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The workings of Autonomous Greenhouses
Formánek, Adam ; Kudela, Libor (referee) ; Elbl, Patrik (advisor)
This research work aims to concentrate information from extensive literature dealing with autonomous greenhouse related topics. The first part of the work is focused on basic concepts related to autonomous greenhouses. The second part explains an amount of concepts defining the logical apparatus and logical principles used in autonomous greenhouse design. Furthermore, this work deals with the physical aparatus of intelligent greenhouses, primarily its actuators. Finally it deals with autonomous greenhouse competitions, with focus on their conditions and logic.
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Design of heat exchanger
Kopřivová, Anna ; Kudela, Libor (referee) ; Milčák, Pavel (advisor)
This bachelor thesis discusses a design of the water-steam type heat exchanger. The nature of heat exchangers is based on increasing the efficiency of thermal circuits. At the beginning of the thesis, a principle of these thermal cycles, namely Carnot’s and Rankine-Clausius’s cycles are described. Furthermore, in this thesis, I deal with heat exchangers alone together with their basic distinction and more detailed description with a closer look at specific sorting of the heat exchangers regarding their construction, which means recuperative, regenerative and direct contact exchangers. Special attention is paid to tubular exchangers, which create the core of thermal computation. Closing part involves a design of a low-pressure tubular heater by means of assigned parameters of work substances at the input and the output.
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Circuits of nuclear power plants
Pavlíček, Martin ; Kudela, Libor (referee) ; Milčák, Pavel (advisor)
This bachelor's thesis deals with the history and beginnings of nuclear energy, an explanation of the basic knowledge of nuclear energy and an introduction to the issue. Then, the division of nuclear reactors according to various criteria is described. Furthermore, the solution of individual circuits in a nuclear power plant is described according to the type of reactor used. The individual circuits are described at the Temelin nuclear power plant. The last part deals with nuclear safety and various safety systems, without which a nuclear power plant could not be started.
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Assessment reduced heat loss of an apartment house
Šimková, Nikola ; Kudela, Libor (referee) ; Baláš, Marek (advisor)
The rising trend in energy prices has led to the search for options to reduce its need. The bachelor thesis deals with the assessment of the heat loss reduction for an apartment building. In the introduction, it deals with factors affecting the energy consumption for heating. It reviews the heat loss of a building and possibilities to minimalize it, which leads to an energy performance reduction. Subsequently, it deals with the calculation procedure of the design heat loss for the model apartment building before and after the implementation of measures to reduce heat losses. In the end these two states are compared and evaluated with each other The result is an assessment of the reconstruction benefits.
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Heating the house by heat pump
Pinkas, Jan ; Kudela, Libor (referee) ; Pospíšil, Jiří (advisor)
The point of this bachelor thesis is a family house heating with a use of a heat pump. In the first part of the thesis the principle and working of a heat pump are explained. Also the basic sources of energy for the heat pump including their pros and negatives are talked over. Secondly in the practical part thermal losses and energy consumption of the chosen house are calculated. Based on those calculations the heat pump and the heating system are chosen. In the end the investment is evaluated.
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Reducing the energy demand of a family house
Ondrák, Adam ; Kudela, Libor (referee) ; Pospíšil, Jiří (advisor)
The thesis deals with the issue of reducing the energy intensity of a family house and it approaches this issue in three steps. Firstly, the examination of the heat loss of the whole building, using the standard ČSN EN 12 831 and thermal vision. Subsequently, this is followed by the choice of the most economically suitable solution, so that the most modern technologies for reducing heat losses can be utilized and the project repays as quickly as possible. Furthermore, we will find the most suitable variant of a photovoltaic power plant, with regard to different types of photovoltaic panels. In conclusion, the price of the entire project and its repay and then other measures, that could be used to reduce project costs or the acquisition of additional equipment to reduce energy consumption, are listed.
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A test setup for thermal cycling of thermoelectric modules
Preisler, Lukáš ; Kudela, Libor (referee) ; Brázdil, Marian (advisor)
The present work is focused on thermoelectric modules and testing modes. Failures of thermoelectric modules occur due to the cyclic thermal stress in real applications and their power parameters decrease. Hence an experimental study of thermoelectric modules was executed, which measured parameters of thermoelectric modules and thermal cycling testing methods. In the practical part of this document, the thermal cycling conditions of thermoelectric modules were set-based on the previously stated study. A bipolar-pulse load in range +3,0 V and 3,0 V was proposed alternating after 90 seconds. For comparison of the modules among producers 200 cycles will be made. According to the cycling conditions, construction adjustments of current laboratory testing platform are proposed. The current platform is currently set to measure parameters of thermoelectric modules and is not for cycling load testing.
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Boilers for solid fuel
Zezulka, Patrik ; Kudela, Libor (referee) ; Baláš, Marek (advisor)
This bachelor thesis deals with the heating of houses with boilers for solid fuels. Thesis is divided into several parts. In the first part is dealt with most common solid fuels, their characteristics, composition and modifications for house heating. The second part is focused on solid fuel boilers, describes chosen boilers, their operation, their advantages and disadvantages. In the last part is economically assessed the suitability of selected solid fuel boilers for heating the model house.
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„Smart cities“ and decentralized production of energy
Opátová, Alexandra ; Kudela, Libor (referee) ; Špiláček, Michal (advisor)
This bachelor thesis describes the principles of decentralized energy sources, together with the advantages or challenges that concern the problem. The first chapter describes the concept of "smart city" and the field of use. There are also described options for modeling of urban areas as a unit. The second chapter focuses on the concept of decentralized power generation and the benefits that such a system can offer. The following chapters deal with cogeneration units and electricity storage options. The last chapter focuses on a issue of integrating decentralized power generation into the grid and compares various mathematical models and possibilities of regulation.
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