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Optimisation of light conditions in buildings
Vajkay, František ; Mohelníková, Jitka (advisor)
Building physics as a branch of architecture must ensure an indoor comfort of each user and inhabitant of a building object. This involves, acoustics, indoor thermal conditions and among others also daylighting and artificial lighting of buildings. Light as a particle and an electromagnetic wave, is required by the different aspects of the human organism. It allows the living beings to see, influences skin and bones, the biorhythms, etc. Therefore, it is necessary for the engineering community to predict the correct illuminance and luminance levels acting insides. The thesis deals with such issues. More precisely, it assesses the quality of design tools and methodologies, either against CIE reference cases described in CIE 171/2006 and against real measurements done over the working plane of an indoor space located in the attic of Building D of the Institute of Building Structures, Faculty of Civil Engineering, Brno University of Technology, too. The tools tested throughout the solution of the dissertation did involve three computer programs: RADIANCE, WDLS v3.1 and WDLS v4.1, and one numerographical approach, namely the Daniljuk’s innovated methodology (sometimes even combined with the theories of BRS). In addition several software’s have had been created alongside the process assessment, just to mention the “RADIANCE Script”, “RADIANCE Data Evaluation Script” or “MuuLUX“. The later was written as a communication software allowing the connection of the KONICA-MINOLTA T10 illuminance meter to a computer with the aim of data collection while long term observation. The solution did also require the establishment of a measuring element for the determination of the light reflectance values of surfaces. The solutions, results and conclusions do describe how well did the design approaches deal while predicting the resulting awaited daylight factor levels in points over the working plane.
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Kidsgarden
Kuttelwascherová, Kristína ; Čížek, Roman (referee) ; Daněk, Lukáš (advisor)
This diploma thesis is a project of a two-storey building of a Kindergarten. The building will be used for educating preschool children. On the ground floor, there are two base classrooms, one in each wing of the building. Each classroom has several zones (relaxing, playing, creating). Each classroom also has its own dressing room, washroom + toilets. On the ground floor, we can also find facilities for teachers and the principal office. Since finished food will be delivered, the building only contains a food preparation facility + dry storage. The second floor is accessible either by stairs or by elevator. On the second floor, there is another base classroom with its own dressing room and a washroom with toilet. Food is transported from the first floor by elevator, which is not designed for transporting people. On the second floor, there is also the teacher´s base + large social hall for occasional events. The kindergarten building has an atypical layout. The building is partly roofed by a flat roof and partly by a gabled roof. The project was processed using the computer program AutoCAD. During processing, emphasis was placed on the correct layout, architectural design and safe use of the building.
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Microclimate study rooms with natural ventilation
Hajn, Daniel ; Uher, Pavel (referee) ; Rubinová, Olga (advisor)
Master thesis solves the level of CO2 concentration in the premises of universities in Brno. The main objectives of the processed data measured from two monitored rooms, compare it with the permissible limits of concentration, evaluate the effectiveness of natural ventilation and develop a more efficient way to exchange air with forced venti-lation. Space solutions are part of the Philosophical Faculty of Masaryk University, the fourth above-ground floors of buildings A and B1. The theoretical part deals with CO2 concentrations, measurement methods, the influence of CO2 on the organism and the assessment of daylight.
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Evaluation of the contribution of daylight in the hybrid lighting system
Pavlík, Denis ; Krbal, Michal (referee) ; Škoda, Jan (advisor)
The aim of the bachelor thesis is to evaluate the current status of the associated lighting system in the corridor of the building Technology university of Brno Faculty of Electrical Engineering and Communication Technic 12. The work provides the research of the lighting technologies. The second part focuses on the simulation of the associated lighting system in the computing programs Relux and Vivaldi. The evaluation of the artificial lighting system is done by hand measuring of the object and simulation of the model of the corridor in Relux. Furthermore, there is also a simulation of the associated lighting system with the contribution of daylight according to CIE for the overcast sky prepared in Relux. The simulation of the dynamic lighting scenes is adapted in Vivaldi in order to meet the criteria of standard ČSN 12464-1 for object “corridor”. The program Vivaldi put together the process of the associated lighting system in time and evaluates its economic aspects, too.
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Design and construction of advanced LED lighting system for aquarium
Novák, Pavel ; Škoda, Jan (referee) ; Pavelka, Tomáš (advisor)
The first part of this thesis is devoted to the presentation of light and the basic quantities describing the light and its properties. These quantities are then used to describe the light sources, which is the thesis engaged in in the following section. The light sources are divided into thermal and luminescent. Then, there are described the basic parameters that are monitored when choosing the light source, such as luminous flux, color rendering index, correlated color temperature, mean lifetime, beam angle. Next, the thesis engages in solar radiation, spectrum of radiation, process and the color temperature of daylight and turns to the requirements for the aquarium lighting. According to the requirements for the aquarium lighting, the lighting design is done and it is sought an ideal solution for the aquarium lighting using LEDs. In conclusion of this thesis, there is designed an effective cooling for the LEDs in order to maintain their lifetime and luminous flux as long as possible. Then, it is designed and realized control of the LEDs by the pulse width modulation, prepared software for controlling the lighting depending on the daytime to meet the demands on the aquarium lighting while monitoring the process of the daylight and to look natural.
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Realistic Rendering of a Building with Varying Lighting Conditions
Navrátil, Jan ; Seeman, Michal (referee) ; Herout, Adam (advisor)
This paper is focused on realistic rendering of interior environments with varying lighting conditions. It proposes methods of setting properties of light sources to achieve a specific scene appearence. It mainly works with light comming from a sky and sun to the scene and describes this light in relation to weather conditions, time of day and overcast factor. The goal is creating easily configurable system in which a single parameter change leads to significant change of lighting conditions. All these changes should be presented in a short video.
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Simulace denního světle na základě reálného LED modulu
Mácha, Marek ; Sabol, Dušan
Many lighting companies and light source producers offer daylight simulation on base of different CCT changins. More or less this has nothing to do with real daylight which has completely different spectrum. Our research is focused on complete spectrum of a light source which is able to replace dalyight. As first step we selected reference standard D50. Spectrum of light source matched in 95 % with spectrum of a real daylight with CCT 5000 K. Application for this kind of light source can be in workplace where people works for 3 shifts. Under this conditions is important that human internal clock works optimal as under the normal daylight.
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Normy denního osvětlení: Máme správnou metriku? (zvaný příspěvek)
Raynham, Peter
Daylight in buildings is important in a number of ways and can bring benefits to building users and save energy. There are a number of ways to regulate the quality of daylit environments. The paper studies the way daylight adequacy is controlled in current guidance together with other metrics that are in use. These metrics are compared to developing ideas from the world of electric lighting and a new metric to control daylight adequacy is proposed.
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Všeobecný výpočet vnitřního osvětlení
Panská, Zuzana ; Žák, Petr ; Habel, Jiří
Paper deals with problematic of evaluation artificial and daylight as one medium. By this assumption we have to deal with the different evaluation of each lighting system. Whereas artificial light is evaluated by the measured or calculated value of illuminance stated in lux, daylight is evaluated by the value of daylight factor expressed in %. In paper is discussed the example of the possible lighting calculation by using the light vector to define illuminance in the field of rectangular light source such as window, problematic of various conditions of daylight and possible using of this method.
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Bezokenní prostory z hlediska předpisů, provozu a zdraví
Lepší, Jana
The article will discuss the issue of premises without daylight in terms of people inside. When it is still the combined lighting and when the "windowless room"? Is an area without daylight illumination always completely without holes? Under what conditions can be established and operated "windowless room" at our discretion. Does human ever needs daylight? What this legislation? Effect of lack of daylight to fatigue, The whole issue will be complemented by many images.
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