The master thesis deals with design and comparison of condensing steam turbine for steam-gas cycle for single-cylinder and double-cylinder body with air condenser at its end, one regulated take and ability to use additive steam. Thesis is based on the calculation of thermal scheme which is followed by a preliminary and subsequently a detailed design of steam turbine. Thermodynamic efficiency for single-cylinder turbine was calculated at 93,28 % with terminal power 136,2 MW. The design procedure was repeated for a double-cylinder body. Calculated terminal power for two-cylinder turbine was 134,4 MW with thermodynamic efficiency of 92.1%. By dividing turbine into two rotors resulting low-pressure turbine has a smaller rotor diameter, a longer blade and at the same time a larger number of stages. For double-cylinder turbine, it was necessary to consider twice the number of seals and radial bearings. Due to the increase in flow diameter of low-pressure turbine, losses related to the geometry of the stage increased. Thesis is supplemented by a section drawing of steam turbine with higher efficiency.

The aim of the diploma thesis is to contribute to solve current problems in controlling in the civil engineering firm. I put main accent on using right instrument of controlling for specific company. Diploma thesis analyzes controlling proces in company OHL ŽS, a.s. In introduction is defined the concept of controlling and its theoretical principles. In other parts of the diploma thesis is described current sutuation of controlling in the company. In concrete example are showed proposals of possible improvement in the controlling of buildings, mainly in realization part of the building.

This thesis concerns with recalculation of steam boiler. Arrangement for reaching of new steam boiler parameters and temperature of combustion gases was suggested at first. Then it was verified with thermal calculation, all necessities included.

This diploma thesis deals with proposal and construction of feeding mixture bin in two variants. The variant No. 1 has a capacity 53m3 with hopper angle 60° and the variant No. 2 has a capacity 45m3 with hopper angle 45°. The proposal of both variants of feeding mixture bin was worked out according to parameters of assignment and technical literature. Further it was made a calculation of wind load, snow load and a power reacting on bearing structure of bin in direction of thoroughfare. Technical documentation consists of configurations variant No. 1 and 2, chosen welding subassemblies and details of parts of variant No. 1 of feeding mixture bin.

The Diploma Thesis deals with a design of a backpressure turbine without any bleeds. The fundament of the Diploma Thesis is a thermodynamical calculation of particular parts of the turbine. Technical solutions are designed according to given details of a steam and chosen conditions of use.

This thesis aims to gas installation of the coal boiler and its thermal recount. In the first part, there is implemented calculation of the combusting chamber. After that follows the recalculation of heat exchange surfaces and proposal tube air heater, which will replace the existing air heater Ljungström. The emphasis is placed on the preservation of the exsiting steam parametrs and keeps emission limit of NOx.

This masters thesis deals with the gasification of current oil boiler. The first part of the thesis describes the existing boiler. The next part follows gasification with respect for comply with the limits of NOX and recalculation of boiler for operation with the natural gas.

This master’s thesis deals with design of technological system for heating and process steam generation. The source of energy is a cogeneration unit. The thesis is divided into several parts. The first part is design of technological system and description. The second part is realized stoichiometric calculation and the thermal balance of steam boiler. The main part of thesis is design of the waste heat steam boiler. The thermal calculation, aerodynamic calculation, hydraulic calculation and strength calculation were made. The thesis also includes the drawing of designed waste heat steam boiler.

Ga2O3, which is a novel and ultra-wide band gap oxide semiconductor material, has attracted more and more attention due to its chemical and thermal stability and various potential applications to devices. This dissertation focuses on systemic investigation of β-Ga2O3 and ε- Ga2O3 from fundamental material properties, device modeling and verification of circuit performance. ab initio calculation was employed to do theoretical investigation of material properties. Based on Generalized Gradient Approximations (GGA), we calculate the band structure, effective mass of electron, density of states and phonon band structure. However, calculated band gap is only 2.36 eV and 2.16 eV, which is much lower than experimental measured value. In order to overcome the underestimation, the GGA+U method was carried out for both materials. band gap as 4.8 eV and 5.0 eV are finally identified, which have a good agreement with experimental results. Device simulation is done with Monte Carlo (MC) method and Drift-Diffusion method. Firstly, we used traditional ensemble MC to calculate the mobility of bulk material. We found conventional phonon scattering model cannot capture electron-phonon interaction (EPI) very well due to complex phonon structure of β-Ga2O3. Therefore, a refined MC method was proposed. By including multi-phonon scattering model, the refined MC works very well with multi-phonon modes EPI. The calculated mobility of bulk material is 118 cm2/(V•s), which is close to measured 120 cm2/(V•s). Using obtained mobility, the performance of depletion-mode β-Ga2O3 MOSFET was simulated in Silvaco TCAD.

Shallow Tunneling through highly populated areas of big cities is a challenging task. Almost in all the tunneling projects of shallow tunnel some or the other types of tunneling problems have been encountered and are still being faced. The stability of shallow tunnel is also influenced by many factors, primarily the in situ stress, geological structures, groundwater, rock mass quality, shape of tunnel etc. The design of shallow tunnel in past was almost purely a matter of experience. During last decays computational methods have been introduced as powerful design aids tool to arrive at safe and economical shallow tunnel structure. The purpose of this thesis work is to provide technical criteria and guidance for the design, and stability of Norra Länken shallow tunnel in rock for civil works projects. The design of shallow tunnels in highly dense areas is an iterative process. A good starting point is essential to the process and facilitates safe and economic design. Currently there are many practical two and three-dimensional software tools available for carrying out the task. This master thesis provides an overview of a methodology being used by tunneling experts, which captures the three-dimensional essentials of tunnel behaviour with two-dimensional analysis tools, PLAXIS. Though it is not a full and final situation and conclusion, but there is a lot to learn from such conditions .