scholarly journals Natural Lighting Systems Based on Dielectric Prismatic Film

10.5772/50352 ◽  
2012 ◽  
Author(s):  
Daniel Vazquez-Molini ◽  
Antonio Alvarez ◽  
Berta Garcia-Fernandez
Keyword(s):  
Natural Lighting ◽  
Lighting Systems

scholarly journals A COMPREHENSIVE COMPARISON CRITERION OF NATURAL LIGHTING SYSTEMS FOR BUILDINGS

2019 ◽  
Vol 4 (3) ◽  
pp. 35-43
Author(s):  
Марина Кононова ◽  
Marina Kononova ◽  
Мария Жерлыкина ◽  
Mariya Zherlykina ◽  
Анастасия Малышева ◽  
...  
Keyword(s):  
Significant Contribution ◽  
Heat Losses ◽  
Operating Costs ◽  
Customer Requirements ◽  
Capital Costs ◽  
Natural Lighting ◽  
Complex Criterion ◽  
Comprehensive Comparison ◽  
Lighting Systems ◽  
The Individual

Natural lighting systems make a significant contribution to the energy balance of the building. Changing its geometric and optical characteristics affects the illumination in the room and determines the operating costs associated with maintenance, heat and heat losses through translucent fences. The problem of comparison several systems of natural lighting of buildings is considered. For comparison, a complex criterion is proposed that takes into account optical, thermal, operational properties, as well as capital costs. The proposed criterion allows to remove irrelevant indicators for a particular building or add new ones according to customer requirements. The calculated dependences to determine the numerical values of the individual coefficients included in the complex criterion are given. The calculated dependences to determine the numerical values of the individual coefficients included in the complex criterion are presented. The algorithm and the method of application the proposed complex criterion for comparison of natural light systems are developed.

scholarly journals Improving the energy efficiency of lighting systems by the use of solar radiation

2018 ◽  
Vol 70 ◽  
pp. 01013 ◽  
Author(s):  
Sławomir Sowa
Keyword(s):  
Energy Efficiency ◽  
Control System ◽  
Solar Radiation ◽  
Electric Power ◽  
Radiation Energy ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Systems Implementation ◽  
Lighting Intensity ◽  
Lighting Systems

The paper presents two ways of using the solar radiation to limit consumption of the electric power for lighting, i.e., increasing the energy efficiency of lighting systems. The solar radiation energy is a generally available type of renewable energy that to a large extent may influence a reduction in consumption of the electric power for lighting. Facilities designers and architects aim at ensuring the highest possible availability of natural lighting in rooms. Usually, lighting systems are not provided with an appropriate control system using the solar radiation. A lack of means for a correct control of the artificial lighting intensity is a factor hindering an improvement of the energy efficiency of the lighting systems. Implementation of the correct control system is possible when distribution of the lighting intensity in a room is known. The studies conducted in this area are a valuable source of information which can be used to develop control algorithms or determine optimum locations and parameters for installation of lighting fixtures. The second way for improving the energy efficiency of the lighting systems is a use of the solar radiation energy converted to the electric power to supply lighting systems.

Coloured Light as a Tool for Working with Architectural Form in the Night Environment of the City

2021 ◽  
pp. 39-50
Author(s):  
Andrey V. Efimov ◽  
Sergey V. Klimenko ◽  
Natalya G. Panova ◽  
Nikolay I. Shchepetkov
Keyword(s):  
Work Experience ◽  
Material Object ◽  
Architectural Form ◽  
Heritage Sites ◽  
Natural Lighting ◽  
Light Filters ◽  
Lighting Systems ◽  
Object Form ◽  
The Impact ◽  
Historical Periods

For the past decades the light environment of the evening city has become a critical component of the architectural and administrative activities. Today, the lighting systems not only allow making an object or an entire street ‘visible’ in the evening, but also provide for the development of their new architectural image. The opportunities offered by the white artificial light were appreciated to work with the illuminated polychrome objects long ago. The white light with various spectral properties is capable sometimes to influence dramatically the perception of the architectural form, as with its high intensity under the darkness adaptation conditions it has the capability to ‘absorb’ (turn off) the ‘object’ colour of the illuminated facade surface. In particular, the specifics creates an ‘evening’ object image different from the daily one, where the colour scheme used in the material object is often not critical. In contrast, the chromatic light under certain conditions allows not only maintaining the colouristic nature of the environment existing under the natural lighting conditions, but also developing and unifying it in a unique manner, creating a new colour palette. The description of the main areas of the evening environment arrangement with the chromatic light is provided. A significant work experience has been already accumulated in this field by the light design experts. The colour light opportunities and, even more so, the technologies of dealing with it have not been appreciated and adopted by architects to the full extent yet. The article considers the application specifics of the colour light as a fully functional instrument for dealing with the object form under the night urban conditions. The results of an experiment to study the interaction between the colour of material objects and the colour light based on the analysis of Moscow polychrome, which was carried out in the laboratory of the Moscow Architectural Institute (State Academy), are presented. Visual observations enabled to determine the impact of light with the colour light filters selected for the experiment on the colour samples typical for a number of historical periods in the Moscow architecture. The colour samples typical for the facades of buildings erected in a number of historical periods in the capital architecture were illuminated in the darkness with the light of slide projectors with IL and R, G, B glass light filters, and changes in their visual perception were assessed using the NCS atlas, then the identified colour shifts were determined with the use of E. Rabkin’s atlas by three parameters (λ, P, L). A hypothesis was expressed about the possible use of the results of such studies not only in the architectural colour lighting of the modern urban environment, but also in such a new application area as restoration, preservation and interactive integration of the historical and architectural heritage sites into the programmable image-bearing environment.

scholarly journals EVALUASI TINGKAT PENCAHAYAAN RUANG BACA PADA PERPUSTAKAAN UNIVERSITAS BUDI LUHUR, JAKARTA

2019 ◽  
Vol 3 (1) ◽  
pp. 73
Author(s):  
Sri Kurniasih ◽  
Oki Saputra
Keyword(s):  
Energy Conservation ◽  
Reading Room ◽  
Lighting System ◽  
Learning And Teaching ◽  
Natural Lighting ◽  
Average Value ◽  
Visual Aesthetics ◽  
Library Users ◽  
Lighting Intensity ◽  
Lighting Systems

Abstract: The arrangement of architectural light, including natural and artificial, is the ability that is expected to be mastered by the architect because light plays an important role, both in terms of security, health, comfort, and visual aesthetics of buildings.  The existence of libraries in the world of education is highly prioritized, especially at a university to support learning and teaching activities so that the existence of the library should be the center of attention. The library is one of the workplaces where most activities rely heavily on the eyes, therefore good lighting in the library room will improve work comfort for employees and students. Based on SNI 03-6197-2000 concerning Energy Conservation in Lighting Systems, the average lighting level in library reading rooms is 300 lux. This research was carried out with the main objective was to find out the level of lighting in the reading room of the Budi Luhur University library and its compatibility with SNI. The research method used is a quantitative method by reading literature relating to natural lighting, field observation, measuring with a light meter tools. The scope of this research is the level of lighting in the library reading room. The results of this study indicate that the average value of lighting intensity or strong lighting naturally in the library reading room on the 2nd floor is 272 lux, and the library reading room on the 3rd floor is 663 lux. Based on SNI 03-6197-2000 concerning Energy Conservation in the Lighting System, the lighting of the library reading room on the 2nd floor does not meet the standard, while the average value of natural lighting intensity in the reading room on the 3rd floor exceeds the standard and will cause other problems, namely glare which can interfere with the convenience of library users. Keyword: daylighting, illumination, libraryAbstrak: Penataan cahaya arsitektural, meliputi alami dan buatan merupakan kemampuan yang diharapkan dikuasai oleh arsitek karena cahaya memegang peranan penting, baik dari segi keamanan, kesehatan, kenyamanan, maupun estetika visual bangunan. Keberadaan perpustakaan pada dunia pendidikan sangatlah diutamakan, terlebih lagi pada sebuah Universitas untuk mendukung kegiatan belajar dan mengajar maka sudah semestinya keberadaan perpustakaan menjadi pusat perhatian. Perpustakaan merupakan salah satu tempat kerja yang sebagian besar kegiatan sangat mengandalkan mata. Oleh sebab itu pencahayaan yang baik di ruang perpustakaan akan meningkatkan kenyamanan dalam bekerja bagi karyawan dan mahasiswa. Berdasarkan SNI 03-6197-2000 tentang Konservasi Energi pada Sistem Pencahayaan, tingkat pencahayaan rata-rata pada ruang baca perpustakaan adalah 300 lux. Penelitian ini dilakukan dengan tujuan utama adalah mengetahui tingkat pencahayaan pada ruang baca perpustakaan Universitas Budi Luhur dan kesesuaiannya dengan SNI. Metode penelitian yang digunakan adalah metode kuantitatif dengan membaca literatur yang berkaitan dengan pancahayaan alami, observasi lapangan, melakukan pengukuran dengan alat luxmeter. Lingkup penelitian ini adalah tingkat pencahayaan pada ruang baca perpustakaan. Hasil dari penelitian ini menunjukkan bahwa nilai rata-rata intensitas pencahayaan atau kuat penerangan secara alami pada ruang baca perpustakaan di lantai 2 adalah sebesar 272 lux dan pada ruang baca perpustakaan di lantai 3 sebesar 663 lux. Berdasarkan SNI 03-6197-2000 tentang Konservasi Energi pada Sistem Pencahayaan, pencahayaan ruang baca perpustakaan di lantai 2 belum memenuhi stadar, sedangkan nilai rata-rata intensitas pencahayaan alami pada ruang baca lantai 3 melebihi standar dan akan menimbulkan permasalahan lainnya yaitu terjadinya silau (glare) yang dapat mengganggu kenyamanan pengguna perpustakaan.Kata Kunci: Pencahayaan Alami, Intensitas Pencahayaan, Perpustakaan 

scholarly journals Proposal for an Experimental Methodology for Evaluation of Natural Lighting Systems Applied in Buildings

Energies ◽  
2017 ◽  
Vol 10 (7) ◽  
pp. 1014 ◽  
Author(s):  
Anderson Diogo Spacek ◽  
João Mota Neto ◽  
Luciano Dagostin Biléssimo ◽  
Oswaldo Hideo Ando Junior ◽  
Gustavo Pedro De Freitas Neto ◽  
...  
Keyword(s):  
Experimental Methodology ◽  
Natural Lighting ◽  
Lighting Systems

scholarly journals The Impact of Modern Artificial Lighting on the Optimum Window-to-Wall Ratio of Residential Buildings in Jordan

2021 ◽  
Vol 11 (13) ◽  
pp. 5888
Author(s):  
Aiman Albatayneh ◽  
Haya Atieh ◽  
Mustafa Jaradat ◽  
Murad Al-Omary ◽  
Maha Zaquot ◽  
...  
Keyword(s):  
Energy Savings ◽  
Residential Buildings ◽  
Light Emitting Diode ◽  
Residential Building ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Residential Structures ◽  
Lighting Systems ◽  
Ashrae Standards ◽  
The Impact

Energy savings gained through natural lighting could be offset by the loss of energy through windows; therefore, the target of this study is to examine the effects of enhancing the efficiency of lighting systems on the optimum window-to-wall ratio (WWR) of Jordanian residential structures. This research proposes the hypothesis that the WWR of residential structures that contain artificial lighting systems with increased efficiency will be lower than buildings in which solar lighting is provided. The energy simulation tool, DesignBuilder, was used to simulate an intricate model showing a standard Jordanian residential building with a size of 130 m2. The study offers useful guidance regarding the optimum WWR for key decisionmakers when designing energy-efficient residential structures in the context of Jordan. By considering the balance between gains and losses in solar heat and light gain to exploit energy from solar sources with no reverse effects, while making comparisons between different WWR situations, the findings indicate that the typical WWR for residential structures in Jordan that have efficient Light Emitting Diode (LED) systems of lighting installed could be between 25% and 30%, which is lower than the highest WWR stipulated by the ASHRAE standards.

scholarly journals Natural Lighting in Historic Houses during Times of Pandemic. The Case of Housing in the Mediterranean Climate

2021 ◽  
Vol 18 (14) ◽  
pp. 7264
Author(s):  
Carmen Muñoz-González ◽  
Jonathan Ruiz-Jaramillo ◽  
Teresa Cuerdo-Vilches ◽  
Maria Dolores Joyanes-Díaz ◽  
Laura Montiel Vega ◽  
...  
Keyword(s):  
Psychological Impact ◽  
Well Being ◽  
Office Work ◽  
Domestic Spaces ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Heritage Buildings ◽  
Lighting Systems ◽  
Low Incidence ◽  
Working Day

The pandemic generated by the SARS-CoV-2 virus has led to a forced increase in the number of hours spent at home. In many cases, the lockdown situations, both in social and work terms, have meant that homes have suddenly also become workplaces. Based on all the indicators, this new relational scenario in the labor market displays a clear upward trend and is far from being a temporary situation. It is known that sunlight affects people’s circadian rhythm and that its reduction and even absence during this period of isolation has had a psychological impact on the population. This makes it necessary to reconsider the regulations applied in homes, in order to guarantee their habitability, given their recent widespread use as offices, as well as domestic spaces. In historic centers, the comprehensive renovations being carried out include improvements in energy efficiency and thermal comfort, which play a fundamental role. However, the energy consumption linked to artificial lighting and the quality of this lighting itself have remained in the background, as improvement strategies consist mainly in the replacement of incandescent or fluorescent lamps with LED lamps. Prior to the pandemic, the electric consumption of lighting systems accounted for 10–15% of the total, a figure which increased to 40–50% during the lockdown period. Aiming to improve people’s well-being while reducing energy expenditure on lighting, this article presents a quantitative approach to improving the levels of natural lighting in residential heritage buildings located in historic centers. According to data obtained from previous surveys of a sector of the population, homes built prior to 1950 were characterized by good natural lighting conditions and a very low incidence of health issues among occupants compared to contemporary homes. The objective was to quantify the circadian stimulus and lighting levels and to identify the areas or work areas in homes in order to optimize consumption related to lighting and to generate healthy and comfortable spaces. Results show that historic homes have enough naturally lit areas to perform office work during business hours. However, in the most unfavorable seasons, winter and autumn, it is necessary to use artificial lighting at the start and end of the working day.

scholarly journals SIMULATION OF SOLAR ENERGY GAIN THROUGH NATURAL LIGHTING SYSTEMS OF COMPLEX GEOMETRY

2019 ◽  
Vol 2019 (2) ◽  
pp. 1-6
Author(s):  
Volodymyr Yehorchenkov ◽  
◽  
Lidiia Koval ◽  
Oleh Sergeychuk ◽  
Vsevolod Buravchenko ◽  
...  
Keyword(s):  
Solar Energy ◽  
Complex Geometry ◽  
Energy Gain ◽  
Natural Lighting ◽  
Lighting Systems

scholarly journals The Architectural Analysis of the Illuminance Level in the Workspace, Using Natural and Artificial Lighting in Graha Pena Building in Makassar, Indonesia

2021 ◽  
Vol 21 (1) ◽  
pp. 1-12
Author(s):  
Nurul Jamala ◽  
Ramli Rahim ◽  
Sharyzee Mohamad Shukri
Keyword(s):  
Energy Efficient ◽  
Descriptive Analysis ◽  
Building Design ◽  
Building Envelope ◽  
Natural Light ◽  
Architectural Analysis ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Work Area ◽  
Lighting Systems

Energy-efficient building design models are one of the factors that need to be considered in building planning. In the morning to evening, sunlight as a source of natural light can be used as a source of lighting in buildings. By utilizing natural light, it will reduce energy consumption in buildings. Air conditioning and lighting are important factors in designing energy efficient buildings. In this study, analyzing natural and artificial lighting at Graha Pena Makassar Building. The research method is quantitative by measuring and analyzing several workspaces that are directly and indirectly related to openings in the building envelope. statistical descriptive analysis, namely entering data into tables and graphs, then analyzing the level of illumination in the analyzed workspace. The research objective was to determine the level of illuminance in several workspaces with different orientations. How is the effect of natural light distribution on building orientation and how is the artificial lighting system at workspace in the Graha Pena Makassar. The results showed that the orientation of the building had an effect on the distribution of natural light into the space. The spatial orientation facing East has a higher distribution of natural light than that of the south. Workspaces that are not directly related to window openings in the building envelope are using artificial lighting systems in the form of lights. The workspace has uneven illumination levels in its work area, because the layout and placement of lighting points have not been well planned. The contribution of this research is a reference in designing a building facade design with an attractive appearance, and can maximize the use of solar energy as a source of natural lighting, while still paying attention to the visual comfort of space users.

scholarly journals Design schemes’ universalization in calculation of daylight factor under side and roof lighting system in buildings

2020 ◽  
Vol 164 ◽  
pp. 02031
Author(s):  
Sergey Stetsky ◽  
Kira Larionova
Keyword(s):  
Universal Design ◽  
Natural Light ◽  
Lighting System ◽  
Design Point ◽  
Design Formula ◽  
Natural Lighting ◽  
Lighting Systems ◽  
Sky Conditions ◽  
Overcast Sky

The article describes the methods of contemporary daylight factor’ (D.F.) design either with top or side natural lighting systems in buildings. The different methods of design, with different design formulas are based on preliminary determination of the type of lighting system used. But this division is rather conditional and not accurate. Sometimes the source of natural light (say, a window in a wall), which traditionally is judged as a source of a side light, is placed higher, than a monitor or skylight on a roof, which usually are determined as a sources of a top light. The same situation can be seen in determination of an angle of observation of a sky vault portion, observed from a design point within the premise considered. Thus, taking into account the above mentioned statements, one can assume, that with no strict division of external natural illumination under the overcast sky conditions, adopted as a basic theory in contemporary domestic «Codes and Regulations on Natural Lighting of Interiors», it is necessary to offer an universal design formula. This one should be based on standard formulas with respect to specific points, typical either to elements of window, monitor or skylight structures.

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