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Low-temperature biogas purification
Hřebíček, Martin ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
The aim of this thesis is the issue of low-temperature cleaning of biogas. He briefly acquaint the reader with the technology of production of biogas and its possible use. Provide requirements for low-temperature treatment and purification of biogas to the needs of downstream equipment. Provide an overview of the possibilities of suitable production systems applicable cold. Develop your own design facilities for low-temperature treatment of biogas
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Wet surfaces drying using air streams
Gusnarová, Hana ; Hejčík, Jiří (referee) ; Hejčík, Jiří (referee) ; Jaroš, Michal (advisor)
Diploma thesis submit processing and evaluation of experiment which was made at University of Hertfordshire. Aim of this experiment was practically confirm and compare efficiency of drying bottles with blower and compressor. The next purpose was to suggest solution against recondensation on dry surface of bottles. Diploma thesis involves also economy calculation. In the diploma thesis was described issues of drying and condensation, realized analysis of drying equipment and methods of air conditioning. As the most suitable and the most cost effective way of drying was at the base on experiment and energy and economy calculation chosen tested turbo blower 587. As the solution, against recondenzation was created anticondensation tunnel. As the most suitable way for condition the dew point inside the tunnel for require value was chosen desiccant rotor Munters.
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Design of heat exchanger for feeding heat water network 5,5 MW
Kubíček, Ondřej ; Moskalík, Jiří (referee) ; Baláš, Marek (advisor)
The Master thesis deals with the water-heater design for heat-exchange station with total power output 5,5 MW. The goal of the thesis is to make thermal and hydraulic calculation in the extent of the assignment and to develop a projection drawing of the heater along with a correct dimensioning of the shell and flanges. Thesis goals were met according to the assignment. The introductory part of the thesis briefly introduces to the heat-exchanger problematic and selected topics about heat-transfer. Following the basic mass and energy flows calculation inside the heater together with the thermal and hydraulic design determines the size of the heat transfer surface of pipes. After that the design calculations were made, whose results are used to determine the basic dimensions of selected parts and checking the accuracy of designed dimensions. In the last part of the work the design process is more described also with a more detailed description of selected parts.
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Phase Changes on Heat Exchanger Surfaces with Hollow Fibers
Kůdelová, Tereza ; Horák, Aleš (referee) ; Dohnal, Mirko (referee) ; Raudenský, Miroslav (advisor)
The thesis focuses on the polymer hollow fibres heat exchangers. The main object of the research is the formation and process of condensation on the outer surface of fibres and the effect of phase change on the heat transfer. The study deals with the influence of the geometry of the heat exchnager on the heat transfer and the condensation process. Fatigue tests of polymeric hollow fibres exchangers are also part of the work. The work provides an overview of the possible use of such heat exchangers in industrial applications associated with condensation.
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Dehumidifier
Koštuřík, Adam ; Elcner, Jakub (referee) ; Hejčík, Jiří (advisor)
This bachelor thesis shall inform readers with the theory of humid air and its dehumidification at low temperatures. Here are the basic ways to dehumidify the air and then is selected a device that is suitable for low temperature conditions. Humidity problems in refrigerated areas are also described here.
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Steam turbine - condensation formation and discharge
Zouhar, Adam ; Filip, Patrik (referee) ; Fiedler, Jan (advisor)
Master thesis is dealing with the issue of condensate creation and removal from the Nesher Ramle steam turbine during start-up and steady state. At the beginning a preliminary calculation of heat balance and the turbine itself is done. It is followed by description and design of drainage system supplemented by calculation of the steam flow through the orifices. Steam flow calculation was done via S. D. Morris, Pavelek with Kalčík and Ambrož, all three methods were compared. The main goal is the theoretical calculation of the amount of condensate created during start-up which is influenced by its initial state from which it is started. Three default states are considered, cold, warm and hot. In the last chapter the comparison of theoretical calculation with the measured data on real turbine is done and it is supported by the evaluation of the data from the measurement of the steam turbine at steady state on maximum power and half power. From the steady state analysis, percentage of water flow to expander from the total amount of condensate formed in the turbine were obtained.
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Analysis of adhesion of waterproofing systems of self-adhesive asphalt felts
Kerekanič, Robin ; Žák,, Antonín (referee) ; Žižková, Nikol (advisor)
This diploma thesis focuses on the adhesive of asphalt felts on flat roofs. The practical part evaluates on the basis of experiments the adhesion of self-adhesive asphalt felts on conventional system with warm deck. It proposes and experimentally verifies the method for temperature cycling of samples and the system for causing condensation under bitumen sheet. The influence of temperature and humidity on the adhesion of the bitumen sheet during the realization, the subsequent effects of these influences as well as the condensation test are monitored by static loading. The influence of the dynamic load on the adhesion of the waterproofing to expanded foamed polystyrene is also tested. In the discussion and conclusion, the influence of the human factor on the resulting adhesion and the suitability of the methods used are also assessed.
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Hygrothermal processes in walls of wooden houses
Vencel, Lukáš ; Vlach, František (referee) ; Bečkovský, David (advisor)
This diploma thesis solves the problems of hydrothermal processes in walls of wooden houses and associated issues. A chosen were two apartment buildings, where they underwent exmerimental measurement of indor air, in order to determine the boundary conditions commonly boundary building evelope. Was followed by hygrothermal analysis of four commonly used constructions of wooden buildings in the Czech Republic, using various numerical methods. The quantity of information obtained from various numerical methods were analyzed individually. The final part of the thesis is devoted to experimental measurements of diffusion properties of materials. Namely foil vapor barrier, in terms of its influence on the perforation vapor diffusion resistance factor. Information obtained from the experiments were applied to re numerical analysis for walls with a foil vapor barrier. Followed by comparing both cases, in terms of changes hygrothermal behavior of structures with influence of perforation of the vapor barrier.
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Design of Combustion Air Heater
Kareš, Martin ; Šulák, Marek (referee) ; Lisý, Martin (advisor)
This diploma thesis is dedicated to the design of a combustion air heater for a biomass boiler with a water content of over 60%. The first part of the thesis describes biomass and its use in energetics. Furthermore, the stoichiometry of combustion, heat transfer in the exchanger, design of dimensions and air pressure losses are calculated. The last chapter describes the method of air heating regulation.
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Technology for liquefaction gases and its use and distributing
Štěpánek, Jindřich ; Kracík, Petr (referee) ; Škorpík, Jiří (advisor)
This thesis deals with technologies for gas liquefaction and storage. The first section summarizes the development of liquefaction technology using expanders and throttling valves, followed by current technology. This is especially a rotary expanders. The storage technology is the above-ground storage of cryogenic tanks. The thesis includes proposals turbine wheels for liquefaction lines and included two proposals liquefaction cycles.
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