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Simulational model of utilization of process heat in the system with advanced small modular reactors
Doležal, Václav ; SÚJB, Jan Varmuža, (referee) ; Katovský, Karel (advisor)
This thesis explores the history and current utilization of heat from nuclear power plants, particularly small modular reactors (SMRs). The work initially analyzes the historical development and surveys past projects in this area. Furthermore, it provides an overview of possible applications of heat from nuclear power plants. Subsequently, the thesis focuses on advanced projects of small modular reactors with an emphasis on the industrial use of heat. In the practical part, a system model is constructed that integrates process heat from SMRs in systems of selected potential consumers with the possibility of concurrent hydrogen production.
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Thermoelectric generator for flue-gas duct of boiler to convert low-temperature waste heat to electricity
Třináctý, Jiří ; Baláš, Marek (referee) ; Brázdil, Marian (advisor)
With the dwindling supply of fossil fuels is increasing interest in the most efficient use of primary energy sources. In many of today's devices leaving a considerable part of the fuel energy wasted in the form of waste heat. As a partial solution suitable to demonstrate the application of thermoelectric generator, or devices that convert heat energy directly into electrical energy. The trend in recent years shows the growing interest in this technology and the development of new thermoelectric materials. In addition to the use of waste heat thermoelectric generators can be found in a number of other applications, primarily as a source of electricity in conditions where required minimal maintenance, reliability, reliability and durability. Text is divided into three parts: a theoretical part, the part dealing with the design and implementation of the generator, and a final evaluation. The theoretical part includes a description of the basic thermoelectric phenomena, thermoelectric materials and their properties, a description of the main components of thermoelectric generators and applications in which the thermoelectric conversion uses. Part of the design and implementation deals with the design of thermoelectric generator for chimney flue and comparison of the proposal with real measured values.
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Utilization of waste heat from rectification
Frank, Vojtěch ; Konečná, Eva (referee) ; Touš, Michal (advisor)
The purpose of the thesis is to draw up a model of the energy and material balance using technical and technological analysis of the current state of production of waste heat in the process of distillation. Using these results, subsequently evaluate the energy potential of individual streams and propose optimal energy savings using waste heat. Emphasis is placed on the modelling of the process and the various proposed savings options. The result is also an evaluation of the potential of the proposed savings based on the results of the calculation.
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Use of residual heat
Vlasák, Vojtěch ; Formánek, Marian (referee) ; Počinková, Marcela (advisor)
This dissertation is divided into three parts. The first part deals with the use of waste heat in the theoretical plane, where methods and possibilities of using this heat are described. Part Two, which is computational, deals with the suggestion of heating industrial halls with an adjacent, mostly office, building in two variants, then it goes on to also deal with the concept of equal pressure forced ventilation, a proposal of air curtains and preparation of hot water, where the heat source is a boiler. In the last part an experiment took place which investigated the conversion efficiency of thermal to electric energy.
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Increasing of electricity production in BGS using ORC cycle
Beck, Michal ; Baláš, Marek (referee) ; Lisý, Martin (advisor)
Objective of this Master’s thesis is to make search about generation and use biogas, with focus on cogeneration and to make search about possibilities of increasing the share of production of electricity by cogeneration from biogas. This final work has also the task to summarize possibilities of increasing the share with ORC cycle and to evaluate pros and cons of this use. Main part of this work is dealing with own design of increasing production of electricity with cogeneration from biogas in biogas station with ORC cycle and comparing this modification with steam engine.
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Integration of a technology for digestate thickening in a biogas plant
Miklas, Václav ; Touš, Michal (referee) ; Vondra, Marek (advisor)
This diploma thesis is mainly focused on the digestate thickening in a biogas plant. First, overview of the biogas technology in the Czech Republic is presented. Furthermore, problems with waste heat utilization and processing of fermentation residues (digestate) are described in more detail. Based on the research, multi-stage flash (MSF) evaporation was chosen as the technology for the digestate thickening. The main part deals with the integration of the chosen technology into a biogas plant process. The programming language Python was used to simplify the given task. In the preliminary stage, a complex mathematical model of a biogas plant was created, focusing particularly on the mass and energy balances. Subsequently, a computational model of the MSF evaporator was programmed. A procedure for the integration was suggested using the sensitivity analyses. Additionally, the model of a biogas plant was extended with the MSF evaporator. The key outcome of the thesis is a technical-economic analysis in which the impact of digestate transport price and electricity feed-in tariff on payback period is investigated. The results suggest profitability of MSF evaporator for biogas plants without subsidized feed-in tariff. Contrastingly, installation of MSF evaporator in older biogas plants with subsidized feed-in tariff can be economically viable only in cases of significantly longer transport distances.
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Waste heat to power technology
Kůra, Tomáš ; Máša, Vítězslav (referee) ; Konečná, Eva (advisor)
This bachelor thesis focuses on the methods of waste heat conversion to electrical energy. There are presented and described so far known methods that generate power via mechanical work and methods converting power directly from heat. The thesis also contains an overview of case studies for studied technologies. Finally, all the findings are summarised, the factors influencing the applicability of each technology are presented, and the possibilities of the technology application in the industry are evaluated.
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Low-grade heat recovery in industrial processes
Novák, Michal ; Gal, Pavel (referee) ; Havlásek, Martin (advisor)
The bachelor thesis is focused on the waste heat recovery options from industrial processes. The first part is the theoretical introduction into the problematics of the heat transfer. In the next part the most common waste heat sources are presented. The third part summarizes the methods for waste heat recovery. The last, practical part presents the implementation of the waste heat recovery system into the real operation.
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Heat exchanger for waste heat utilization
Švach, Šimon ; Brázdil, Marian (referee) ; Špiláček, Michal (advisor)
This bachelor thesis deals with waste heat recovery using a heat exchanger. The aim of the thesis was to design a heat exchanger for the recovery of hot water from the cooling of a concentrator photovoltaic panel. The thesis is divided into theoretical and practical parts. In the theoretical part, a literature research on heat recovery and photovoltaics was carried out. In the practical part, a heat exchanger has been designed for a specific solution.
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