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Turbine efficiency as a function of speed
Woffová, Helena ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
The subject of the thesis is condensing steam turbine with the required power of 50MWe and set input and output parameters. The turbine is designed as a two-body turbine. There is also designed balance scheme with reheating, regeneration and air condenser. Subsequently, the thermodynamic calculation for three variations of high pressure part with different speeds is demonstrated. The result is evaluated in terms of calculated efficiency and also in an economic point of view. The output is a selection of the variation with the best parameters. Then the basic dimensioning calculations, the design of the leveling piston and the sealing system follows for this variation. A simplified section of this part is drawn. Finally, the balance scheme is adjusted based on the data and calculated for limited performance as well.
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Brake mean effective pressure of an internal-combustion engine for passengers cars and motorcycles
Vopršal, Oldřich ; Svída, David (referee) ; Drápal, Lubomír (advisor)
The aim of this work is to discuss the meaning, definition and mapping of the characteristics of the value of the mean effective pressure depending on the historical development of internal combustion engines of automobiles and motorcycles from the initial concepts to the current development. In this work I want to compare and evaluate the values of the mean effective pressure for non-supercharged and supercharged piston combustion cars and motorcycles. Part of the work will be a graphical representation of the values of mean effective pressures and subsequent analysis and evaluation of the values against the design concept of the internal combustion engine in the historical period. Furthermore, a description of the structural elements that contribute to the increase of the mean effective pressure.
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Analýza výstupních parametrů traktorových souprav na zpracování půdy
Řihák, Pavel
The diploma thesis is called Analysis of the output parameters of tractor’s sets to processing land. It is focused on overview of technologies in processing land. The first part is focused on the main machines and their parts used in the classical convention and the minimization farming of land. Each chapter is supplemented for graphic overview suitable illustrations of machines and tools. The second part of this thesis includes methodology of terrain measurement tractor’s set the Case IH Puma 230 CVX and cultivator the Lemken Karat 9 in processing land focusing on the influence of output values at different setting parameters. At tractor’s set were followed output values such as fuel consumption, slip of wheels, revolutions engine, working time, rotation time, speed. The efficient and operational performance and fuel consumption of the set were calculated from ascertained values. This chapter describes in detail hydrostatic gearbox of CVX tractor Case IH Puma. The conclusion of this work is the evaluation full issue.
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Brake mean effective pressure of an internal-combustion engine for passengers cars and motorcycles
Vopršal, Oldřich ; Svída, David (referee) ; Drápal, Lubomír (advisor)
The aim of this work is to discuss the meaning, definition and mapping of the characteristics of the value of the mean effective pressure depending on the historical development of internal combustion engines of automobiles and motorcycles from the initial concepts to the current development. In this work I want to compare and evaluate the values of the mean effective pressure for non-supercharged and supercharged piston combustion cars and motorcycles. Part of the work will be a graphical representation of the values of mean effective pressures and subsequent analysis and evaluation of the values against the design concept of the internal combustion engine in the historical period. Furthermore, a description of the structural elements that contribute to the increase of the mean effective pressure.
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Sensors and Actuators for Combustion Engines
Prouza, Jiří ; Prokop, Aleš (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is concerned with a summary of the most important sensors and control members which are used for combustion engine. There is a description of the construction and the principle of function of each sensor and member in this thesis. The first part of this thesis is concerned with sensors, which scan a condition and a course of activities in an engine, transform them to a signal and afterwards send them to the control unit, so it could process them. In the second part of this thesis there is a description of control members which process information from the control unit and afterwards transform them to a mechanical movement.
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Manual pumps
Matis, Michal ; Šedivý, Dominik (referee) ; Štigler, Jaroslav (advisor)
This thesis describes manual pumps. It contains research about history of usage of these pumps, further it deals with some pumps used today (construction, materials, pros-cons). Also it is pointing out on pumps in developing countries, which are used in places with lack of drinking water. In practical part is described design procedure of pedal-powered pump.
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High-speed Steam Turbine
Vitovská, Michaela ; Trojan, Aleš (referee) ; Trojan, Aleš (referee) ; Fiedler, Jan (advisor)
The diploma thesis deals with the design of a high-speed steam turbine at given parameters provided by G-Team a.s. in Velka Bíteš. The introductory part briefly focuses on historical development of steam turbines, their operational principle and process of energy transformation. In the main part the machinery analysis of high-speed turbines has been carried out. In addition, a preliminary design of the number of turbine stages has been done. Furthermore, a thermodynamic calculation of flow channel for given input and output paramaters has been done together with the conception of construction design and turbogenerator layout. The final part introduces technical comparison of a one-stage and multy-stage high-speed steam turbine.
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Effect of engine load on the output parameters of the tractor kits
Paulmichl, Roman ; Svída, David (referee) ; Bauer, František (advisor)
The thesis deals with the current situation in the construction of tractors, particularly engines and accessories. The work includes a methodology for measuring tractor rigs in traffic as well as methodology for plough/plow kits measuring. The measured values were tabulated, graphically presented and analysed. The thesis provides an overview of the issue of the combustion engine load placed on the engine by working conditions in transport, during primary soil tillage with different modes of operation of the tractor set. The thesis aim is to find out the practical effect of the engine load on the monitored parameters and to indicate possibilities for achieving higher efficiency in tractor units with minimum fuel performance
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High-speed Steam Turbine
Albrecht, Jan ; Škorpík, Jiří (referee) ; Fiedler, Jan (advisor)
Main aim of presented master thesis is focused on construction of high speed steam turbine. Steam turbine is designed based on parameters of waste incineration plant in Brno. First chapters shortly summarized historical development, transformation process and work principal of steam turbine. Consequently on first captures is in depth described impulse and reaction blading including expansion in i-s diagram and basic equations for efficiency calculations. In major part of master thesis is firstly discussed conceptual possibilities of turbine application for given parameters. Based on chosen concept is compiled algorithm for thermodynamic calculation for each turbine module. Simplify calculation of gearbox is included as well. Based on calculations are compiled construction drawings of all parts of steam turbine.
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Plain Bearings for CI Tractor Engine
Petr, David ; Ramík, Pavel (referee) ; Dundálek, Radim (advisor)
This thesis deals with the hydrodynamic plain bearings tractor diesel engine. The first part is closer acquainted with the hydrodynamic bearing, its principles and materials used. The next part work deals with the multibody system adams-engine. The main part of this work is to model the crank mechanism and its storage in hydrodynamic bearings in the MBS program and the subsequent simulation under different operating conditions.
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