Thesis Abstract This thesis has been performed under co-tutelle supervision between Charles University in Prague (Czech Republic) and Strasbourg University (France). It also profited from the background and cooperation of Institute of Inorganic Chemistry Academy of Science of the Czech Republic and French Commission for Atomic and Alternative energies (CEA Cadarache, France). Results of the work contribute to the OECD/NEA project Serena 2 (Program on Steam Explosion Resolution for Nuclear Applications). Presented thesis can be classed in the scientific field of nuclear safety and material science. It is aimed on the so-called "molten nuclear Fuel - Coolant Interaction" (FCI) that belongs among the recent issues of the nuclear reactor severe accident R&D. During the nuclear reactor melt down accident the melted reactor load can interact with the coolant (light water). This interaction can be located inside the vessel or outside in the case of vessel break-up. These two scenarios are commonly called in- and ex-vessel FCI and they differ in the conditions such as initial pressure of the system, water sub-cooling etc. The Molten fuel - coolant interaction can progress into thermal detonation called also "steam explosion" that can challenge the reactor or containment integrity. Recent experiments have shown that...

Aim of this thesis is construction design of hydraulic control speed close valve steam turbine. Thesis will be contain low pressure and high pressure variant. In a theoretical part will be describe types of steam turbines, speed close valves, basic terminology and description of control elements. There will be also designed hydraulic circuits and performed calculations of individual elements. Finally will be created construction design of low pressure variant.

Pellets from haylage, respectively hay were extruded in an extruder working with a high temperature according to the utility model CZ 21314 with different parameters. The researched parameters of extrusion with a constant time delay were a pressure extrusion and volatile solids. The highest production of methane (CH4) at a fermentation with the temperature 40 °C was monitored from the haylage with a content of the volatile solids 10,6 - 11 % by extrusion with the pressure 1,37 MPa. The highest production of CH4 at a fermentation with the temperature 50 °C was monitored from the haylage with a content of the volatile solids 13,5 - 16,7 % by extrusion with the pressure 1,37 - 1,66 MPa. A kontent of the volatile solids 11,5 % of haylage and extrusion with the pressure 1,35 ? 1,4 were estimated like optimum parameters for a fermentation with the temperature 40 - 50 °C with the highest production of CH4. For evaluation of the effectiveness of investment was used the metod of net present value (NPV). This method is the most commonly used and in most cases the most appropriate.

The thesis deals with the design of the steam turbine for a waste incinerator. First, the concept and design of the machine is discussed. Following part is the steam turbine thermodynamics calculation, which is the main part of the thesis. My work also contains calculation of axial force and a simplified calculation of the gearbox. The design sections of individual modules and drawing of a disposition of a steam turbine are made on the based of the calculation.

The topic of this diploma thesis is a condensing steam turbine with one regulated steam extraction. The first part contents design and balance of heat scheme. The heat scheme is the basis for the main part of this work, which is the thermodynamic design of the turbine with reaction blades. At the end, the characteristics of the turbine are created. Drawing of the turbine section is attached to this thesis.

The thesis is focused on designing of backpressure steam turbine to drive the crusher in the sugar factory having the power input of the 2 200 kW. Thermodynamic calculation of two conceptual variations is gradually implemented in the thesis with the aim to determine the steam mass flow through the turbine. In the first version the control stage is selected as an A-wheel and in the second version as a Curtis wheel. The stage part of both versions consists of series action stages. Furthermore, it contains basic design of the gland steam system and the nozzle control system. Both radial and thrust bearings are designed based on the acting forces. The thesis also includes strength calculation of the selected components. The final part deals with comparison and evaluation of the optimal solution. Due to the small difference in rotor weight (m =19,72 kg), and especially for the less steam consumption (M = 4,87 kg/s), the first version can be considered as an optimal solution. This thesis is amended by a mechanical drawing of the turbine cross section on a common frame with a gearbox.

This thesis deals with the design of a co-combustion gas boiler for coal gas and blast furnace gas mixture. The calculation includes stoichiometry, determinination of the boiler efficiency, steam production rate and heating surfaces sizing. This thesis also includes technical documentation of designed gas boiler. The calculation of the boiler meets the values specified by the scripts and also by documentation from PBS. The boiler was designed for 113.9 MW and 93.77 % efficiency.

Possible modern application of piston steam engine is electricity production using steam made by solar energy. This diploma thesis focuses on designing such piston steam engine Described solution would be effective as an off grid electricity generator, because alternative source of steam could be added for occasions, when sunlight is not powerfull enough for steam production.

The aim of this diploma thesis is a design of a condensing steam turbine based on technical specification of inlet steam - maximal mass flow 120 t/h, temperature 440 °C; on temperature in deaerator 125 °C; on mass flow 0 – 60 t/h and pressure 3,0 bar(a) of regulated steam extraction and on ambient temperature in the vicinity 25 °C. The result contains steam turbine with reaction blading, work output 28,76 MWe and efficiency 82 %.

Topic of this diploma thesis is thermodynamical recalculation of turbine TG3 for different parameters and new design of its blading. Introduction deals with theoretical basics of turbines and their components. Second part explains general reasons for retrofit and then specifically for Heating plant Olomouc, where TG3 is located. Third part includes used calculating methods and formulas. Last part presents results, which were calculated in software MS Excel. A cross section drawing is attachment of this thesis.