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Steam boiler for wood burning 40t/h
Mach, Ondřej ; Křemínský, pavel (referee) ; Skála, Zdeněk (advisor)
The purpose of this Diploma Thesis is the construction design of the steam-boiler for the combustion of biomass – wood pellets. For the specified parameters have been defined stoichiometric calculations and calculations enthalpy burnt gas. In sequence, there is designed and solved the configuraion of the steam-boiler, so that the result design and the number of the heat-delivery surfaces can be determined, in dependence on the required inlet parametres of the air and outlet parametresof the water vapour. These parametres mean the amount, the temparature and the pressure. The aim of the thesis is to make a design of the steam.boiler burning biomass according to the set parametres. This very ecological fuel can really substitute the fossil fuel and friendly respect the environment.
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Calculation prediction of characteristic parameters of combustion process
Táborský, Miroslav ; Kohoutek, Josef (referee) ; Jegla, Zdeněk (advisor)
The present thesis is focused on calculation prediction of characteristic parameters of combustion process in combustion chamber which is installed at burners testing laboratory. In the thesis basic theoretical knowledge needed for description of heat transfer in process combustion equipment are given. The Plug Flow Furnace Model is based on this knowledge. This model is used to evaluation of specific heat flux in tube furnaces. In the next step the Plug – Flow model is modified and adapted on the combustion chamber. Obtained results are compared with a measured data. By this comparison quality of this model is assessed.
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Steam boiler for biomass and sand 92,5t/h
Špiláček, Michal ; Lisý, Martin (referee) ; Skála, Zdeněk (advisor)
This master’s thesis is dealing with design of steam boiler for wood chips. Wood chips are considered as biomass and so the steam boiler is considerate to enviroment. Main purpose of this work is calculation of size and number of water/steam heating surfaces so the boiler can produce steam with required parametres of temperature, pressure and amount.
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Steam boiler burning wood 60t/h
Umýsa, Radovan ; Baláš, Marek (referee) ; Skála, Zdeněk (advisor)
This diploma thesis deals constructional and calculation design of the steam boiler 60t/h of clean burning wood. For the parameters of the stoichiometric calculations are carried out and enthalpy calculations of combustion and air. The collected data is then made It a diagram of air and flue gas. The following are the calculations with the heat balance calculations of losses and determination of the boiler thermal efficiency of the boiler. It is made of the combustion chamber design and its thermal calculation. After determining the main dimensions of the combustion chamber moves continue the calculation of boiler heating surfaces. At the end of the calculations are controlling the overall energy balance. Boiler output parameters as temperature, pressure and quantity of the steam.
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Steam boiler for demolition wood
Mazal, Lubomir ; Skála, Zdeněk (advisor)
The threat of depletion of fossil fuels is the driving force to diversify energy sources in the Czech Republic respectively in the European Union but also worldwide. One of these potential sources are being biomass boilers. The construction of these boilers has expanded in recent years because of government support for the construction of clean energy sources. Whether it is a burning of clean biomass or just incorporation of biomass to fossil fuels, teh substitution of fossil fuels and biomass boilers are the ideal solution. Their major advantages include significant reductions in emissions, mainly sulfur compounds, organic closure of the cycle of CO2 and disposal costs of spent residue.
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Steam boiler for fytomass
Lípa, Viktor ; Ing.Obrovský (referee) ; Skála, Zdeněk (advisor)
Viktor Lípa Stillage boiler Graduation theses, power department, 2008 This graduation theses deals with designer solution of the boiler, include the dimensioning heat exchangers and engineering designer of the economizer chamber. Boiler is used for stillage combustion and fitted by natural circulation in vaporizer and stoker fired furnace.
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Gas turbines
Bukáček, Miroslav ; Kracík, Petr (referee) ; Pospíšil, Jiří (advisor)
The aim of this Bachelor thesis is create a summary of gas turbines and their comparison with internal combustion piston engines. This thesis deals with work cycles of gas turbines, internal combustion piston engines and their effectiveness. It contains a description of the basic components necessary for the operation of gas turbines. In conclusion is comparing of gas turbines and internal combustion piston engine.
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Heat flux calculation during boiling process – application for cooling of combustion chamber
Földváry, István ; Pačíska, Tomáš (referee) ; Vondál, Jiří (advisor)
There is a water-cooled combustion chamber at the Institute of Process and Environmental Engineering, which is used for testing of burners. Effective cooling is a particularly significant problem. It is also necessary to ensure accurate measurement of wall heat flux extracted by the cooling water. Therefore the main aim of the thesis is calculation of the minimum flow rate of cooling media required for safe operation of the combustion chamber. A comprehensive review of the heat transfer mechanisms was performed. Description is provided for the basic characteristics of phase changes with an emphasis on detailed analysis of mechanisms of boiling and evaporation. The presence of boiling at the water-side wall in the inner mantle was verified in the calculation part. Computation of the heat transfer coefficient was done by using the similarity methods. Temperature of the wall was then evaluated. A control on the presence of nucleate boiling was performed and the required minimum flow rate was determined for each section of the chamber.
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Burner testing
Rychter, Aleš ; Hájek, Zdeněk (referee) ; Bělohradský, Petr (advisor)
Bachelor thesis deals with testing of burners used in industrial applications. Overall is work divided into two main parts in which the first one is focused on basic classification of burners according to mixing type, fuel type and air supply system. The Second part of work is then focused on the burner tests. It describes types of tests and test environments in which the combustion tests can be carried out. In terms of tests, it is then necessary to make some important decisions, including the choices of testing fuel, combustion chamber and oxidizer, which have impact on the result. The preparation of tests also includes the developing of test procedure in which it is necessary to include the requirements of specific tests. The tests have to be carried out according to the relevant technical standards. After the realization of every test the evaluation of measured data has to be done and the test report summarizing the results of the test has to be issued. Since during the tests a number of process variables is measured like emissions, temperatures, pressures, flow rates, etc., the necessary instrumentation is described as well.
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