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Solder Joint Quality based on Heating Factor
Kučírek, Martin ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
Master’s thesis in the theoretical part analyses the heating factor (Q), which has significant share on quality of a solder joint. The practical part describes the design and production of test PCB and setting temperature profiles, SMD resistors soldering by using BiSn solder paste. Shear tests of SMD solder joints were realised and evaluated including isothermal ageing samples. At the end of master’s thesis solder joints visual aspects and defects were evaluated, measurement thickness of intermetallic compound by not only optical microscope but also SEM, discussion about results and Q was evaluated.
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Alternative Energy Resources for Family House
Němec, David ; Brázdil, Marian (referee) ; Špiláček, Michal (advisor)
This bachelor thesis is focused at an issue of thermal energy supply for family houses from renewable resources. The aim of this thesis is to provide a summary of possible thermal energy supplies from renewable resources (solar collectors, heat pumps). After that follows a draft and economic evaluation of these systems for individual sources of thermal energy. In introductory section a solar energy is described. It is a significant part of renewable energy. This part is followed by review with description, composition and principle of individual types of solar collectors and heat pumps. Next part is focused on draft of these systems. Conclusion is then dedicated to energy evaluation of individual designed systems.
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Assessment of cooling and heating factor of real heat pump
Tupcová, Tereza ; Andrys, Petr (referee) ; Rubina, Aleš (advisor)
The diploma thesis deals with the issue of replacement of non-ecological refrigerant R22 according to the requirements of relevant juristic regulations and of subsequent influence of this replacement to the efficiency of air conditioning systems. The theoretical part is focused on proceeding processes in thermodynamic cycles and during heat transfer, then determines calculation of cooling and heating factor in context with experimental measurement. The experimental measurement utilizes to the assessment of operation of heat pump after refrigerant replacement and it is source for the composion of economical evaluation of alternative solutions due to the particular choice of refrigerant replacement.
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Heat pump in cooperation with PV for family house
Drašar, Vojtěch ; Vrána, Michal (referee) ; Mastný, Petr (advisor)
The bachelor thesis deals with the design of a heat pump in cooperation with a photovoltaic system for a family house. The theoretical part describes the principles of the heat pump and the photovoltaic system. The thesis presents the methods of operation of the heat pump, the principles of building cooling, the connection of the PV system to the grid, or the methods of storing excess energy. In the practical part, the consumption of a typical family house has been determined by means of typical supply diagrams. The consumption is based on hourly statistical values for the year 2021. From the obtained values a pump was designed. Another objective of the work was the placement of photovoltaic panels on the roof. The power plant is considered as a hybrid, in order to maximize the consumption of the energy produced and the use of energy at the point of generation. For this, a battery system was also designed. The work includes an energy and economic evaluation, including the payback of the combination. For the economic evaluation, a subsidy from the New Green Savings 2021+ program was considered. The proposed solution has applications in both renovation and new construction, where the emphasis is on minimizing air pollutants and also the use of ecological resources.
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Lead Free Solder Joint Quality based on Heating Factor
Dosedla, Milan ; Zdeněk, Jurčík (referee) ; Starý, Jiří (advisor)
This bachelor’s thesis deals with influence of the heating factor on the quality of lead free solder joints in the reflow soldering process. It summarizes the basic knowledge and some requirements for soldered joints, analyses reflow profiles and presents some of the results published in the literature. Aim of the practical part is by samples soldered with different size of the heating factor determine and evaluate the impact of this factor to the strength and appearance of the final solder joint and the structure and thickness of the intermetallic layers.
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Domestic heat pump
Holinka, Jakub ; Borbély, Richard (referee) ; Fiedler, Jan (advisor)
The aim of this bachelor´s thesis is compensation of primary electric boiler by heat pump for a heating (cooling) and warming-up a hot service water in a family house, which is situated in a village called Skryje 31. These informations are based on a calculation of heat losses. Further i will deal with current state of a heat pumps, grant plan and calculation of heat losses. End of the work delas with an economic return of investment of heat pump, which compairs with electric heating.
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Renewable sources of energy for residential houses.
Bergr, Josef ; Počinková, Marcela (referee) ; Formánek, Marian (advisor)
Aim of the bachelor thesis „Renewable soucers of energy for residential houses“, is the choice of the best alternative heat sources for heating and for hot water from a financial point of view. Therefore, a significant part of the thesis dedicated to economic assessment. In the first part are selected each combination of systems that will be rewarded in the second part are calculated total financial costs over the life of the individual systems. It selected the cheapest system that is subjected to detailed analysis and prepare a chart of financial costs, which is more accurate and performs its design and implementation project. The theoretical part of the legislation mentions and describes the approach to the design of renewable energy and other section is a brief overview of this issue.
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Heat pump for domestic heating
Koubková, Lucie ; Šumpela, Pavel (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis is about using heat pump (HP) to gain energy. The theoretical part contains introduction, historical development of HP, principle of function, description of individual components, working cycle of heat pump and sources of lowpotencial energy and accordingly possible types of heat pumps. The practical part is devoted to proposal of appropriate type of heat pump for heating and warming of tap water for family house and economical evaluation of this solution.
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Reliability of LED Panels Solder Joints
Šimon, Vojtěch ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
Thesis is focused on the effect of heating factor on quality of solder joints. In theoretical part is solved reflow soldering technology, problematice of solder paste choice or criteria of soldering profile setting. The practical part is dedicated to demonstrating the impact of heating factor on solder joint quality. There are used X-Ray analysis, microsections and electron microscopy. In the final part of this thesis are summarized knowledge from theoretical part and experimental obtained results to defend of next steps in diploma thesis.
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