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Analysis of factors influencing gas microturbine operation
Kostrhounová, Petra ; Máša, Vítězslav (referee) ; Konečná, Eva (advisor)
This bachelor thesis deals with the assessment of operating parameters of a gas microturbine. The first part covers the gas microturbine, its function and individual structural components. It also describes the possible use in combined heat and power generation and an overview of main manufacturers in the current market. The theoretical part of the work, based on a search of professional studies, summarizes selected factors influencing the efficiency of the gas microturbine, namely temperature and relative humidity, atmospheric pressure and parameters of various types of fuel. In the last part, the work focuses on the specific operation of the gas microturbine Capstone C30. Data from experimental measurements are analysed and the electrical efficiency is determined from them, which is compared with theoretical assumptions. Finally, the influence of the measured parameters on the electrical efficiency of the microturbine is discussed and the ideal course of the experiment is proposed.
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Optimization of the cleaning of the heating surfaces on the coal boiler K1 in Plzeňská teplárenská
Kostrhounová, Petra ; Tomáš, Zdeněk (referee) ; Baláš, Marek (advisor)
This master’s thesis deals with the assessment of cleaning of heat transfer surfaces of a coal-fired steam boiler. The first part is devoted to the description of the knowledge about the formation of deposits, the deposits influence on the operation of the plant and cleaning mechanisms. Then, basic information on the operation, design and method of removal of deposits of the K1 boiler is summarised. Based on this knowledge, operating data from four summer months of boiler operation are analysed to determine the fouling condition of the boiler surfaces and over fifty graphs are produced showing the evolution of selected operating values between each cleaning cycle of the convective and plate superheater as well as air preheater. Subsequently, a parametric model of the K1 boiler at 60 % output is created in PPSD, which allows a more detailed analysis of the boiler operating characteristics and is used for a more thorough interpretation of the operating data. In addition, two models for higher boiler outputs and three theoretical models of operating conditions with different levels of surface fouling were developed. To verify the accuracy of the developed model, a calculation of heat transfer through the outlet superheater is performed. Finally, the calculation of steam consumption for sootblowing is performed.
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Optimization of the cleaning of the heating surfaces on the coal boiler K1 in Plzeňská teplárenská
Kostrhounová, Petra ; Tomáš, Zdeněk (referee) ; Baláš, Marek (advisor)
This master’s thesis deals with the assessment of cleaning of heat transfer surfaces of a coal-fired steam boiler. The first part is devoted to the description of the knowledge about the formation of deposits, the deposits influence on the operation of the plant and cleaning mechanisms. Then, basic information on the operation, design and method of removal of deposits of the K1 boiler is summarised. Based on this knowledge, operating data from four summer months of boiler operation are analysed to determine the fouling condition of the boiler surfaces and over fifty graphs are produced showing the evolution of selected operating values between each cleaning cycle of the convective and plate superheater as well as air preheater. Subsequently, a parametric model of the K1 boiler at 60 % output is created in PPSD, which allows a more detailed analysis of the boiler operating characteristics and is used for a more thorough interpretation of the operating data. In addition, two models for higher boiler outputs and three theoretical models of operating conditions with different levels of surface fouling were developed. To verify the accuracy of the developed model, a calculation of heat transfer through the outlet superheater is performed. Finally, the calculation of steam consumption for sootblowing is performed.
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Analysis of factors influencing gas microturbine operation
Kostrhounová, Petra ; Máša, Vítězslav (referee) ; Konečná, Eva (advisor)
This bachelor thesis deals with the assessment of operating parameters of a gas microturbine. The first part covers the gas microturbine, its function and individual structural components. It also describes the possible use in combined heat and power generation and an overview of main manufacturers in the current market. The theoretical part of the work, based on a search of professional studies, summarizes selected factors influencing the efficiency of the gas microturbine, namely temperature and relative humidity, atmospheric pressure and parameters of various types of fuel. In the last part, the work focuses on the specific operation of the gas microturbine Capstone C30. Data from experimental measurements are analysed and the electrical efficiency is determined from them, which is compared with theoretical assumptions. Finally, the influence of the measured parameters on the electrical efficiency of the microturbine is discussed and the ideal course of the experiment is proposed.
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An Influence of Foreigners on the Labour Market in South Bohemia Region and Neighbouring Regions
KOSTRHOUNOVÁ, Petra
This article treats with foreigners on the labour market in South Bohemia and South Moravia regions. In the opening part there are described the general principals of labour market functioning and the legislative conditions of foreigners{\crq} use on the Czech labour market. Also the encouragement of employing foreigners and their integration in the Czech Republic is mentioned. The practical part of this article is focused on analysis of the situation of the foreigners on the labour market in the regions in view. First of all, each region is shortly described and afterwards the situation of the foreigners living in the region is described. In the next chapter there are the results of analysis presented and the whole article briefly summarized. In the end the impacts of the current economic crisis on future trends in the amount of the foreigners in the Czech Republic are mentioned as well.
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