Pub Date : 2018-09-01DOI: 10.1109/lumenv.2018.8521053
{"title":"Lumen V4 2018","authors":"","doi":"10.1109/lumenv.2018.8521053","DOIUrl":"https://doi.org/10.1109/lumenv.2018.8521053","url":null,"abstract":"","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122617818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521043
A. Wiśniewski
Light management systems are increasingly used in interior and exterior lighting. These systems offer many benefits for users of lighting. One of the most important advantages of these systems is the possibility of saving energy consumption for lighting purposes. Before deciding to use a lighting management system, it is worth knowing what value of savings energy this system will bring in specific case. The article present results of measurements basic light and electric parameters of LED luminaires with the possibility of controlling via DALI signal and obtained on base these measurements characteristic power control. Presented the method of calculating potential energy savings based on the received measurement results. Sources of differences between simulation calculations and real savings in using energy. The article present the differences between the evaluation of savings energy consumption simulation in the DIALUX program and real values. On the example of an existing lighting control system installed in sample room.
{"title":"The Calculation of Energy Saving in use Light Management Systems","authors":"A. Wiśniewski","doi":"10.1109/LUMENV.2018.8521043","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521043","url":null,"abstract":"Light management systems are increasingly used in interior and exterior lighting. These systems offer many benefits for users of lighting. One of the most important advantages of these systems is the possibility of saving energy consumption for lighting purposes. Before deciding to use a lighting management system, it is worth knowing what value of savings energy this system will bring in specific case. The article present results of measurements basic light and electric parameters of LED luminaires with the possibility of controlling via DALI signal and obtained on base these measurements characteristic power control. Presented the method of calculating potential energy savings based on the received measurement results. Sources of differences between simulation calculations and real savings in using energy. The article present the differences between the evaluation of savings energy consumption simulation in the DIALUX program and real values. On the example of an existing lighting control system installed in sample room.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"389 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126744060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521087
Michal Krbal, Jaroslav Štěpánek, J. Nekvapil
The liquid dielectrics are used as an electrical insulation or as a medium for heat transfer in the power energy and high voltage devices such as transformers, HV cables or bushings. However dielectric degradations of these liquids are formed in time, most often caused by chemical pollution, thermal destruction or by the electric field influences. Especially electric strength and dissipation factor of insulating oil are affected by these negative influences. The result is the deterioration of devices isolation, which may cause the termination of devices life or even fire or explosion. To avoid loss of the device and further damage, the oil is periodically sampled from the device. The sample of oil is then analyzed, diagnosed and measured in the laboratory. Electrical parameters, mechanical and optical properties are the most common measured quantities. The optical analysis is usually very fast and reliable. There are many commercial analysis devices available on the market. However, none of them can measure all the parameters according to the standards with user settings. The design and realization of optical diagnostic equipment for analysis of liquid dielectrics according ISO 2049 and EN 60422 are the main contribution of this paper. Next monitored parameter is the spectral absorption and transparency of these liquids in the visible and UV spectrum. The proper function and accuracy of the measured methods will be verified in the Light laboratory and in the CVVOZEPower Laboratory in Brno University of Technology.
{"title":"Analysis of Liquid Dielectrics by Photometric Instruments","authors":"Michal Krbal, Jaroslav Štěpánek, J. Nekvapil","doi":"10.1109/LUMENV.2018.8521087","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521087","url":null,"abstract":"The liquid dielectrics are used as an electrical insulation or as a medium for heat transfer in the power energy and high voltage devices such as transformers, HV cables or bushings. However dielectric degradations of these liquids are formed in time, most often caused by chemical pollution, thermal destruction or by the electric field influences. Especially electric strength and dissipation factor of insulating oil are affected by these negative influences. The result is the deterioration of devices isolation, which may cause the termination of devices life or even fire or explosion. To avoid loss of the device and further damage, the oil is periodically sampled from the device. The sample of oil is then analyzed, diagnosed and measured in the laboratory. Electrical parameters, mechanical and optical properties are the most common measured quantities. The optical analysis is usually very fast and reliable. There are many commercial analysis devices available on the market. However, none of them can measure all the parameters according to the standards with user settings. The design and realization of optical diagnostic equipment for analysis of liquid dielectrics according ISO 2049 and EN 60422 are the main contribution of this paper. Next monitored parameter is the spectral absorption and transparency of these liquids in the visible and UV spectrum. The proper function and accuracy of the measured methods will be verified in the Light laboratory and in the CVVOZEPower Laboratory in Brno University of Technology.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"1994 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130979537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521017
J. Hraška
Traditional daylighting metrics are gradually replaced by metrics based on absolute photometric parameters that are applied over the whole year. This process is at the stage of implementation in the design practice. The move to more realistic measures of daylighting is associated with a number of theoretical and practical problems. This article brings information about family of newly climate-based daylighting metrics that were developed in the world recently. The article also highlights some of the problematic aspects of climate-based daylighting metrics.
{"title":"New Daylighting Metrics","authors":"J. Hraška","doi":"10.1109/LUMENV.2018.8521017","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521017","url":null,"abstract":"Traditional daylighting metrics are gradually replaced by metrics based on absolute photometric parameters that are applied over the whole year. This process is at the stage of implementation in the design practice. The move to more realistic measures of daylighting is associated with a number of theoretical and practical problems. This article brings information about family of newly climate-based daylighting metrics that were developed in the world recently. The article also highlights some of the problematic aspects of climate-based daylighting metrics.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124187462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521178
Jaroslav Štěpánek, J. Skoda, Michal Krbal, Martin Motyčka, J. Nekvapil
This paper is about photobiological safety of LED, especially blue light hazard. All measurements and evaluations was carried out in accordance with lEC/EN 62471. The 10 W LEDs with different spectra were measured. Monochromatic LEDs and white light LEDs were measured. The purpose of this article was to find out how to change of the blue light hazard for different color composition of the emitted spectrum in LEDs with the same power.
本文主要讨论LED的光生物安全性，特别是蓝光危害。所有测量和评估均按照lEC/EN 62471进行。测量了不同光谱的10 W led。测量了单色led和白光led。本文的目的是研究在相同功率的led中，不同颜色组成的发光光谱如何改变蓝光危害。
{"title":"Measurement of Photobiogical Safety for LEDs with Different Spectra","authors":"Jaroslav Štěpánek, J. Skoda, Michal Krbal, Martin Motyčka, J. Nekvapil","doi":"10.1109/LUMENV.2018.8521178","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521178","url":null,"abstract":"This paper is about photobiological safety of LED, especially blue light hazard. All measurements and evaluations was carried out in accordance with lEC/EN 62471. The 10 W LEDs with different spectra were measured. Monochromatic LEDs and white light LEDs were measured. The purpose of this article was to find out how to change of the blue light hazard for different color composition of the emitted spectrum in LEDs with the same power.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"69 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123245640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/lumenv.2018.8521115
{"title":"Reviewing Committee","authors":"","doi":"10.1109/lumenv.2018.8521115","DOIUrl":"https://doi.org/10.1109/lumenv.2018.8521115","url":null,"abstract":"","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117136606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521026
A. Poppe, M. Rencz, G. Hantos, J. Hegedüs, A. Poppe, M. Rencz, G. Farkas, L. Gaal
In the Industry 4.0 era digitalization of design and manufacturing processes takes place. The aim of the Delphi4LED H2020 ECSEL R&D project of the EU (www.delphi4LED.org) is to trigger such a transition in the solid-state lighting industry by developing testing and modelling methodologies aimed at multidomain characterization of LED based products at different levels of integration along the SSL supply chain. In this paper we describe our approaches to creating the appropriate “digital twins” of LED packages, modules and luminaires to be used in virtual prototypes applied in different system level design tasks.
{"title":"Virtual Prototyping of LED Applications through Multi-Domain Models of LED Packages: The “Industry 4. 0”-Like Approach of the Delphi4LED Project","authors":"A. Poppe, M. Rencz, G. Hantos, J. Hegedüs, A. Poppe, M. Rencz, G. Farkas, L. Gaal","doi":"10.1109/LUMENV.2018.8521026","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521026","url":null,"abstract":"In the Industry 4.0 era digitalization of design and manufacturing processes takes place. The aim of the Delphi4LED H2020 ECSEL R&D project of the EU (www.delphi4LED.org) is to trigger such a transition in the solid-state lighting industry by developing testing and modelling methodologies aimed at multidomain characterization of LED based products at different levels of integration along the SSL supply chain. In this paper we describe our approaches to creating the appropriate “digital twins” of LED packages, modules and luminaires to be used in virtual prototypes applied in different system level design tasks.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126860270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521147
Lukáš Linnický, P. Janiga, Roman Dubnička
Lighting systems are currently one of the main uses of electricity. The most popular option for reducing of electricity consumption is the use of dimming. Dimming is a type of regulation in which we can regulate luminous flux of a lamps and luminaires. This system of regulation is used in the road lighting industry, but also in households. Dimming allows adaptation of the lighting system according to specific requirements and various ambient conditions such as traffic density, daylight, etc. The regulation of the luminous flux depending on the dimming system can affect the electrical parameters of the luminaires such as the power factor. The article deals with the electrical parameters of luminaires with various lamps at different types of dimming.
{"title":"Electrical Parameters of Dimmable Luminaire","authors":"Lukáš Linnický, P. Janiga, Roman Dubnička","doi":"10.1109/LUMENV.2018.8521147","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521147","url":null,"abstract":"Lighting systems are currently one of the main uses of electricity. The most popular option for reducing of electricity consumption is the use of dimming. Dimming is a type of regulation in which we can regulate luminous flux of a lamps and luminaires. This system of regulation is used in the road lighting industry, but also in households. Dimming allows adaptation of the lighting system according to specific requirements and various ambient conditions such as traffic density, daylight, etc. The regulation of the luminous flux depending on the dimming system can affect the electrical parameters of the luminaires such as the power factor. The article deals with the electrical parameters of luminaires with various lamps at different types of dimming.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132863157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521069
Woiciech Wojtkowski
The DC-DC power converter for LED automotive lighting applications equipped with a digital temperature sensors is presented in the paper. The LED driver is equipped with the additional temperature measurement circuit based on the digital sensors. Monitoring of the high power diode's temperature is very important in automotive applications. The microcontroller can turn-off the LED when the measured temperature crosses the preset threshold value or can limit the diode's current to prevent the temperature from farther rising. The presented converter has been tested and selected results of laboratory investigations are presented in the paper. The converter works well with whole range of typical automotive supply voltages.
{"title":"LED Power Supply with Thermal Protection for Automotive Application","authors":"Woiciech Wojtkowski","doi":"10.1109/LUMENV.2018.8521069","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521069","url":null,"abstract":"The DC-DC power converter for LED automotive lighting applications equipped with a digital temperature sensors is presented in the paper. The LED driver is equipped with the additional temperature measurement circuit based on the digital sensors. Monitoring of the high power diode's temperature is very important in automotive applications. The microcontroller can turn-off the LED when the measured temperature crosses the preset threshold value or can limit the diode's current to prevent the temperature from farther rising. The presented converter has been tested and selected results of laboratory investigations are presented in the paper. The converter works well with whole range of typical automotive supply voltages.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132840558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/lumenv.2018.8521160
P. Kępa
The use of dipped beam during the day is a substitute for the use of daytime running lights. In order to answer the question whether in photometric terms the dipped beam can replace the daytime running lights, a detailed photometric analysis had to be carried out. The article presents a comparison between two types of lights in the range of the required values of luminosity and the angular ranges of visibility to be replaced by dipped beam.
{"title":"Comparison of the Photometric Requirements for Dipped Beam as a Replacement for Daytime Running Lights","authors":"P. Kępa","doi":"10.1109/lumenv.2018.8521160","DOIUrl":"https://doi.org/10.1109/lumenv.2018.8521160","url":null,"abstract":"The use of dipped beam during the day is a substitute for the use of daytime running lights. In order to answer the question whether in photometric terms the dipped beam can replace the daytime running lights, a detailed photometric analysis had to be carried out. The article presents a comparison between two types of lights in the range of the required values of luminosity and the angular ranges of visibility to be replaced by dipped beam.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121310199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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