
Hydrogen for Power
Kocman, Lukáš ; Pospíšil, Jiří (referee) ; Skála, Zdeněk (advisor)
The increasing use of hydrogen in modern energy, has become the motive for writing this work. The work is focused on hydrogen energy and its aim was to compile an overview of hydrogen production technologies, the use of hydrogen technologies in current energetics and the use of hydrogen to energy accumulation. In addition to describing current hydrogen technologies, this work also includes examples of hydrogen devices and projects that we may encounter today. An overview of the abovementioned technologies has shown that, despite some of its shortcomings, hydrogen has a significant application in current energetics, that is expected to increase in the coming years.


Changing the fuel base of the coal boiler
Přikryl, Josef ; Nechvátal, Ondřej (referee) ; Skála, Zdeněk (advisor)
The diploma thesis contains calculations of gasification of coal boiler. The first part of thesis contains stochiometric calculations, heat balance and calculations of combustion chamber. In the next part are calculations of heat exchange surfaces and at the end of this part are calculations of regenerative air heater and total boiler balance. Calculations are made by regard to investments costs, preservation of the steam parameters and keeps emissons limits.


Model of district heating network
Kolenčíková, Jana ; Skála, Zdeněk (referee) ; Pospíšil, Jiří (advisor)
Subject of this thesis is district heating and heating network model design. Firstly, it describes basic principles of heat supply and its elements. Secondly, computational model of heating network is created based on grid map of the network. The model contains proposed pipeline system and calculation of heat and pressure losses. Lastly, price map for heat consumption points, in dependence on heat losses, is presented.


Gas Boiler  220 t/h
Flodr, Jan ; Ryšavý, Milan (referee) ; Skála, Zdeněk (advisor)
For set parameters of a steam and a boiler feed water is designed a thermal and dimensional plan of the boiler, allowing high efficient requests. A boiler is used for combustion of blast furnace gas contains 10% of a natural gas used as a stabilisation element.


Design of steam gas boiler
Kuriál, Jakub ; Bursa, Robert (referee) ; Skála, Zdeněk (advisor)
This thesis deals with a design of a steam boiler combusting natural gas. It consists of stoichiometric calculation, determination of boiler efficiency, thermal calculations and determining geometric parameters of the boiler and its heat transfer surfaces. The results are verified by the heat balance of the boiler.


Design of the heat source of the local district heating system
Svobodová, Veronika ; Skála, Zdeněk (referee) ; Pospíšil, Jiří (advisor)
The diploma thesis is focused on district heat supply, heat sources, machinery and safety equipment of boiler rooms. The main goal of the thesis is to modernize parts of the heat sources with the respective boiler room equipment in accordance with the latest available technology. The generated thermal energy is used for heating or hot water production for residential and nonresidential buildings in the vicinity of the boiler room. In the theoretical part, the thesis focuses in more detail on boiler rooms, specifically on heat energy sources, machinery and safety equipment of boiler rooms, system ventilation and combustion exhaust. The findings are applied in the design of the new boiler room layout. It is followed by a detailed description of the current state of the boiler room and heat networks. An essential part of the work is the assessment of layout of the current heat sources and the creation of a new design for the replacement of insufficient sources and related equipment. The last goal is an economic overview of the designed project solution.


Steam Boiler
Skoupý, Jan ; Kól, Přemysl (referee) ; Skála, Zdeněk (advisor)
This thesis is focused on the design of steam boiler like a supplement for cogeneration unit of biogas plant. The main idea is to use a waste heat from the exhaust gasses to produce a technological steam of required parameters. The thesis contains of a calculation an amount of the heat in exhaust gasses and a heat exchange surface. An Aerodynamic loss and a wall thickness of the boilers are verified by strength calculation in the next parts of this thesis. At the end of this thesis are made projection drawings and diagram, which are made of the calculations.


The Effective and Ecological Burning of Biomass
Špiláček, Michal ; Kolat, Pavel (referee) ; Masaryk, Michal (referee) ; Skála, Zdeněk (advisor)
This work deals with the creation of a numerical model of a biomass combusting chamber on a grate. The research part of this work describes the basic properties of biomass important for its combustion and the biomass combustion process itself. For this process which it is necessary to know the dynamics of the chemical reactions and the overall mechanism of a grate combustion of fuels. It also describes the production of harmful emissions that can be generated by combustion of biomass and the emphasis is mainly on the production of nitrogen oxides. In the next part is described the combustion device itself and the basic mathematical model which incorporates the mechanisms of heat transfer, flow of fluids and transport of chemical species. The basic mathematical model is then extended to a complete mathematical model by determining the initial and boundary conditions. Subsequently, the results of the computer simulation of the mathematical model are presented and commented. The main focus are the emissions of nitrogen oxides and hydrocarbons. These results are used to design an improvement of the geometry of the combustion chamber.


Calculation of pressure losses of flue gas ducts using mathematical modeling
Suchý, Václav ; Skála, Zdeněk (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the calculation of pressure losses in the flue gas ducts. First part of this work describes properties of flue gas and flow dynamics. Part of the theoretical analysis was detailed study of pipeline elements with emphasis on the reasons for the existence of pressure loss in the flow, calculations of the resistance coefficients and possible methods of reducing the losses. In the practical part, a model of the pressure loss calculation of the existing flue gas line installed in the incineration plant was created. At the end of the thesis a proposal for optimization of this route was made with emphasis on the reduction of the overall pressure loss. By optimization the pressure drop of the specified route was reduced from 3581 Pa to 2647 Pa, i.e by 26% and the required power input of the fan was reduced from 225 kW to 166,5 kW.

 