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Solar heating tap water
Kracík, Petr ; Baláš, Marek (referee) ; Fiedler, Jan (advisor)
This bachelor thesis deals with the heating of hot service water by means of solar energy through solar collectors. At the beginning the author describes the most frequent methods for heating of service water in Czech houses with the help of electrical energy, fossil fuel, gas and central heat supply, including the input expenses for buying equipment. The author describes a solar system and his basic elements and suggests two variants with supplement heating by means of electrical energy, which compares with electrical heating of service water. The overall thesis is conceived as a review of possibilities of heating hot service water in households with economical budget at the end of the work.
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Heat processing principle of operation thermal resistance annealing.
Špičková, Petra ; Humár, Anton (referee) ; Kalivoda, Milan (advisor)
The project assigned for the bachelors study program B 2307 analyses the theory of heat processing in general and furthermore resistance annealing with the focus on the technology developed by the company Heatmasters. Examples of processing methods used at other technology providers are presented, inclu-ding documentation and datasheets. Resistance annealing is based on the heat transfer from a resistive wire, which heats up by electrical current. The thermal energy is then transferred to the target material through heat radiation or con-ductance. The resistance heat processing is used both for welding and for an-nealing. Nowadays is the documentation and recording of the heat processing of significant importance. Possibilities exist that allow recording of temperature during the entire cycle of the heat processing and subsequently providing the result evidence in a form of a certificate.
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Potential of biomass utilization in the Czech Republic
Klímová, Jana ; Otáhal, Jan (referee) ; Košner, Jan (advisor)
Main task of this bachelor work is to focus on splitting and usage of alternative, renewable energy source – biomass, as a source of thermal and combined electrical energy and to review possibility of increasing of consumption of this source on territory of the Czech Republic. In this work certain kinds of biomass, potential and possibility of it’s usage suggestion for utilization, according to Action plan for biomass and main ways of it’s development will be presented.
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New materials in welding technology
Křížek, Stanislav ; Janík, Martin (referee) ; Daněk, Ladislav (advisor)
The bechelor work elaborated in frame of studies branch B2339 deals with weldability of new kinds of steel especially about high-strength steel. This is a literary pursuit that includes problems with weldability, that means standing heat deformation cycle on defect activity in welding connection.
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Study of thermal properties of materials for solar cells lamination
Dohnalová, Lenka ; Matiašovský, Peter (referee) ; Zmeškal, Oldřich (advisor)
The topic of presented bachelor´s thesis was study of thermal properties of materials for solar cells lamination. The main goal of this thesis was measuring and characterisation of the basic thermal properties of volume materials and plastic films, which are used to solar cells lamination. At first a thermal response to a concrete thermal pulse was measured by the thermoelectric thermometer. Then there was studied the distribution of temperature on the surface of a sample during heating and cooling by the non-point heat source. At the beggining of this thesis it was needed to define heat and ways it´s spread, then the basic thermal properties and also methods of their determination. The ways of measuring temperature were described and then used in praxis. My thesis deals with study of thermal properties volume materials. It was needed to characterize measured volume material and define it´s thermal parameters, because the values of thermal parameters of measured samples of lamination films were compared to these values. This thesis is concerned in solar cells too. So there were also described their structure, properties, utilization and way of their production. After the definition of all needed therms the experimental part of this thesis was begun. At first the thermal response of each of the eight different samples was measured by the pulse transient method. Then there was studied the thermal field on the surface of the sample by thermocamera through using the pulse transient method. Findings of both methods were finally compared.
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Chlazení vinutí synchronního motoru s využitím tepelné trubice
Vlach, Radek ; Ondrůšek, Č.
The paper is concerned with computational simulation of stator winding heating of synchronous machine. Software ANSYS 6.1 was used for computational modeling. Computational model consider heat pipe in the middle of winding slot. The results of computer simulation show effect of heat pipe on winding cooling. Other results show effect of heat pipe position and size of cooling surface on winding heating.
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