Wyniki wyszukiwania - Biblioteka Nauki

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Oprawy rastrowe do świetlówek T5

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Pracki P.

Śląskie Wiadomości Elektryczne

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2005

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tom Nr 5 (62)

17--19

PL

W artykule przedstawiono: historię rozwoju świetlówek liniowych, własności i parametry świetlówek TS, cechy układu stabilizacyjno-zapłonowego do świetlówek TS i charakterystykę opraw rastrowych do tych świetlówek. Omówiono i pokazano przykłady zastosowania opraw rastrowych podsufitowych i wieszakowych z świetlówkami TS. Podsumowano i podkreślono zalety opraw rastrowych do świetlówek TS, które pozwalają zakwalifikować te oprawy do grupy urządzeń energooszczędnych.

EN

The paper describes history of development of linear fluorescent lamps, features and parameters of fluorescent lamps TS, features of stabilizing-ignition network for fluorescent lamps TS and characteristic of raster-luminaires for there fluorescent lamps. The paper describes and shows also and showed examples applications ceiling and pendant raster-luminaires with fluorescent lamps TS. Recapitulated and emphasized are qualities of raster-luminaires, which tolerate to classify this luminaries to energy-saving devices.

2

Analysis of the general index of modelling in interior lighting

63%

Pracki P. , Komorzycka P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2024

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tom Vol. 72, nr 3

art. no. e149233

EN

Directionality of light and modelling effects impact lighting quality in interiors. Modelling effects depend on the photometric characteristics of luminaires and their layout but also interior size and reflectance. This research aims to evaluate lighting design limitations and the characteristics of the impact of interior and luminaires on modelling effects, as well as elaborate a prediction method of modelling effects in interior lighting. The general index of modelling was used for the analysis of modelling effects in interiors. The implementation of the research objectives was based on simulation and statistical analysis. 432 situations, varied interior size, and reflectance, the lighting class, luminaire downward luminous intensity distribution, and layout were considered. The results show that achieving the required range of the general index of modelling in interior lighting is substantially limited. The general index of modelling is impacted the most by the layout of luminaires. The elaborated multiple linear regression models can have a practical use for interior lighting design and analysis in terms of obtaining the required range of the general index of modelling.

3

Ocena możliwości zastosowania organicznych diod świecących do oświetlenia wnętrz

63%

Żerańska E. , Pracki P.

Elektronika : konstrukcje, technologie, zastosowania

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2020

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tom Vol. 61, nr 6

4--10

PL

W artykule przedstawiono wybrane zagadnienia dotyczące organicznych diod świecących OLED i ich wykorzystania do oświetlenia pomieszczeń. We wprowadzeniu omówiono strukturę źródeł OLED i sposób wytwarzania światła. W części praktycznej pracy, przedstawiono wyniki symulacji komputerowych parametrów oświetleniowych w ośmiu pomieszczeniach. Do oświetlenia posłużyły typowe moduły OLED, których liczbę i rozmieszczenie dobrano pod kątem uzyskania wymaganych poziomów średniego natężenia i równomierności oświetlenia pól pracy. Analizowano poziomy względnych natężeń oświetlenia sufitu i ścian, oraz cylindrycznego płaszczyzny odniesieniowej, a także mocy skorygowanej oświetlenia. Uzyskane wyniki pokazują, że zastosowanie lokowanych sufitowo modułów OLED prowadzi do stosunkowo wysokich poziomów wszystkich analizowanych względnych natężeń oświetlenia, co przekłada się na dobre nasycenie światłem pomieszczeń. Jest to efekt korzystny. Niestety, w analizowanych sytuacjach uzyskano poziomy wskaźnika olśnienia przykrego wyższe od 19 i wysokie poziomy mocy skorygowanej oświetlenia: dla siedmiu przypadków wyższe od 4 W/m² na 100 lx, a dla trzech przypadków wyższe od 8 W/m² na 100 lx. Jest to rezultat relatywnie niskiej skuteczności świetlnej modułów OLED i niskiej sprawności oświetlenia rozwiązań oświetleniowych. Konieczne jest udoskonalanie technologii OLED, aby ich wykorzystanie do oświetlenia wnętrz mogło być bardziej racjonalne i powszechne.

EN

The article presents selected issues regarding organic light-emitting diodes OLED and their use for interior lighting. In the introduction the structure of OLEDs and production of light were discussed. In the practical part of the work, the results of computer simulation of lighting parameters in eight interiors were presented. Typical OLED modules were used for simulation, the number and layout of which were selected in order to obtain the required level of average illuminance and uniformity on task area. The levels of relative ceiling and wall illuminances, cylindrical illuminance on reference plane, and lighting system normalised power density were analysed. The obtained results showed that the use of the ceiling OLED modules led to relatively high levels of the all analysed relative illuminances, which corresponded to good lighting saturation in the interiors. This is a beneficial effect. Unfortunately, in the analysed cases high levels of unified glare rating, higher than 19, were obtained and high levels of lighting normalised power density were obtained: higher than 4 W/m² per 100 lx for seven cases and higher than 8 W/m² per 100 lx for three cases. This was the result of relatively low luminous efficacy of the OLED modules and low utilisation factor of the lighting solutions. It is necessary to improve OLED technology to provide more rational and common use in interior lighting.

4

Analysis of residential lighting in Poland: results from a winter term survey

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Pracki P. , Aslanoglu R. , Kazak J. K. , Ulusoy B. , Yekanialibeiglou S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2022

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tom Vol. 70, nr 6

art. no. e143107

EN

In 2020, an international project on residential lighting started and was implemented in four countries (Poland, Sweden, UK and Turkey). This article presents the results of a survey carried out in Poland, in the winter term between November 2020 and January 2021. A total of 125 Polish residents (59 women, 65 men, one person did not wish to specify gender) participated in the survey. A variety of data was collected on the respondents and their assessments as well as on their satisfaction with day- and artificial lighting in residential living spaces. The results from questionnaires were analyzed with STATISTICA 13.3. Descriptive statistics and Spearman rank order correlations were adopted to identify the light-related aspects, lighting patterns, and respondents’ perception of day- and artificial lighting conditions in living areas. The results revealed that satisfaction with daylighting in the living area, both in summer and winter, was significantly correlated with daylighting level, daylighting uniformity, sunlight exposure and view-out. The results also revealed that satisfaction with artificial lighting was significantly correlated with artificial lighting level, artificial lighting uniformity and color rendering. The results provide valuable information on lighting and factors that influence the luminous environment in residential living spaces.