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Rotační sušící a sintrovací pece / Rotary drying and sintering kilnsRafaj, Svatomír January 2018 (has links)
This thesis deals with rotary drying and sintering kilns. The first part focused upon construction of the kilns, kiln processes and the options of technological arrangement of the kilns. The thesis second part presents two experiments. The first one is targeted to find the relation between residence time, kiln rotary speed and kiln slope in longitudinal direction. The examinations analysed individually the relation between kiln rotary speed and residence time and the relation between kiln slope and residence time. Finally, the regression equation describing the relation between holding time, kiln rotary speed and kiln rake was established. The results given by regression equation much closer to the real one then the results given by literature. The difference between real residence time and the regression one is about one minute. The second one is concerned with producing a set of equations with respect of mass and heat balance in case of drying process. The input material was wet crushed tetra packs. There were established technological conditions of the material, necessary burner energy input, heat losses and distribution of heat between material and flue gas. There were taken away almost 80 percent of heat energy by flue gases. The remaining 20 percent was divided between latent heat, material and heat losses through the shell of the rotary kiln.
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Návrh koncepce tepelné elektrárnyZbořil, David January 2020 (has links)
This diploma thesis deals with the design of a thermal scheme of steam power plant. The introductory part of the thesis is dedicated to theory about thermal power plants, especially those with supercritical steam parameters. In the following parts, there is a design of the thermal scheme of the coal burning power plant. First separate parts, then all interconnected. The last chapter deals with energy and media balance involved in the process.
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Analýza vlastností výplní otvorů vzhledem k infiltraci ve stavbách / Analysis of properties of openings with respect to infiltration in buildingsZapletal, Miroslav January 2020 (has links)
The dissertation thesis is primarily focused on the analysis of the properties of openings constructions with respect to infiltration in constructions, specifically related to the permeability of opening fillings and the permeability of buildings. The main aim of this work is to find out how the overall air permeability of a building can be influenced in relation to the openings and their properties, which are related specifically to the air permeability at the specified tightening degree of the used all-round fitting. In relation to the overall air permeability of the building, the energy balance of a particular building will be calculated in cooperation with the determined results of the air permeability of the building at a defined degree of tightening of used all-round fitting at levels 0%, 50% and 100%. The results of tests and measurements will be reflected in a concrete calculation of the energy balance of the assessed building in the form of numerical simulation.
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Kondenzační parní turbina / Condensing Steam TurbineVíšková, Jaroslava January 2012 (has links)
The theme of this master thesis is one body steam turbine of 150MW with reheat. There is calculated heat balance of the system with three low pressure heaters, deaerator and two high pressure heaters. Next part deals with calculation of blades and its lenght. Next are the attachments of blades into stator and rotor parts of the turbine. By the end of the thesis there is recalculation of heat balance scheme and blading followed by calculation of parameters for operation of turbine in 75% and 50% of the rated power output. The output of the whole thesis is drawing of horizontal cut of the turbine.
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Energetická bilance tvarů kmitání lopatky poslední řady parní turbíny / Energy balance the blade of the last stage steam turbineHorák, Petr January 2012 (has links)
Created methodology for calculating the potential deformation energy parts is described in this thesis. Calculation method uses the outputs of modal analysis, which is performed using computational modelling. The potential deformation energy parts are calculated for three cases. Two benchmark problems and one case of blade model. Blade geometry is received by 3D scanning and reconstruction of given specimen. Results of the potential deformation energy parts calculations are analyzed and conclusions are formulated.
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Purchasing Power Parity (PPP) Deviations: The case of Zimbabwe and it’s five neighbouring countries (1997 – 2016).Mudavanhu, Tinashe January 2019 (has links)
Economic decline in Zimbabwe has manifested in several ways, one of which is in the form of persistent trade deficits. This is not unique to Zimbabwe alone, with trade imbalances also extending to its neighbouring countries. The purpose of this study is to investigate whether PPP deviations can be used to manage bilateral trade balances in such a way that parties concerned benefit from the trade proportionally. The literature review analysed research done on the validity of PPP theory in developing and developed countries all over the world. Studies generally confirmed that the long-run PPP holds strong for developed countries and weak for developing countries. The study makes use of secondary yearly data from international financial institutions and employs unit root tests and the Engle Granger cointegration test to investigate the Purchasing Power Parity theory. In addition, Granger causality tests were also performed on the observed deviations and trade balances to find out if a relationship is present. It was noted that PPP theory does not hold between Zimbabwe and its neighbouring countries (Botswana, Namibia, Zambia, South Africa, and Mozambique). As such, PPP deviations cannot be used to improve bilateral trade balances between Zimbabwe and its trading partners.
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Vodní režim rekultivovaných a nerekultivovaných výsypek / Water regime of reclaimed and nonreclaimed heapsCejpek, Jiří January 2011 (has links)
Summary: Great Podkrusnohorska spoil heaps in the Sokolov region in Western Bohemia is the largest spoil heaps in the Czech Republic, which was pour million tonnes of overburden soil surface mining of brown coal. The thesis is setting on the basic characteristics of the water regime and water balance of spoil heap soil and thus follows a series of previous works dealing with the comparative development of the reclaimed and unreclaimed area. The areas are long-term monitoring of soil moisture using a dielectric soil moisture meter total water regime was monitored by subsurface with gravitation lyzimeter, runoff and throughfall rainfall. Older unreclaimed plots as well as reclaimed plots have higher porosity, water field capacity and moistre than young sites, however there are limited by water deficiency in similatr way as young sites due to increase in wilting point. Keywords: Spoil heaps, Recultivation, Soil humidity, Water supply, Water balance
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Hodnocení přesunů zátěže životního prostředí mezi státy a regiony prostřednictvím indikátorů materiálových toků / Assessment of shifts of environmental pressure among countires and regions by means of material flow indicatorsMaric, Andrija January 2012 (has links)
World regions are becoming more connected by every day and as a consequence of that dependence rises among states. The states become specialised in production of certain type of the product, services etc. Subsequently they turn to be even more dependent. One does not need to go further back then real-estate crisis in USA that spilled over worldwide. The world is turn out to be "smaller place". America and Europe are exploiting raw material less and less and become dependant on the import of those from around the world. Former exploitation and production became ballast to the environment [environment burdens]. One day factories and mines were closed or reorganised to different production activity and doing so reduced burden to the environment. The consumption of the product remained or was increased even more. In other words, some one else is producing that product. The production shifted among states moving the environment burdens with it. The aim of this document is to provide an overview of impacts relevant to the use of metals zinc, aluminium, nickel, iron and tin; quantification of physical import and export and calculation of international trade balance of before mentioned metals and analysis of six ores. Those aims are supposed to assist us on answering questions to which extent Czech...
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Dodatečný ohřev plazmatu výkonovým svazkem atomů deuteria na tokamaku COMPASS / Additional plasma heating of tokamak plasma by powerful beam of deuterium atoms on the COMPASS tokamakBogár, Klára January 2021 (has links)
Two neutral beam injectors (NBIs) were installed on the COMPASS tokamak as a main upgrade after its move from the UK to Prague. The thesis deals with general experimental specifications of additionally heated plasmas by the NBI under the wide range of conditions on the COMPASS tokamak. The geometrical parameters of the beams are determined from the spectro- scopic measurements. Consequently, the NBI power passing through the narrow duct connecting NBI and tokamak chamber is investigated. The passing fraction of the NBI power is confirmed by the power balance analysis, which provides information about the delivered power into the plasma based on the plasma parameters. Once the delivered power is well known a description of beams interaction with plasma via global parameters such as the plasma temperatures, the plasma density, the energy confinement time and neutron yield is given. It is shown, that the NBIs heat mostly ions, which can reach ∼ 1 keV in the plasma core. Moreover, the impact of the fast ions presence on the commonly observed MHD activities, the sawtooth instability and the edge localized modes (ELMs), is discussed and compared with results from other tokamaks. The sawtooth period is prolonged by the influence of the NBI from 2 ms up to 4.5 ms. The knowledge of the NBI passing power into...
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Vnější ekonomická rovnováha České republiky / The external economic equilibrium of the Czech republicŠedivý, Ctibor January 2011 (has links)
This thesis focuses on the theoretical conception of the Balance of Payment, its method of adjustment and stress the development of the Czech republic's Balance of Payment in period 2000 -- 2010 via analytical-descriptive approach. It defines its basic terms practical relations within framework of the horizontal and vertical outlook. Thesis's Attention is spread out between status and flow quantity. Thesis is also consist of three boxes that contain a short profile of intertemporal approach to the Common Account, sustainability of investment position and excursion to the essential theories of foreign currency exchange rate that is related to the Balance of payment tight. The end is dedicated to the "traditional" indicators of external equilibrium of the Czech republic in pre-monetary crisis era and in the present.
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