the tubesheet in heat exchangers is presented. In thesis temperature field evaluation was conducted, the results of which were used in stress strain analysis, in order to obtain gasket contact pressure. Extreme gasket contact pressures were used to estimate leak rate limits.
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Konstrukční návrh zařízení pro transport vaječných skořápek při výrobě potravinových doplňků
Uhlíř, David ; Naď, Martin (referee) ; Pernica, Marek (advisor)
Eggshells contain a number of important components that can be extracted from them, so they are considered as a promising raw material for further processing. This bachelor thesis deals with ensuring proper transport device for transporting eggshells.The goal of this work is to search for suitable device for transport and to choose the most suitable solution. The appropriate selection is followed by a calculation part, which is made in the programming language Python, and according to which the individual components of the conveyor are selected. The entire device is then modeled in SolidWorks along with the associated assembly drawing documentation.
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Adding value to waste material - eggshells
Zlámal, Filip ; Pernica, Marek (referee) ; Brummer, Vladimír (advisor)
The submitted thesis deals with the utilization of waste materiál – eggshells and the evaluation of this waste raw material to obtain interesting and valuable products. In the introduction of the thesis are described properties, composition and structure of the eggshell rich in minerals and the composition of its membranes. In the next part of the thesis is evaluated potential utilization of this waste as a fertilizer, adsorbent, possible uses in medicine and pharmacy, utilization in electronics, as a catalyst in the production of biodiesel and its further uses.
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Practical comparison of pressure vessels design approaches within ČSN EN 13445
Procházka, Tomáš ; Pernica, Marek (referee) ; Lošák, Pavel (advisor)
This diploma thesis deals with a practical comparison of pressure vessels design approaches within ČSN EN 13445. The thesis aimed to design the device using various approaches described in the European Standard and compare them. For the design was chosen a liquid filter, which works as the first stage of the filtration system in a waste-to-energy plant. In the first part of the thesis is introduced to different routes of design by analysis (DBA), including a description of plasticity conditions and finite element types. These theoretical knowledge are applied in the practical part. The practical part consists of designs of the pressure vessel according to different approaches and methods. The first approach is a design by formulae (DBF), which was done in software Visual Vessel Design. The second approach is DBA. This method of design can be realized according to the European Standard by two routes, either by Method base on the stress categories or so-called Direct Route. Both routes were performed in this work. Stress analyzes were made in programs ANSYS Workbench and NozzlePRO. At the end of the thesis, there is a comparison of used approaches and the resulting values of the design.
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