National Repository of Grey Literature 15 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Emissions from biomass combustion
Vaněk, Michal ; Lisá, Hana (referee) ; Baláš, Marek (advisor)
The thesis deals with harmful substances originating as products of biomass combus-tion and possibilities of reducing their emissions from boilers for household heating. First of all, biomass is introduced and a description of important fuel properties in terms of its combustion is given. Secondly, the characteristic of the combustion process and origination mechanisms of individual substances are presented. This is followed by a description of the properties of these substances and their impacts on human health and the environment. The purpose of the next chapter is to present the reader with current legislation addressing the emissions of small boilers. Then a separate chapter describes possible methods that can be used to reduce emissions of these devices. Finally, several measures in the form of modifications and devices, capable of reducing harmful emissions of small boilers are given.
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.
Methods of Determination of Moisture Content
Bezdíček, Jiří ; Lachman, Jakub (referee) ; Lisá, Hana (advisor)
With the growing interest in the energy use of biomass in the form of solid biofuels, the requirements for determining the moisture content of these fuels are also growing. Moisture is an important factor not only in the production of biofuels, where the moisture values must be ideal, eg in the production of pellets, but also in storage and other processes. The aim of the work was to determine the suitability of methods for determining moisture for various types of solid biofuels. The main subject of interest was fuels with grain structure. A search of the basic distribution of fuels and introduced and new methods for determining moisture was performed. The research was focused on oven drying methods. The result is the determination of the unsuitability of the method of drying scales for fuels with grain structure, the suitability of all investigated methods for wood fuels, the accuracy of the reference method for most fuels and the susceptibility of the analytical method to the homogeneity of the test portion.
Agropellets for Combustion
Nejerál, Michal ; Lisá, Hana (referee) ; Lisý, Martin (advisor)
Agropellets are one of the alternative fuels which have been used very often nowadays. Therefore, this thesis deals with the use of agropellets as a fuel. It‘s focused on the generation of emissions during combustion. There are described properties of pollutants released during combustion and properties of agropellets. In a sample of selected fuels, the proportion of chemical composition of elements in the combustible and the calculation of their calorific value are experi-mentally determined. Furthermore, we found out the basic elemental composition of the flue gas, which was measured during combustion on the pilot unit.
Fuel properties: Determination of moisture solid fuels
Tretera, Michal ; Vavříková, Petra (referee) ; Lisá, Hana (advisor)
This bachelor's thesis deals with the determination of moisture content in solid fuels. First part contains classification of solid fuels, proximate analysis of solid biofuels and a research of methods for determination of moisture content in solid biofuels. Description of impacts of the moisture content on fuel is included in the proximate analysis. Second part of the thesis is experimental. Thirteen solid biofuels and one solid recovered fuel were measured to obtain their moisture content. The methods used to determine the moisture content include four different drying methods and a xylene distillation method. For each method there are details of the procedure and a summary of the results.
The potential of biogas in the Czech Republic and opportunities for increasing efficiency of biogas stations
Dvořák, Lukáš ; Lisá, Hana (referee) ; Milčák, Pavel (advisor)
The bachelor’s thesis deals with mapping of potential a biogas in the Czech Republic and compareses biogas purification technologies. The balance calculations are performed in this thesis which determine the current situation biogas production in the Czech Republic in 2017. There are recommendation for increasing efficiency of biogas stations.
Analysis of the heat utilisation from biogas stations for heating
Kareš, Martin ; Lisá, Hana (referee) ; Milčák, Pavel (advisor)
This bachelor thesis deals with the analysis of the use of heat from biogas stations. The first part describes the production of biogas, its combustion efficiency and the development of energy production thus obtained. In the second part it deals with individual solutions of the application of heat produced and in the last chapter it analyses the balance of the specific solution of heat transfer and its impact on the environment.
Emissions from biomass combustion
Ptáček, Pavel ; Lisá, Hana (referee) ; Baláš, Marek (advisor)
Bachelor thesis deals with production of gaseous emissions from biomass combustion. It describes how emissions arise and how they affect human health and environment. In experimental part of the thesis emissions were measured and compared for different types of fuel in two combustion devices. Emission classes of combustion devices were also determined.
Emissions of solid pollutants
Strnad, Ondřej ; Lisá, Hana (referee) ; Baláš, Marek (advisor)
The thesis deals with issue and properties of solid particles of anthropogenic origin. It describes the principles and technologies for removing them from the flue gas flow and avoid-ing leakage into the atmosphere. It focuses on types of separators, especially mechanical sepa-rators. The work includes an experimental part involving obtaining data characterizing the cyclone separator.
Production of Unmeasured Emissions by Combustion in House Boilers
Chlubna, Martin ; Lisá, Hana (referee) ; Lisý, Martin (advisor)
This bachelor thesis deals with the production of non-monitored pollutants during combustion in domestic boilers. The theoretical part is made up of a research study dealing with pollutants and their legislation. In the experimental part combustion tests for coal and wood of different moisture are made. In conclusion, the measurement results are evaluated on the basis of chemical analysis.

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