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Applications of thermoelectric generators
Kováč, Samuel ; Konečná, Eva (referee) ; Máša, Vítězslav (advisor)
The work describes the principle of thermoelectric conversion and the phenomenons by which it is mediated, it also deals with the factors that need to be sought in an effort to achieve the best efficiency of thermoelectric conversion. The next part includes an overview of case studies that serve as inspiration for the last, main part of this work, which will deal with the design of thermoelectric generator (TEG) integration. In this work found the procedure of selection of individual components that are not be excluded for the proper functioning of the thermoelectric generator. While the testing is performed on the basis of a mathematical model.It should confirm or refute the implementation of this project. Today, there is an electrical circuit including a thermoelectric generator, a DC converter, and wireless network sensors. The mathematical model confirmed that the TEG would be able to power -pressure, humidity and temperature sensors, at current of 0.314 A. The assumed temperature difference is 70 ° C. The work should acquaint the reader with the main pitfalls of thermoelectric conversion. It could also serve as a support in solving a similar problem of TEG implementation in a particular application.
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Thermoelectric Generators for Micro-CHP Units
Brázdil, Marian ; Navrátil, Jiří (referee) ; Masaryk, Michal (referee) ; Pospíšil, Jiří (advisor)
Small domestic hot water boilers burning solid fuels represent a significant source of air pollu-tion. It is therefore an effort to increase their combustion efficiency and to reduce the produc-tion of harmful emissions. For this reason, the operation of older and currently unsatisfactory types of household boilers has been legally restricted. Preferred types of boilers are low-emission boilers, especially automatic or gasification boilers. Most of them, however, in compar-ison with previous types of boilers, also require connection to the electricity grid. If there is a long-term failure in electricity grid, the operation of newer boiler types is limited. Wood and coal gasification boilers are currently available on the market and can be operated even in the event of a power failure, but only in heating systems with natural water circulation. In heating systems with forced water circulation, these boilers, fireplaces or fireplace inserts with hot-water heat exchangers cannot be operated without external battery supply in the event of a power failure. The dissertation thesis therefore deals with the question of whether it would be possible by thermoelectric conversion of waste heat of flue gases of small-scale low-emission combustion hot water domestic boilers to obtain sufficient electricity, to power supply their circulation pumps and to ensure operation in systems with forced water circulation independently of elec-tricity supply from the grid. In order to answer this question, a simulation tool predicting the power parameters of ther-moelectric generators was created. Compared to previously published works, the calculations and simulations include the influence of the generator on the boiler flue gas functionality. To verify the simulation tool, an experimental thermoelectric generator was built using the waste heat of the flue gas of an automatic hot water boiler for wood pellets. In addition to this genera-tor, there was also created an experimental thermoelectric fireplace insert and other equipment related to these experiments.
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Thermoelectric generators and their use with renewable energy sources
Bajgl, Tomáš ; Radil, Lukáš (referee) ; Baxant, Petr (advisor)
This work revolves around the principle of thermoenergy transforming into electrical energy by using a thermoelectrical generator. It is divided into these sections – theoretical, practical and experimental measurement. In the theoretical section, each thermoelectrical phenomenon is described, the properties of various materials used for production are listed, including their electrical properties and constructions. Then the attention switches to the currently available systems. The practical section includes a design for a device, which purpose is to recharge a mobile phone by using thermoelectric generators, and that section is followed by the elaboration of the measured values.
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Evaluation of the power output characteristics of the small-scale thermoelectric generator
Kluzová, Ivana ; Pospíšil, Jiří (referee) ; Brázdil, Marian (advisor)
This bachelor thesis deals with thermoelectric generators and their applications. The introduction is a list of the most used thermoelectric modules in each applications of generators. A description of individual applications thermoelectric generators, divided by different methods of obtaining the heat, followed by their comparison. In conclusion there is a description of the measurement and evaluation of power parameters of thermoelectric modules and thermoelectric generator tested at the Energy Institute BUT.
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Low potential heat for electrical power generation
Dobiáš, Jiří ; Radil, Lukáš (referee) ; Bartošík, Tomáš (advisor)
This bachelor’s thesis deals with low potential heat sources for electrical power generation. It mentions primarily low potential heat sources, their distribution by origin and where you can find such resources. Another part deals with the technology that uses low potential heat to heat production of higher temperature level and power generation. These are discussed here with a heat pump, regenerative heating, Stirling engine, solar collectors, Peltier cells, etc. In addition is to their use in practice. The last chapter deals with the replacement of the heater in the regeneration heating coil from the solar collectors. It is thus the use of renewable energy sources. Carry out technical and economic calculations for the real utility of such a plan.
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Possibilities of Using Thermoelectric Converters in Power Industry
Halas, Miroslav ; Bartošík, Tomáš (referee) ; Macháček, Jan (advisor)
This thesis deals with thermoelectric transformers and their application in electrical power engineering. First, a theoretical overview is shown within which major personalities of the thermoelectric field are presented. Then, construction, functionality and fabrication materials of the thermoelectric transformer are outlined. The next part covers utilization of thermoelectric transformers within electrical power engineering through the history up until now. Also major world-leading companies are presented. In the practical part, the possibilities of thermoelectric transformers in conjunction with primary power sources are shown. Then, power output of solar thermoelectric transformer during winter is calculated using balance methods. At the end, a design of thermoelectric transformer exploiting waste heat of coal power plant and its rate of return are presented. In the conclusion, findings made during this study are summed and a complex assessment of the topic is done.
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