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Waste-to-Energy in the Czech Republic
Rajkovič, Jaroslav ; Toman, Filip (referee) ; Lachman, Jakub (advisor)
This bachelor’s thesis is focused on Waste-to-Energy process of municipal waste in the Czech republic. It describes production of municipal waste in the Czech republic, influence of waste composition on burning process and principle of incineration technology. The largest attention is paid to current Waste-to-Energy plants in the Czech republic and new planned projects. Last part of the thesis evaluates fulfilment of Waste management plan of the Czech republic goals.
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Hydrothermal Conversion of Biomass
Vařejka, Tomáš ; Elbl, Patrik (referee) ; Lachman, Jakub (advisor)
The main aim of this bachelor thesis is to search for hydrothermal technologies for biomass conversion to improved energy carriers. First part includes contains introduction to biomass conversion methods and its suitability for different types of feedstock. The following part is dedicated mainly to hydrothermal conversion processes, their history, development over time, used technology, process and product characteristics and comparison with conventional thermochemical methods. Finally, the current state of technology is evaluated, possible future developments are outlined and current problems which are preventing wider application of this technology are descried.
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Monitoring the effect of sample treatment in determining selected properties of biofuel
Štenclová, Kristýna ; Lachman, Jakub (referee) ; Lisá, Hana (advisor)
Diploma thesis is focused on the treatment of biofuel prior to combustion and effect of this treatment on the biofuel characteristics. The first part is a review of literature encompassing characteristics of fuel, preparation of samples, methods of analysis of individual characteristics and a presentation of various types of mills. The second part of thesis is experimental. It is an analysis of sample characteristics under various mill settings with regard to the temperature in the mill during grinding.
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Use of agromaterials for heating houses
Kudová, Anna ; Lachman, Jakub (referee) ; Baláš, Marek (advisor)
This bachelor thesis focuses on the biomass usage for energy generation in particular on comparison to wooden between hay pellets. First part is dedicated to fuel attributes, solid fuel boilers and pertaining legislation. Second part deals with an experiment which compares burning of both types of pellets in an automatic hot water boiler. The proximate analysis of fuels is conducted as well.
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Energy use of waste
Lachman, Jakub ; Kracík, Petr (referee) ; Baláš, Marek (advisor)
The bachelor’s thesis deals with the Waste-to-Energy topic. The first part evaluates municipal solid waste (MSW) as fuel, analyzes the influence of its indiviual fractions on the overal properties, mainly the lower heating value, compares MSW with other conventional solid fuels which are thermally used. The second part of the thesis deals with Waste-to-Energy technologies. It is divided into three parts: combustion, pyrolysis and gasification. Each contains both the description of the process itself as well as the description of the applied technology. The last chapter contains some of the negative impacts of Waste-to-Energy technologies and a list of measures used to deal with them.
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Effect of sample treatment on biofuel characteristics
Zlevorová, Tereza ; Lachman, Jakub (referee) ; Lisá, Hana (advisor)
The subject of this bachelor thesis is experimental solution of the problem focused on the effect of sample treatment on bioful characteristics. The theoretical introduction includes biofuel classification, explanation of each biofuels‘ trait and description of methods used to their determination. It continues with sample preparation with broader focus on milling. The following experimental part examines basic traits of four materials before and after milling on high-speed rotor mill using multiple sieves of varying fineness. The traits were determined using normalised methods. For determination of moisture had been selected gravimetric method. In this thesis, there is described every procedure and following calculations. The results are stated in tables and processed in graphs.
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Design of heat source for heating a family house
Kotráš, Pavel ; Lachman, Jakub (referee) ; Baláš, Marek (advisor)
The main aim of this bachelor thesis is a proposal of a heat source for a specific house. The first part is a research of different heating technology. In the second part there is a shortlisting of heat sources for this specific house and then calculating of costs for the selected heating sources. These costs are calculated from heat losses of the object. After the economic comparison one source is selected, from which costs of heating are calculated with three versions of possible insulation of this house.
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Dry flue gas loss of fireplace stove reduction
Vodvárka, Petr ; Lachman, Jakub (referee) ; Baláš, Marek (advisor)
This bachelor thesis deals with the reduction of chimney heat loss of a fireplace stove with waste heat recovery. The results are the design of a functional heat exchanger and the calculation of the heat output. The heat exchanger must be designed for specific fireplace stove existing in a real living room and with realistic parameters. Technical documentation of the fireplace stove and a drawing of the heat exchanger are included in this thesis. Calculations of the reduction of chimney heat loss using the heat exchanger on a chimney are included in the conclusions. The advantages and disadvantages provided by using the heat exchanger are discussed.
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Grate RDF Boiler
Lachman, Jakub ; Šilhavý, Karel (referee) ; Lisý, Martin (advisor)
The master’s thesis deals with the design of a boiler for RDF combustion, based on the required power output and superheated steam parameters. The first part of the thesis focuses on combustion calculations. Boiler efficiency is also calculated in this chapter, using the heat balance efficiency method. The main part of the thesis consists of dimensional design and heat transfer calculations. The precision of the calculations is checked at the end of the thesis along with the chlorine corrosion, which is considered because of the higher amount of chlorine in the fuel. The thesis comes with a basic schematic of the designed boiler.
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