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Concentrator photovoltaic systems
Straškraba, Vojtěch ; Solčanský, Marek (referee) ; Vaněk, Jiří (advisor)
The subject of this bachelor´s thesis is to introduce concentrator photovoltaic systems, history of their foundation, evolution and application, principles of function and description of technology including its construction, optics, special photovoltaic cells and their cooling. The practical part of thesis describes the experimental concentrator photovoltaic system build in cooperation with Solartec s.r.o. company. The system is used to test hypotheses and study the behavior during its operation. The aim is to measure concentration ratio, temperature and electrical characteristics and to compare advantages of active and passive cooling of photovoltaic cells.
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Indoor flexible wireless CO2 measure system
Válek, Vít ; Fiedler, Petr (referee) ; Arm, Jakub (advisor)
Monitoring of the carbon dioxide concentration in the building is carried out for several reasons. One is to ensure hygiene conditions. With the advent of Bluetooth 5.0 came the support of mesh network technology, which is defined by the Bluetooth Mesh standard. By implementing this standard, we can create an extensive network of devices monitoring the concentration of carbon dioxide in the building. Based on the monitored concentration, we can control the air conditioning and ventilation of the spaces, ensuring that the hygiene conditions are met. Thanks to the compatibility of Bluetooth Mesh with Bluetooth Low Energy, it is possible to access individual nodes, e.g. from a mobile phone. The aim of this work is to design and implement a measuring system whose elements will communicate with each other using Bluetooth Mesh wireless technology.
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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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Analysis of the legitimacy of use of solar trackers for photovoltaic systems in a given area
Hořava, Pavel ; Radil, Lukáš (referee) ; Ptáček, Michal (advisor)
This bachelor’s thesis deals with the Analysis of justifiability of use of solar trackers for photovoltaic systems in given locality. The principle of the photovoltaic transformation, kinds of photovoltaic panels, legislation and a suitability of the Czech republic for photovoltaic systems are roughly characterized in the first part. The second part is about the systems of tracking the photovoltaic panel to the sun and the stationary placement photovoltaic panel. The possibilities of increasing of power of photovoltaic panel and the factors, which influent the power of photovoltaic panel, are detailly described in the third part. The photovoltaic system in given lokality is designed in the fourth part. The experiments are designed, realised and evaluated in the next parts. The experiments are focused on practical verification of the power of stationary placed panel during the day and the year. The last part of this bachelor’s thesis deals with the evaluation of justifiability of use of solar trackers for photovoltaic systems in given locality from many points of view.
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Photovoltaic cell for concentrator system
Straškraba, Vojtěch ; Solčanský, Marek (referee) ; Vaněk, Jiří (advisor)
The subject of this master’s thesis is to introduce concentrator photovoltaic systems. Main subject of presented work are photovoltaic cells and their features and characteristics. The work deals with physical fundamentals of solar cells, type of cells and their specifics and discusses possible treatment for achieving better characteristics of concentrator systems. In the practical part is realized measurement and analysis of electrical characteristics of 9 different monocrystalline silicon cells. From those is the most efficient cell chosen for further use as reference cell.
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DLMS concentrator simulator
Buš, Ondřej ; Šilhavý, Pavel (referee) ; Lieskovan, Tomáš (advisor)
This work is focused on a field of smart metering and data concentrators. The first part of this paper describes the DLMS/COSEM specification. The first section contains DLMS protocol specification, the process of communication between devices and services that allows data communication. COSEM classes and objects can be found in the second section. These objects are used to access a specific data stored inside smart meters. Lastly, there is an section that is focused on OBIS objects which are used for addressing. In the second part, the concentrator's basic functionalities are described. These functionalities include device management and configuration file storage. The last part then focuses on a web server. The web server allows a user to manage the concentrator by adding, editing and removing connected smart meters.
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PLC for Smart Metering
Houser, Milan ; Rusz, Martin (referee) ; Mlýnek, Petr (advisor)
This bachelor’s thesis deals with the technology communicating over the electrical power grid, PowerLine Communication (PLC). It solves the principles, possibilities of use, ad-vantages and disadvantages of this technology. The basic issues of communication of PLC networks, Smart Grid and Smart Metering on narrowband PLCs with multiple carriers on the PRIME and G3 standard are discussed. At the end of the work there are measurements on Atmel and Devolo devices. A laboratory task was also created here, which deals with the measurement of narrowband transmission.
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Switch optimization in converged network
Švec, Adam ; Sobek, Jiří (referee) ; Škorpil, Vladislav (advisor)
Switch Optimization in a Converged Network thesis discusses the role of the Ethernet switch in the network. It describes differences between the switch and the hub in the network and the impacts on the collision domain size. In the converged network, priority data switching according to their origin and thus the qualitative point of view is also addressed - e-mails, voice services and multimedia will each behave differently. A real element, switch L3 - a switch with services quality support - is mentioned. The tool Matlab - Simulink is briefly described and a functional simplified model of the ethernet switch was created. Furthermore, the topic was used as a theme for a laboratory task in the subject Services of Telecommunication Networks. A model for Simulink and an example of the laboratory protocol for the created task are attached to the thesis.
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Stress concentrators in aircraft structures
Černota, Jiří ; Pejchar, Jan (referee) ; Augustin, Petr (advisor)
This bachelor´s thesis deals with significant stress concentrators in compossed plane constructions made of metal materials. It generates summary of the most significant notches and their effect on fatigue life. It further states opportunities of description of constructional solution leading to reduction of stress concentration.
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PLC for Smart Metering
Houser, Milan ; Rusz, Martin (referee) ; Mlýnek, Petr (advisor)
This bachelor’s thesis deals with the technology communicating over the electrical power grid, PowerLine Communication (PLC). It solves the principles, possibilities of use, ad-vantages and disadvantages of this technology. The basic issues of communication of PLC networks, Smart Grid and Smart Metering on narrowband PLCs with multiple carriers on the PRIME and G3 standard are discussed. At the end of the work there are measurements on Atmel and Devolo devices. A laboratory task was also created here, which deals with the measurement of narrowband transmission.
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