Analysis of UGR Values and Results of UGR Calculations in Commercial Lighting Simulation Software

2015 ◽  
Vol 11 (3) ◽  
pp. 141-154 ◽  
Author(s):  
A-Rom Son ◽  
In-Tae Kim ◽  
An-Seop Choi ◽  
Min-Ki Sung
Keyword(s):  
Simulation Software ◽  
Lighting Simulation

scholarly journals Measuring the Lighting Quality in Academic Institutions: The UPM Faculty of Aerospace Engineering (Spain)

2020 ◽  
Vol 10 (23) ◽  
pp. 8345
Author(s):  
María Zamarreño-Suárez ◽  
Daniel Alcala-Gonzalez ◽  
Daniel Alfonso-Corcuera ◽  
Santiago Pindado
Keyword(s):  
Measured Data ◽  
Simulation Software ◽  
Aerospace Engineering ◽  
Fine Tuning ◽  
Current Status ◽  
Test Results ◽  
Wear And Tear ◽  
Lighting Simulation ◽  
Low Levels ◽  
Lighting Systems

This article analyzes the current status of the lighting quality at the Escuela Técnica Superior de Ingeniería Aeronáutica y del Espacio (ETSIAE), the aerospace engineering faculty at the Universidad Politécnica de Madrid (UPM), and evaluates possible improvement actions based on the use of DIALux® lighting simulation software together with measured data. The results show rather low levels of measured illuminance on classroom desks and blackboards in one of the buildings comprising the faculty. The improvements proposed (a new coat of paint on the walls and replacement of luminaires) were simulated in four individual classrooms representing all rooms in two of the ETSIAE buildings (where the lower illuminance levels were measured). In order to study these improvements, the current situation of the four selected classrooms was simulated using DIALux® and fine-tuning attenuation of the luminaires to take into account their wear and tear. The correlation between the DIALux® simulation and the test results was analyzed with quite good results. The results clearly reveal a need to fully replace the classroom lighting systems in ETSIAE building A (the oldest building, dating back to 1955). According to the results from the selected classrooms, the average lighting over the desks can be greatly improved by using LED technology in order to meet UNE 12464-1 standard (that is, 500 lx, from an initial situation with much lower illuminance values: 129 lx to 295 lx). This article represents an innovative way to perform lighting improvement projects as real measured lighting data is used as initial input for the lighting simulations.

scholarly journals Visualization and Analysis of Lighting Design Alternatives in Simulation Software

2017 ◽  
Vol 869 ◽  
pp. 212-225 ◽  
Author(s):  
Diana Fernandez-Prieto ◽  
Hans Hagen
Keyword(s):  
Design Process ◽  
Lighting Design ◽  
Simulation Software ◽  
Test Case ◽  
Interactive Exploration ◽  
Software Packages ◽  
Design Alternatives ◽  
Lighting Simulation ◽  
Simulation Results ◽  
Visualization Techniques

For decades, multiple lighting simulation software packages and plugins for commercial software have been developed in an effort to ease the usage and integration of simulation into the lighting design process. In this effort, one of the main challenges is to provide lighting designers with an easy and comprehensive access to simulation results. Visualization is used as a means to achieve this goal. In this paper, we explore two of the most used free lighting simulation packages towards the identification of visualization techniques that facilitate the access to the simulation results as well as the identification of opportunities for the enhancement of simulation-assisted lighting design processes. A test case of a metal workshop illustrates the output produced by both software packages. Based on this exploration, we identified an open gap regarding three main aspects: interactive exploration of simulation results, visualization of compliance with lighting standards, and visual comparison of lighting solutions. We provide a discussion on how approaches from other domains can be applied to close this gap.

scholarly journals Discomfort Glare Evaluation using DIALux Lighting Simulation software and using developed Python Program model

2018 ◽  
Vol 20 (2) ◽  
pp. 44-50
Author(s):  
Jayashri Aniket Bangali
Keyword(s):  
Bright Light ◽  
Simulation Software ◽  
Visual Sensation ◽  
Light Sources ◽  
Program Model ◽  
Conference Room ◽  
Discomfort Glare ◽  
Lighting Simulation ◽  
Disability Glare ◽  
Comparison Of The Results

Glare is a visual sensation caused by excessive brightness. It is subjective and person dependent. So, it is very difficult to measure glare factor accurately. Glare can be disabling or uncomfortable.  Disability glare is the reduction in vision caused by bright light sources and it can be increased with the age of a person. Discomfort glare is a sensation of irritation due to bright light sources. There are various methods to evaluate discomfort glare. These methods are discussed in this paper. This paper mainly focuses on two methods of discomfort glare evaluation; Unified Glare Rating (UGR) and Daylight Glare Probability (DGP). These glare factors are calculated by using DIALux lighting simulation software and by using developed program. The experimentation was carried out in two different spaces; Conference room and Optoelectronics laboratory. The values of UGR, daylight factor are calculated by using DIALux and developed program. The comparison of the results obtained is discussed at the end of this paper.

Daylight for Spaces Defined by Movable Walls

2015 ◽  
Vol 808 ◽  
pp. 239-245
Author(s):  
Daniel Banyai ◽  
Mihai Dragomir ◽  
Ştefan Bodi
Keyword(s):  
Present Article ◽  
3D Modeling ◽  
Simulation Software ◽  
Natural Sunlight ◽  
Interior Spaces ◽  
Lighting Conditions ◽  
Start Up ◽  
Modeling Software ◽  
Lighting Simulation ◽  
Lighting Systems

The present article deals with the designing proper interior spaces in a reconfigurable manner while at the same time ensuring the much needed daylight for people spending a considerable amount of times indoors. The necessity for this study has appeared as part of a design effort of a furniture start-up company interested in producing movable walls for office and conference spaces, when it became apparent that many times the spaces obtained in this way are devoid of natural sunlight. 3D modeling software was used for creating the desired configuration and a specialized lighting simulation software, DIALux, was employed to study the possibilities of improving lighting conditions. The paper presents an approach that can be used to design and configure hybrid lighting systems, obtaining improvements in lighting costs of up to 30% for interior spaces defined by movable walls.

scholarly journals Automatic testing of interactive lighting simulation software package

2018 ◽  
pp. 1-19
Author(s):  
Evgeny Yurievich Denisov ◽  
Alexey Gennadievich Voloboy ◽  
Irina Aleksandrovna Kalugina
Keyword(s):  
Software Package ◽  
Simulation Software ◽  
Automatic Testing ◽  
Lighting Simulation

Direct illuminance caching: a way to enhance the performance of RADIANCE

2002 ◽  
Vol 34 (4) ◽  
pp. 333-343 ◽  
Author(s):  
Carsten Bauer
Keyword(s):  
Source Code ◽  
Simulation Software ◽  
Light Sources ◽  
Image Generation ◽  
Accurate Calculation ◽  
Software Suite ◽  
Light Component ◽  
Performance Reduction ◽  
Lighting Simulation ◽  
Key Features

The RADIANCE lighting simulation software suite has proven itself a valuable means of producing visualizations and enabling analysis of all kinds of lighting tasks. One of its key features is the accurate calculation of the indirect light component by hemisphere sampling throughout the scene. Currently, there is a certain amount of redundancy within the algorithm. The performance reduction caused by this increases strongly with the number of light sources and becomes significant when more than five sources are present. A method for circumventing this redundancy is presented and its potential for considerably reducing rendering time is shown. The limitations of the new method are discussed and guidelines for its use are given, followed by some remarks on image generation for presentation purposes. The source code of the additional module is provided for downloading.

Effect of Light Reflectance of External Surfaces on Daylight Factor

2014 ◽  
Vol 1041 ◽  
pp. 399-402
Author(s):  
Lenka Gábrová
Keyword(s):  
Simulation Software ◽  
Internal Environment ◽  
Light Reflectance ◽  
Lighting Simulation ◽  
The Impact ◽  
Effect Of Light

Daylighting is one of the important factors in the internal environment of buildings. The quality and quantity of daylighting depends on many factors including distances, heights, shapes and reflectance of surrounding external obstacles and ground reflectance. The quantity of daylighting is evaluated using the Daylight Factor. The case study carried out on a lighting simulation software and presented in this article demonstrates the influence of the light reflectance of external surfaces on the Daylight Factor. The aim of the article is the comparison and evaluation of the impact of the light reflectance of the external surfaces on the Daylight Factor.

scholarly journals Optimizing Natural Light Distribution for Indoor Plant Growth Using PMMA Optical Fiber: Simulation and Empirical Study

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Bahram Asiabanpour ◽  
Alejandra Estrada ◽  
Ricardo Ramirez ◽  
Marisa S. Downey
Keyword(s):  
Light Intensity ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Indoor Environment ◽  
Uv Light ◽  
Simulation Software ◽  
Output Intensity ◽  
Lighting Simulation ◽  
Fiber Output ◽  
Sunlight Intensity

Daylighting methods have evolved along with the impetus to reduce the total nonrenewable utility energy consumed by lighting. In general, daylighting systems are an efficient method of delivering light for indoor applications. However, there is little research looking specifically at indoor agriculture applications. Today, optical fibers are commonly used in various applications including imaging, lighting, and sensing. Our study simulated and tested the efficiency of an optical fiber daylighting system in an indoor environment. We tested the illumination performance of optical fibers and specifically looked at light intensity, light uniformity, and the spectrum of 20 mm and 3 mm optical fibers at five distances by offsetting a spectrometer. The scenarios were first modeled and tested using lighting simulation software. Similar settings were then empirically implemented and measured. The results showed that a difference in diameter had an effect on light intensity and light uniformity; the larger the diameter the better the light uniformity and light intensity. Further, the distance at which the spectrometer was placed in reference to the light source showed a relationship between both light intensity and light uniformity; the smaller the distance the more the intensity and the less the uniformity. Additionally, the experiments showed that sunlight intensity was 30 times and 140 times greater than optical fiber output intensity in the absence of any UV filter and presence of UV light, respectively.

Could biomass-fueled boilers be operated at higher steam temperatures? Part 3: Initial analysis of costs and benefits

TAPPI Journal ◽  
2014 ◽  
Vol 13 (8) ◽  
pp. 65-78 ◽  
Author(s):  
W.B.A. (SANDY) SHARP ◽  
W.J. JIM FREDERICK ◽  
JAMES R. KEISER ◽  
DOUGLAS L. SINGBEIL
Keyword(s):  
Flue Gas ◽  
Power Plants ◽  
Superheated Steam ◽  
Black Liquor ◽  
Simulation Software ◽  
Operating Conditions ◽  
Costs And Benefits ◽  
Steam Generation ◽  
Fireside Corrosion ◽  
Corrosion Resistant

The efficiencies of biomass-fueled power plants are much lower than those of coal-fueled plants because they restrict their exit steam temperatures to inhibit fireside corrosion of superheater tubes. However, restricting the temperature of a given mass of steam produced by a biomass boiler decreases the amount of power that can be generated from this steam in the turbine generator. This paper examines the relationship between the temperature of superheated steam produced by a boiler and the quantity of power that it can generate. The thermodynamic basis for this relationship is presented, and the value of the additional power that could be generated by operating with higher superheated steam temperatures is estimated. Calculations are presented for five plants that produce both steam and power. Two are powered by black liquor recovery boilers and three by wood-fired boilers. Steam generation parameters for these plants were supplied by industrial partners. Calculations using thermodynamics-based plant simulation software show that the value of the increased power that could be generated in these units by increasing superheated steam temperatures 100°C above current operating conditions ranges between US$2,410,000 and US$11,180,000 per year. The costs and benefits of achieving higher superheated steam conditions in an individual boiler depend on local plant conditions and the price of power. However, the magnitude of the increased power that can be generated by increasing superheated steam temperatures is so great that it appears to justify the cost of corrosion-mitigation methods such as installing corrosion-resistant materials costing far more than current superheater alloys; redesigning biomassfueled boilers to remove the superheater from the flue gas path; or adding chemicals to remove corrosive constituents from the flue gas. The most economic pathways to higher steam temperatures will very likely involve combinations of these methods. Particularly attractive approaches include installing more corrosion-resistant alloys in the hottest superheater locations, and relocating the superheater from the flue gas path to an externally-fired location or to the loop seal of a circulating fluidized bed boiler.

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