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Discomfort glare of non-uniform luminaires
Šťastný, Jakub ; Baxant, Petr (referee) ; Škoda, Jan (advisor)
In the field of lighting technology, glare evaluation is one of the basic parameters of determining the quality of lighting systems. Disturbing glare is most often evaluated by UGR in internal systems. The UGR method is well described and verified for uniform glare sources. With the development of LED, non-uniform sources of glare become involved in the lighting system. Thus verification of UGR suitability for non-uniform sources is necessary and possibly modification of the method or replacement it by another more appropriate method is required. This diploma thesis focuses on evaluation methods of disturbing glare from luminaires with non-uniform radiation surface. For this purpose, the thesis includes glare analysis, methods of glare calculation and glare evaluation. Furthermore, the UGR analysis and modification for the calculation of disturbing glare from non-uniform glare sources are included. The practical part is concentrated on measurement of glare from uniform and non-uniform glare sources. For the purpose of evaluating the suitability of the measurement method, the subjective evaluation of glare from a statically significant sample is included in the thesis.
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Unconventional Methods of Measurement in Photometry
Škoda, Jan ; Sokanský, Karel (referee) ; Gašparovský,, Dionýz (referee) ; Baxant, Petr (advisor)
This thesis deals with an unconventional possibility of measuring photometric values and the work is based on analysis of luminance made by commercially available digital photo camera. In the first part is represent an overview of current methods for measuring the photometry. You also can see the basic photometric values and required instrumentation needed to measure them. The focus of the work is concentrated on the description of the problems associated with setting the correct luminance of digital photography. It describes the dependency and correction procedures for calculating fixed luminance ratios of the individual images. The last part of this thesis is devoted to the possible use in practice, especially in the analysis of luminance of objects, luminaires and light sources. It also deals with an alternative description of luminaire and light sources to replace the luminous intensity curve etc.
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Simulation of LED retrofits under operational conditions
Tomeš, Martin ; Pavelka, Tomáš (referee) ; Škoda, Jan (advisor)
This Master’s Thesis on Simulation of LED retrofits under operational conditions is divided into theoretical and practical part. Theoretical part in the introductory section deals with the concepts of lighting technology and presents some electric light sources, such as classic bulbs, halogen bulbs, linear and compact fluorescent lamps. It also describes the principle of electroluminescent light sources (LED), which discusses principles of yielding a white light, the main advantages of LED etc. The reader is familiar with the issue of compensation the linear fluorescent lamps tubular LED source and with the work environment programme ReluxPro that is used for design of the lighting system. Practical part of the thesis is divided into two chapters. In the first chapter, measured linear fluorescent lamps and LED modules for the light-technical parameters, luminous intensity, radiation spectrum and settling time of light sources are evaluated and compared. The second chapter is solved by using ReluxPro, which explores the impact on the lighting and the brightness of the room layout SA 5.10 while using various light sources. In conclusion, there is an economic aspect of linear fluorescent lamps and LED modules analyzed. Results from the program ReluxPro are continuously compared with real measured values.
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Evaluation of LED replacements
Bordovský, Lukáš ; Pavelka, Tomáš (referee) ; Škoda, Jan (advisor)
The aim of my thesis is to become familiar with LED replacements of light sources, possible problems, advantages and disadvantages. In the work are at first explained terms of light technology. Then are concisely described actual light sources, that can be replaced by LED. That concern: classic bulbs, halogen bulbs, linear fluorescents and compact bulbs. After that is described principle of LED light fittings and advantages, disadvantages nowadays to use LED light fittings. The main emphasis is placed on chapter 5. The compensations of linear fluorescents by LED moduls. The following chapters are dedicated to comparison of fluorescent lamps and LED moduls. Involving-photometrics parameters, luminous intensity, lumniance analysis and also economics comparison of lighting systems with fluorescent lamps versus the LED moduls.
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|
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Discomfort glare of non-uniform luminaires
Šťastný, Jakub ; Baxant, Petr (referee) ; Škoda, Jan (advisor)
In the field of lighting technology, glare evaluation is one of the basic parameters of determining the quality of lighting systems. Disturbing glare is most often evaluated by UGR in internal systems. The UGR method is well described and verified for uniform glare sources. With the development of LED, non-uniform sources of glare become involved in the lighting system. Thus verification of UGR suitability for non-uniform sources is necessary and possibly modification of the method or replacement it by another more appropriate method is required. This diploma thesis focuses on evaluation methods of disturbing glare from luminaires with non-uniform radiation surface. For this purpose, the thesis includes glare analysis, methods of glare calculation and glare evaluation. Furthermore, the UGR analysis and modification for the calculation of disturbing glare from non-uniform glare sources are included. The practical part is concentrated on measurement of glare from uniform and non-uniform glare sources. For the purpose of evaluating the suitability of the measurement method, the subjective evaluation of glare from a statically significant sample is included in the thesis.
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|
|
Unconventional Methods of Measurement in Photometry
Škoda, Jan ; Sokanský, Karel (referee) ; Gašparovský,, Dionýz (referee) ; Baxant, Petr (advisor)
This thesis deals with an unconventional possibility of measuring photometric values and the work is based on analysis of luminance made by commercially available digital photo camera. In the first part is represent an overview of current methods for measuring the photometry. You also can see the basic photometric values and required instrumentation needed to measure them. The focus of the work is concentrated on the description of the problems associated with setting the correct luminance of digital photography. It describes the dependency and correction procedures for calculating fixed luminance ratios of the individual images. The last part of this thesis is devoted to the possible use in practice, especially in the analysis of luminance of objects, luminaires and light sources. It also deals with an alternative description of luminaire and light sources to replace the luminous intensity curve etc.
|
|
|
Simulation of LED retrofits under operational conditions
Tomeš, Martin ; Pavelka, Tomáš (referee) ; Škoda, Jan (advisor)
This Master’s Thesis on Simulation of LED retrofits under operational conditions is divided into theoretical and practical part. Theoretical part in the introductory section deals with the concepts of lighting technology and presents some electric light sources, such as classic bulbs, halogen bulbs, linear and compact fluorescent lamps. It also describes the principle of electroluminescent light sources (LED), which discusses principles of yielding a white light, the main advantages of LED etc. The reader is familiar with the issue of compensation the linear fluorescent lamps tubular LED source and with the work environment programme ReluxPro that is used for design of the lighting system. Practical part of the thesis is divided into two chapters. In the first chapter, measured linear fluorescent lamps and LED modules for the light-technical parameters, luminous intensity, radiation spectrum and settling time of light sources are evaluated and compared. The second chapter is solved by using ReluxPro, which explores the impact on the lighting and the brightness of the room layout SA 5.10 while using various light sources. In conclusion, there is an economic aspect of linear fluorescent lamps and LED modules analyzed. Results from the program ReluxPro are continuously compared with real measured values.
|
|
|
Evaluation of LED replacements
Bordovský, Lukáš ; Pavelka, Tomáš (referee) ; Škoda, Jan (advisor)
The aim of my thesis is to become familiar with LED replacements of light sources, possible problems, advantages and disadvantages. In the work are at first explained terms of light technology. Then are concisely described actual light sources, that can be replaced by LED. That concern: classic bulbs, halogen bulbs, linear fluorescents and compact bulbs. After that is described principle of LED light fittings and advantages, disadvantages nowadays to use LED light fittings. The main emphasis is placed on chapter 5. The compensations of linear fluorescents by LED moduls. The following chapters are dedicated to comparison of fluorescent lamps and LED moduls. Involving-photometrics parameters, luminous intensity, lumniance analysis and also economics comparison of lighting systems with fluorescent lamps versus the LED moduls.
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