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Comparative simulation of the skylights
Dvořáček, Jakub ; Motyčka, Martin (referee) ; Nekvapil, Jan (advisor)
The thesis deals with simulations of daylight transmission through skylights and detection of differences in results in variance simulation softwares. The aim of this work was to find out if the simulation programs calculate the same results for the same parametric situation. The skylights were simulated in TracePro, Holigilm and Tube Eff Tool. The results were always different. In results appeared tendency reducing of differencies caused lenghtening of skylight route.
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Influence of parameters on the efficiency of transmission of light through a skylight
Tioka, Jakub ; Motyčka, Martin (referee) ; Nekvapil, Jan (advisor)
This thesis deals with the possibilities of daylight illumination in building interiors using vertical hollow light guides. The influence of parameters on the change of transmission properties of skylights is observed. The results of the simulations quantify the light transmission efficiency of different composition of hollow light guides and refer to parameters that significantly affect light transmission. The result of the thesis allows users and companies to simpler select the parameters of light guide components to get the optimal variant according to their requirements.
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Exercise bicycle for accumulator charging
Nekvapil, Jan ; Procházka, Petr (referee) ; Knobloch, Jan (advisor)
Bachelor thesis is about possible solution construction of exercise bicycle with electric part working as a electric source. The first part of document introduces readers to issues about lead acid accumulators and charging, electronically commutated motors and electric converters. The second part shows potential solving constitution of exercise bicycle and we choose components and devices. EC motor will be connected with exercise bicycle by chain transmission. Transfer energy is realized through diodes rectifier to DC-circuit and then by boost converter to two lead-acid accumulators in series. Document show possible solutions of electric schema and circuit board with suitable electronic components. At the end of the document is compared existing similar products.
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Exercise bicycle for accumulator charging
Nekvapil, Jan ; Španěl, Petr (referee) ; Knobloch, Jan (advisor)
Semestral thesis is about possible solution construction of exercise bicycle with electric part working as a electric source. The first part of document introduces readers to issues about lead acid accumulators and charging, electronically commutated motors and electric converters. The second part shows potential solving constitution of exercise bicycle and we choose components and devices. EC motor could be connected with exercise bicycle by flat belt. Transfer energy is realized through active rectifier and simultaneously step-up converter to DC-circuit and accumulators. At the end of the document is compared existing similar products.
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Control of three-phase asynchronous motor
Nekvapil, Jan ; Huták, Petr (referee) ; Klíma, Bohumil (advisor)
This theses concern proposal and implementation asynchronous motor control algorithm in the processor DSP56F807 from the manufacturer Freescale. The complex design of applicable control algorithm and suitable interconnection with processor and outer component is solved in this work. Integral part is also choosing of suitable power elements of inverter and sensors.
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Influence of optical elements on the tubular skylights efficiency
Nekvapil, Jan ; Mohelníková, Jitka (referee) ; Škoda, Jan (advisor)
This thesis deals with the measurement of light tubes efficiency in laboratory conditions during lighting by almost direct light rays. It also deals with the measurement of the spectral reflectance of the reflective materials available on the Czech market. The comparison of the efficiency of different light routes and also the determination of the spectral qualities of different reflective materials are the aims of this thesis. The light tubes were measured by means of the cubic integrator. The light source was moved and manoeuvred by means of the automatic goniophotometer. The light source flow was determined by the method of the zonal flows. The data were calculated in the Matlab programme. The evaluation is both in the graphic and in the numeric forms. The result of the thesis is both the comparison of the reflective materials for light tubes qualities, and the evaluation of efficiency of the assigned light routes. The optimal variant can be then selected during designing of the light tubes route according to the results of the measurements.
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Influence of parameters on the efficiency of transmission of light through a skylight
Tioka, Jakub ; Motyčka, Martin (referee) ; Nekvapil, Jan (advisor)
This thesis deals with the possibilities of daylight illumination in building interiors using vertical hollow light guides. The influence of parameters on the change of transmission properties of skylights is observed. The results of the simulations quantify the light transmission efficiency of different composition of hollow light guides and refer to parameters that significantly affect light transmission. The result of the thesis allows users and companies to simpler select the parameters of light guide components to get the optimal variant according to their requirements.
|
|
|
Comparative simulation of the skylights
Dvořáček, Jakub ; Motyčka, Martin (referee) ; Nekvapil, Jan (advisor)
The thesis deals with simulations of daylight transmission through skylights and detection of differences in results in variance simulation softwares. The aim of this work was to find out if the simulation programs calculate the same results for the same parametric situation. The skylights were simulated in TracePro, Holigilm and Tube Eff Tool. The results were always different. In results appeared tendency reducing of differencies caused lenghtening of skylight route.
|
|
|
Influence of optical elements on the tubular skylights efficiency
Nekvapil, Jan ; Mohelníková, Jitka (referee) ; Škoda, Jan (advisor)
This thesis deals with the measurement of light tubes efficiency in laboratory conditions during lighting by almost direct light rays. It also deals with the measurement of the spectral reflectance of the reflective materials available on the Czech market. The comparison of the efficiency of different light routes and also the determination of the spectral qualities of different reflective materials are the aims of this thesis. The light tubes were measured by means of the cubic integrator. The light source was moved and manoeuvred by means of the automatic goniophotometer. The light source flow was determined by the method of the zonal flows. The data were calculated in the Matlab programme. The evaluation is both in the graphic and in the numeric forms. The result of the thesis is both the comparison of the reflective materials for light tubes qualities, and the evaluation of efficiency of the assigned light routes. The optimal variant can be then selected during designing of the light tubes route according to the results of the measurements.
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Exercise bicycle for accumulator charging
Nekvapil, Jan ; Procházka, Petr (referee) ; Knobloch, Jan (advisor)
Bachelor thesis is about possible solution construction of exercise bicycle with electric part working as a electric source. The first part of document introduces readers to issues about lead acid accumulators and charging, electronically commutated motors and electric converters. The second part shows potential solving constitution of exercise bicycle and we choose components and devices. EC motor will be connected with exercise bicycle by chain transmission. Transfer energy is realized through diodes rectifier to DC-circuit and then by boost converter to two lead-acid accumulators in series. Document show possible solutions of electric schema and circuit board with suitable electronic components. At the end of the document is compared existing similar products.
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