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Bivalent heating systém with an air-water heat pump
Tvrdý, Miloslav ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
The work is about bivalent heating system with an air-water heat pump. In the first theoretical part there is described princip, basic partition and possibilities of performance of the heat pumps. There are presented possible secondary sources for bivalent performance, too. In the second part there is processed actual offer of bivalent heating system with an air-water heat pump and there is choosed the optimal solution for heating real family house. There are also presented and confronted possible secondary sources for this solution and there is the confrontation with the others possible heating systems. There is complete economical evaluation in conclusion the work.
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Hybrid microphone preamplifier with variable selection of amplifier technology
Musil, Tomáš ; Levek, Vladimír (referee) ; Háze, Jiří (advisor)
This diploma thesis deals with a basic description of dynamic and condenser microphone, its performance regarding polar patterns and a type of mechanical construction. It also describes a principle of operation of a triode. The thesis deals with selecting of a suitable type of microprocessor to control microphone preamplifier functions. Last part contains a power supply and microphone preamplifier circuits design using a semiconductor and vacuum tube technology.
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Design of heating system reconstruction for family house after complete overcladding
Doležal, Libor ; Janírek, Martin Stanislav (referee) ; Katolický, Jaroslav (advisor)
The thesis deals with the reconstruction of the heating system for a family house after complete overcladding. The first part is dedicated to an introduction of the subject under consideration. The next step is the calculation of heat loss.. A suitable method of insulation including economical recovery was designed according to the research of potential insulation materials, then heat loss were re-calculated. Another point is to determine a suitable temperature gradient and select the most appropriate source of heat and hot water preparation. The pressure loss circuit through the various radiators were calculated and balanced by thermostatic radiator valves. Finally, the insurance elements of the heating system were checked and the drawings documentation were prepared.
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Vacuum tube headphone amplifier
Musil, Tomáš ; Kledrowetz, Vilém (referee) ; Háze, Jiří (advisor)
This Bachelor’s thesis deals with design and realization of vacuum tube headphone amplifier working in class A. There is a closer look into operating principals of vacuum tube, most common types, basic ways to use it in electronic circuit, designing stabilized power supplies and also realization of functional prototype and measuring it’s parameters.
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Hybrid microphone preamplifier with variable selection of amplifier technology
Musil, Tomáš ; Levek, Vladimír (referee) ; Háze, Jiří (advisor)
This diploma thesis deals with a basic description of dynamic and condenser microphone, its performance regarding polar patterns and a type of mechanical construction. It also describes a principle of operation of a triode. The thesis deals with selecting of a suitable type of microprocessor to control microphone preamplifier functions. Last part contains a power supply and microphone preamplifier circuits design using a semiconductor and vacuum tube technology.
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Vacuum tube headphone amplifier
Musil, Tomáš ; Kledrowetz, Vilém (referee) ; Háze, Jiří (advisor)
This Bachelor’s thesis deals with design and realization of vacuum tube headphone amplifier working in class A. There is a closer look into operating principals of vacuum tube, most common types, basic ways to use it in electronic circuit, designing stabilized power supplies and also realization of functional prototype and measuring it’s parameters.
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Design of heating system reconstruction for family house after complete overcladding
Doležal, Libor ; Janírek, Martin Stanislav (referee) ; Katolický, Jaroslav (advisor)
The thesis deals with the reconstruction of the heating system for a family house after complete overcladding. The first part is dedicated to an introduction of the subject under consideration. The next step is the calculation of heat loss.. A suitable method of insulation including economical recovery was designed according to the research of potential insulation materials, then heat loss were re-calculated. Another point is to determine a suitable temperature gradient and select the most appropriate source of heat and hot water preparation. The pressure loss circuit through the various radiators were calculated and balanced by thermostatic radiator valves. Finally, the insurance elements of the heating system were checked and the drawings documentation were prepared.
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Bivalent heating systém with an air-water heat pump
Tvrdý, Miloslav ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
The work is about bivalent heating system with an air-water heat pump. In the first theoretical part there is described princip, basic partition and possibilities of performance of the heat pumps. There are presented possible secondary sources for bivalent performance, too. In the second part there is processed actual offer of bivalent heating system with an air-water heat pump and there is choosed the optimal solution for heating real family house. There are also presented and confronted possible secondary sources for this solution and there is the confrontation with the others possible heating systems. There is complete economical evaluation in conclusion the work.
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Microclimatic conditions in train, public city transport and long distance transport driver´s cabins
VÍT, Zbyněk
In my paper I´ve intended to collect theoretical knowledge of the issue of microclimatic conditions in the workplace and it´s impact on health and performance of the worker with the scope to workplaces ? cabins of train, city public transport and long distance transport drivers. I have proceeded from legally binding regulations. In the theoretical part I have described particular requirements and limits of factors affecting the quality of the inner workplace environment. After the theoretical part I have dealt with the practical part where I have proceeded from measurements which I have attended personally. I have completed my own measurements with the results of other measurement records elaborated by State Health Institute in Prague. Perspective measurements were interesting due to the ways technical devices were working and set to provide optimum microclimatic conditions in workplace. The largest measurement results were those from electric train units, known in our railway transport system as ?Pendolino?. While in the workplaces of engine drivers the set year-long inner environment limits have been mainly implemented, in the driver workplaces of public city and long distance transport, summer outside conditions had an impact on significant worsening of the microclimatic conditions ? a big temperature load on drivers, which is impossible to be eliminated without financially demanding measures.
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