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CONSTRUCTION AND TECHNOLOGICAL PROJECT OF PREPARATION AND IMPLEMENTATION OF THE HOTEL AT VALEČ CASTLE
Petrů, Václav ; Jílek, Jan (referee) ; Mohapl, Martin (advisor)
This master thesis deals with the construction of a new hotel building in the Chateau Valeč complex. This building will serve as a garage, restaurant and accommodation facilities. The building is located on the outskirts of the village of Valeč. The thesis contains a technical report of the object, a situation of the building with broader relations of transport routes, a time and financial plan of the construction, a study, a project of the construction site equipment, a design of the main construction machines and mechanisms, a time schedule, an item budget, a technological regulation, a quality control and testing plan and occupational health and safety. The thesis deals with sprayed polyurethane foam, which serves as a thermal insulator. The thesis also describes the heating system and energy sources for the building.
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Combined heat and biogas production using a bioreactor
Novák, David ; Radil, Lukáš (referee) ; Baxant, Petr (advisor)
This diploma thesis deals with the bioreactor system and its use for the production of heat and biogas. The bioreactor uses the composting and metanogation process of fermentation that humanity has known for hundreds of years, but the combination of these processes is a relatively unexplored area. The theoretical part of the thesis analyzes the existing possibilities of utilization of the heat generated in the compost, and also describes the used technology of small biogas stations and other small systems for biogas production. It follows the practical part of the work, when it was the task to design a bioreactor working at low temperatures during the winter. Part of the solution is the initial design and testing of the basic test structure of the bioreactor, followed by the implementation of a more advanced and more complex system, including a control and measuring center realized by a microcontroller.
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Utilization of biomass energy
Horváth, Martin ; Bok, Jaromír (referee) ; Procházka, Zdeněk (advisor)
Restoring sources of a energy and their development brings questions how these can be these sources the best utilized. The main aim of my bachelor`s thesis is an acquainted with methods of biomass conversion to energetic potential and his advantage. Than is mentioned proper project of the biogas plant and calculation of produced electric energy quantity in select cogeneration unit base on data on specific excrements production bred pigs and biogas production from slurry. The result is a variant evaluation of economy of the biogas plant operation for agricultural enterprise according to number of bred pigs and possibility of electric energy utilization.
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Energy use of biomass
Ošťádal, Michal ; Elbl, Patrik (referee) ; Baláš, Marek (advisor)
The main aim of this bachelor thesis is to search for technologies for biomass conversion with subsequent energy utilization. At the beginning of the work is analyzed the nature of biomass as an energy source. The next part deals with individual technologies. The following section deals with combustion and biogas chains. The penultimate chapter deals with chosen energy sources. The last chapter is statistical processing of emissions, mining, electricity and heat production from renewable sources and biomass.
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Monitoring and control of processes in biogas plants
Trubač, Daniel ; Vondra, Marek (referee) ; Máša, Vítězslav (advisor)
This bachelor thesis focuses on the issue of management of biogas plants. It deals with the creation of biogas and the functioning of the biogas plant. A separate part is devoted to the description of factors influencing the efficiency and stability of the fermentation process and the methods of their measurement. The final part introduces the latest technologies in the field of monitoring and control of biogas plants. The use of decision support systems in biogas plants seems to be a very promising direction for further development.
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Fermentation of biogas plants
Mrůzková, Karolína ; Vičíková, Magda (referee) ; Svěrák, Tomáš (advisor)
This bachelor thesis deals with the study of biogas plant technologies, mainly those based on the wet anaerobic digestion. In the experimental part of the thesis, biogas yield of the substrates (corn silage, corn hominy, pig slurry, poultry droppings, sugar beet pulp) is measured in a fermentation test. Based on the real biogas yields of a particular biogas plant, where the determined substrates are used, the relative error of the fermentation test was calculated.
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Biogas plants
Hudečková, Eva ; Moskalík, Jiří (referee) ; Fortelný, Zdeněk (advisor)
This thesis deals with biogas plants. In thesis are described suitable inlet feedstock for anaerobic fermentation, described proces of fermentation and there are mentioned basic elements of biogas plant. In next part of thesis was described concrete biogas plant and there were worked out energy and economic balance. In simplicity there were calculated return of investment and economic benefits for farm.
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Biogas Plant Telč
Novák, František ; Hubáček,, Petr (referee) ; Myslín, Jiří (advisor) ; Skála, Jiří (advisor)
The biogas plant in Telč. Administrative and laboratory building is located on the premises of a biogas plant on the outskirts of Telč in the field of science and technology park. Half of a two-storey building will be used for laboratory tests which, under different operating conditions and settings will test changing input of crops, optimization of these parameters in different technological settings to maximize energy output. It will also be a place of management of biogas plant. The building is located in a slightly hilly terrain at an altitude of 539,350 meters and complies with disabled access.
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Equipment for Thickening Waste Water from Biogas Plants
Vondra, Marek ; Bébar, Ladislav (referee) ; Hoffman,, Pavel (referee) ; Stehlík, Petr (advisor)
This dissertation thesis deals with the development of technology which could tackle two major issues related to biogas plants. These issues concern the insufficient use of waste heat from biogas combustion and its subsequent processing. It also concerns the use of the fermentation residues which are formed in large quantities and whose use is restricted by law. Based on a literary search of separation methods, a vacuum evaporator was selected as the most suitable technology. Its advantages include its simple construction, operational reliability and robustness, low costs of thickening medium pre-treatment, potential for a quick commercial application and, especially, the chance to use a low-potential waste heat. A primary purpose of this technological unit is the reduction in the volume of fermentation residues. Other benefits include the efficient use of waste heat from a biogas plant, which would otherwise be wasted. Evaporators with a low consumption of electrical energy (which is a main product of a biogas plant) seem to be the best option for applications in the biogas plants. Three of these technologies were subjected to a more thorough analysis, which included the development of computational models and their quantification for conditions in a sample biogas plant. A one-stage evaporator with a forced circulation (680 – 712 kWhth/m3, 25.9 – 30.5 kWhel/m3) was evaluated as the least suitable option in terms of energy demands. The energy intensity of a three-stage evaporator with a falling film (241 – 319 kWhth/m3, 12.0 – 23.6 kWhel/m3) and a nine-stage flash evaporator (236 – 268 kWhth/m3, 13.6 – 18.4 kWhel/m3) is significantly lower. A multi-stage flash evaporator (MSF) was then chosen for development and will form the central focus of this thesis. The reasons for the choice are as follows: the low requirements on the heat transfer surface, good operational experience in the field of desalination, its simple construction, modularity and evaporation outside the heat transfer surface. A thorough technical-economic evaluation was also performed on the integration of the evaporator into the biogas plant. The main part of the work included the experimental development of a MSF evaporator prototype. The main objective of this development was to achieve a stable flow rate of the thickening liquid digestate fraction and the continuous formation of the distillate. This was not an easy objective to achieve, especially due to the properties of the liquid digestate, which has a non-newtonian characteristic and increased density and viscosity compared to water. The tendency of the liquid digestate to form foam was also the subject of analysis. The development of the evaporator and first successful operational test are described in the thesis in detail. This required the use of an anti-foaming product. A fully-developed prototype of the MSF evaporator allowed us to achieve continuous operation with a distillate production, reaching from 5 to 10 kg/h at a liquid digestate flow rate of 0.4–0.5 m3/h. The main drawback of this technology is the pollution of the distillate with ammonia nitrogen, and it is for this reason that the basic procedures of its subsequent elimination was selected for further analysis.
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Estimation of biogas production in biogas plant
Heger, Jan ; Vondra, Marek (referee) ; Touš, Michal (advisor)
The focus of this thesis are calculation methods for biogas yield estimation in biogas plant. The aim is to get acquainted with calculation methods and to determine their accuracy by calculation. Refining biogas production estimates can be useful for case studies, feasibility studies, or technical-economic assessments. The available calculation methods are tested on a case study where a comparison with the operational data measured in the biogas plant in Valašské Meziříčí is accomplished using the extended Buswell method and tabulated values. Comparing this case study, a result was obtained where the calculation by the Buswell method reached very accurate values, whereas the calculation by tabulated values differed more from the measured values and the method achieved a less accurate result.
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