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Economics and viability of photovoltaic power station
Mrázek, Dalibor ; Bača, Petr (referee) ; Křivík, Petr (advisor)
At the beginning of the submitted work, I dealt with the study of various types of photovoltaic panels, their diverse use, effectiveness, advantages of each type and description of climate in the Czech Republic. Depending on the number of sunny days and no claudy days, I was looking for the best areas photovoltaic power. On the basis of cooperation with the firm and Energ-servis and using their test center, I compare different types of panels, their performance in relation with the cost and method of purchase. From these data, six diverse installation, I tried to determine the best type of panel that is best for the South Moravian region in the cost / return on investment.
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Optimalization of solar park operation
Kašpařík, Petr ; Vaněk, Jiří (referee) ; Dolenský, Jan (advisor)
This work deals with the comparison of photovoltaic technologies and optimization of Photovoltaic power plants using empirical models. The primary purpose of this work is to analyse current status of selected photovoltaic power plants in the Czech republic and to suggest possible means to increase their productivity. This analysis uses data measured by systems for direct management of these parks, and these data are compared with theoretical data calculated from measurement system Czech weather stations and PVGIS.
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Integration of Photovoltaic Power Plants in the Electricity System
Michl, Pavel ; Paar, Martin (referee) ; Mastný, Petr (advisor)
The thesis discuses an integration of photovoltaic power stations to electric network. The first part describes connecting conditions of small sources to distribution system, including administrative requirements, feasibility study, and requirements to the energy meters, measuring, control devices, switching devices and protection. The second part is aimed to describe problems of the photovoltaic system. Solar radiation generating and reducing of its intensity incident upon the earth surface are described in this part. The quantum of produced electric power depends on climatic conditions in the fixed area, seasons, etc. This work also discusses the types of photovoltaic cells and their actual efficiency. Inverters are further important components of the photovoltaic system. The parameters of the inverters have a great influence on the total actual efficiency of the photovoltaic system. Different methods of the photovoltaic panels’ connection with the inverters and their advantages and disadvantages are also mentioned. The supporting structure of the photovoltaic panels and eventually transformer are further important components of photovoltaic system. The work also analyze the methods of connection of the photovoltaic power station to distributive low voltage and medium voltage network, electric energy accumulation and possibilities of the sale of produced electric energy. The large number of the connected photovoltaic power stations has negative influences to electric network. The third part contains the design of a photovoltaic power plant with a capacity of 516,24 kWp on the scoped area in southern Bohemia. The project documentation for the location where the power plant is designed is also made. It contains the design of photovoltaic panels, the design of the inverters to get an optimal power load. This part also contains a calculation of the photovoltaic system losses and the design of transformer and the cable junction calculation of the distributive system. The feasibility study of the power plant connected to distributive system is also conducted. Its delivery rate will be connected to the distribution point Řípov (110/22 kV). The calculation results show us that this photovoltaic power plant can be linked to the distribution system. The final part of this paper contains an economic estimate of the photovoltaic power plant operating and the calculation of the return. An Economic return is influenced by the wide range of values that affect the total return rate. The calculation of an operating economy is made for several variants. The return rate in refer to contemporary redemption price for 2010 with no consideration for a bank loan is 7 years. If we consider the bank loan it would be 12 years. The penetrative reduction of the redemption price is expected for 2011. Calculation works with the decline of 30 %. It would extend the rate of return to 11 years without a bank loan or to 22 years with the bank loan. The bank loan is considered to cover 80 % of the investment.
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Project of the photovoltaic system
Ševčíková, Kateřina ; Půčková, Helena (referee) ; Kotlík, Josef (advisor)
The diploma thesis deals with elaboration of project solar thermal and photovoltaic solar systems for all-season service. The theoretical part focuses on the general description of the solar thermal and photovoltaic systems, legislation of renewable sources in the Czech Republic and the status of photovoltaics in the Czech Republic. The experimental part deals with the design of measures for energy saving by using solar energy systems. These measures are proposed for construction of houses in Podolí u Brna, especially on extra-family house. The aim of the work is to make a proportioning, choosing the right parts and calculating the economic and ecologic balance. Finally, thesis gives recommendations for further action in saving energy in houses in Podolí u Brna.
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Small photovoltaic system
Just, Jan ; Chroboczek, Libor (referee) ; Pospíšil, Jiří (advisor)
This thesis describes the fotovoltaics at the present time. Introduction includes information regarding to resources of solar energy, main principle of transformation solar energy to electrical and history. Next parts summarise types of solar cells in economical term, types of material and description of their properties. Thesis includes the construction of fotovoltaic panel and its configuration to fotovoltaic systems with or without connection to electrical power network, contains convenient technologies for improving efficiency and the czech legislation. Final part focuses on designing grid-on system for real object including komplex study of object location, used components and calculation of whole produced electric energy and pay-back time. The main aims are presented in conclusion as well as advantages and disadvantages of the investment.
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Photovoltaic, as an alternative source of electricity
Floková, Kateřina ; Baláš, Marek (referee) ; Pospíšil, Jiří (advisor)
The aim of this work is to provide a description and an explanation of the process of obtaining elektrical energy from solar radiation. There is preliminary mentioned an importance of producing electrical energy from renewable sources and development of photovoltaic systems. The body of the thesis is divided into seven chapters. At first, there is described the principle of transformation solar radiation into electrical energy. Then, the description of types of barrier-layer photocells follows. The types are divided according to their structure and material, which are they produced from. The third chapture is focused on production and construction of photovoltaic modules. Ways, how can be production of electricity increased, are mentioned in the fourth chapture. Advantages and disadvantages of solar concentrators are given there. In the fifth chapture there are described two basic kinds of connection of photovoltaic system. Different ways of taking-off produced electricity are related with those kinds of connection. The last chapture is the fundamental chapture of the thesis. There is given a project of concrete photovoltaic system. For this system is calculated economic return of investment included supposed increase of prices of electricity. In conlusion the author noticed events that would be given and emphasized the outcome of concerete project of photovoltaic system.
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Fotovoltaic systems for residential houses
Chadim, Jakub ; Jaroš, Michal (referee) ; Hejčík, Jiří (advisor)
Bachelor´s thesis describes dilemma usage of solar energy by photovoltaic. It explains fundamental terms pair with conversion solar radiation on electric current. Further it presents review today exploited photovoltaic‘s systems and focuses on using this technology in residential houses along with modelling proposal photovoltaic’s system in technical, legislative and economics site project.
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Comparison of the effectivity and the ecological benefits of photovoltaic power stations in different areas of the Czech Republic
SLUKA, Petr
The study is focusing on comparison of efficiency and ecological impacts of photovoltaic power stations depending on their locations in the Czech Republic. The report gives us an overview of photovoltaic power stations efficiency and also their environmental value by minimising CO2 emissions due to replacing conventional energy technologies. The research is based on data taken from energy audits of photovoltaic power stations in Vidov (South Bohemia), in Hodonice (South Moravia) and Lahošť (North Bohemia). The measured data of efficiency and CO2 savings are compared to forecast data from numerical weather prediction models PVSYST, PVGIS and Meteonorm. The project revealed, that photovoltaic power stations efficiency directly depends on their geographic location. Decisive factor was sunlight. Paired comparison showed, that there is a difference between photovoltaic power stations in Lahošť, Hodonice (P < 0,01) and Vidov (P < 0,05). The difference between real and expected datas from each photovoltaic systems was conclusive (p < 0,01). Significant was also factor of month (p < 0,001).
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Nursery school financing - case study Prague 10
Mirtesová, Andrea ; Urbánek, Václav (advisor) ; Kubík, Rudolf (referee)
My Bachelor thesis analyses nursery school financing within the Czech Republic, with emphasis placed on a specific kindergarten located within the Prague 10 district. The aim of my Bachelor thesis is to give an in-depth explanation of the ways in which a concrete nursery school is financed and to draw up a proposal that would make better, more efficient, use of it's finances.
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