National Repository of Grey Literature 26 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Cost-efficient design of high pressure gas pipeline
Šrámková, Veronika ; Pernica, Marek (referee) ; Létal, Tomáš (advisor)
The aim of this thesis was the cost-efficient design of high pressure gas pipeline with a maximum capacity 40 mil.Nm3/day and a length of the pipeline 100 km. The economic design consisted of analyzing and comparing expenses for three different pipelines over a 20-year period. The thesis includes the design of pipe dimensions with proposed thickness of pipe walls according to STN EN 1594: 2014 and ISO 4200: 2010. Software Simone was used in order to determine the pressure loss and the number of compressor stations. Software calculated the necessary power of compressor stations and fuel gas consumption as well. Based on the necessary power, the most economically advantageous gas turbine compressors were chosen for each compressor station. The capital expenditures consisted of the price for compressor stations together with gas pipelines. The operating expenditures for 20 years were added to these costs. In conclusion of the thesis, a comparison of expenditures for all 3 variants was conducted. Based on the results, it can be stated that the most economically advantageous variant of the construction is a gas pipeline with a diameter DN1000.
Development of structural analysis software
Michálková, Anežka ; Buzík, Jiří (referee) ; Létal, Tomáš (advisor)
This bachelor thesis deals with a development of software for strength analysis of truss and beam elements using the Finite Element Method. Firstly, this thesis introduces basic theory of this method which is necessary for development of the software. Next part of the thesis discusses the software itself. Essential feature of development of the software was to transform mathematical theory to uncomplicated algorithms which are explained in the thesis. Last part is dedicated to comparison of the strength analysis results gained from the developed software and from ANSYS Workbench.
Influence of residual stress on pressure vessel part fatigue life
Boleloucký, Václav ; Vincour, Dušan (referee) ; Létal, Tomáš (advisor)
This bachelor’s thesis deals with the impact of a residual stress, caused by an applied cyclic pressure, on fatigue life of a pressure vessel part (flat end–cylinder connection). Bachelor’s thesis includes the design of the pressure vessel according to CSN EN 13 445 regulations, analytical solution in Maple software, from which stresses and deformations are determined. Then the results of the analytical approach are firstly verified by a FEM modelling in ANSYS Workbench software and secondly compared to each other in graphs and discussed. From the values of stresses in FEM, analysis fatigue life expectations are calculated with the respect to CSN EN 13 445 regulations, for two cases. First one, where a pressure test is applied and second one, where the pressure test is not applied before the pressure vessel is put into service. In the conlusion the obtained results are discussed.
Strength calculation of pipe junction
Dohnal, Milan ; Buzík, Jiří (referee) ; Létal, Tomáš (advisor)
The master thesis focuses on the strength calculation of piping with extra consideration given to the local effects of thermal loads. To be recognized as properly functioning, the piping is required to withstand the expected operating conditions in order to enable the continuous transport of the working fluid within the interconnected devices. It is imperative to take into consideration the variable thermal load in the area where the individual pipe branches connect into the main transmission piping. A major part of the thesis is concerned with the assessment of the expected workload influence on the most stressed parts of the system. The data are gathered by employing temperature and stress-strain analyses carried out in the ANSYS Mechanical program using the finite element method. The values based on the analyses are cross-checked with both the permitted values according to the ASME standard B31.3 Process piping and the ASME Boiler and Pressure Vessel Code stress categorization method. Since all the evaluated stresses are below their respective permissible values, the piping strength is concluded as satisfactory according to the standards.
Integrity breach analysis of storage tank using FEM
Ševčík, Martin ; Vincour, Dušan (referee) ; Létal, Tomáš (advisor)
This master thesis is focused on computational modelling of critical external as well as internal pressure acting of the repaired tank. During cleaning of pipelines, the gas mixture entered into this storage tank causing loss of integrity in the connection between the roof and the shell. The first part of the thesis is focused on check calculation of the shell in exceptional conditions. The next part describes the repair of the tank including check of the pillar according to ČSN EN 1993 1 1 and ČSN EN 1993-1-6. The main part of the thesis is focused on determination of the buckling resistances of the tank in original as well as repaired state using ANSYS Mechanical software. The results are comparable with original tank, whose buckling resistance was not decreased due to the repair.
Design check calculation of piping according to ASME B31.3
Dohnal, Milan ; Dohnal, Miloslav (referee) ; Létal, Tomáš (advisor)
The thesis is focused on check stress analysis of an already constructed piping system, which constitutes a key element in the transport of process fluids, especially liquids. Properly functioning piping is required to withstand the anticipated loads, both in the test and in the operating conditions. For the resistance assessment, ASME codes were used, especially ASME B31.3, which is widely used in the industry worldwide.
Design of autoclave
Poduška, Libor ; Létal, Tomáš (referee) ; Nekvasil, Richard (advisor)
Master thesis deals with general basic design od autoclaves. It deals with the design of an optimal design solution autoclave to set parameters with the design requirement of hermetic doors for loading the workpiece. This solution is analyzed regard to stable pressure vessels. The whole design is processed in parametric SolidWorks software with which they are executed and initial stress analysis of individual designs. Final strength FEM analysis is performed using Ansys. Some proposals are technical-economic evaluation.
Nonlinear buckling analysis of a flue gas pipe
Jelínek, Jan ; Vincour, Dušan (referee) ; Létal, Tomáš (advisor)
This thesis deals with the nonlinear analysis of stability loss of flue gas pipe. This pipe is a part of desulphurization line. The thesis describes the creating of a simplified FEM model. It also describes the setting of the boundary conditions of the model for few loading cases. These cases differ by preference for one of the load as dominant. There are proposed several variants of stiffening by light ring stiffener. The work is finished by comparing the resistance to the stability loss of the reinforced variants and unreinforced model of flue gas pipe.
Influence of thermal shocks on fatigue of pressure equipment components
Umlauf, Martin ; Vincour, Dušan (referee) ; Létal, Tomáš (advisor)
This thesis examines influence of thermal shock on fatigue of pressure equipment components. The paper relates to project of IMI CCI Brno, which is a leading manufacturer of valves for the energy and process industries. Analysis concerns the impact of thermal shock concentrating on high pressure part of the steam valve. And proposal for a new valve geometry that reduces machining operations and reduce financial costs of production. First part of the thesis presents a basic review of fatigue damage components concerning mechanical loading and thermal – mechanical loading. Second part of the study creates FEM model of the valve. FEM model simulate temperature field and stress during thermal shock. Influence of thermal shock to fatigue damage was computed on basis of stress tensor obtained from FEM simulation under Chapter 18 of the standard EN 13445-3. Existing valve geometry was verified and the new geometry was proposed that simplified and reduce financial costs of production.
Software Aided Design and Assessment of Shell and Tube Heat Exchangers
Létal, Tomáš ; Klemeš,, Jiří (referee) ; Vincour, Dušan (referee) ; Jegla, Zdeněk (advisor)
Subject of this work is a development of an integrated software environment for mechanical design and check of shell and tube heat exchangers. Processes of mechanical design and checks well as software which perform these processes are broken down to basic methods and parts. Mechanical design is usually performed according to some standards. In this work, ČSN EN 13445 is used. This standard describes mostly design check calculations which can be easily algorithmized. On the contrary, design calculations are described to some extent in few simple cases and mechanical design of shell and tube heat exchanger has not been fully algorithmized yet. Subject of this work is design of software, which will be capable of automatically performing mechanical design from datasheet as an input. Based on breakdown of design and check processes, requirements for key software features are derived. Important part of presented work is design and implementation of key modules – data model of shell and tube heat exchanger, module for mechanical design check according to ČSN EN 13445. These modules form basis of the software which will be developed further in future work.

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