Design and Construction of an Automated Hybrid Lighting System

2011 ◽  
Author(s):  
Maria M. Pe´rez Sa´nchez ◽  
Josue´ A. Alonzo Chavarria ◽  
Eduardo E. Ordon˜ez Lo´pez
Keyword(s):  
Luminous Flux ◽  
Natural Light ◽  
Artificial Light ◽  
Lighting System ◽  
Light Emitting ◽  
System Components ◽  
Lighting Systems ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit ◽  
Design And Construction

The lighting systems of homes and workplaces today must be constantly redesigned to be environmentally friendly, sustainable, healthy and ergonomic. This requires maximizing the flow of daylight into indoors, minimizing the amount of pollutants used in their manufacture, long durability materials considered in the design, maximizing energy efficiency of the lighting system components, mimicking the spectrum of natural light and providing some control of lighting modes by the user. Taking into account all these considerations, it is proposed the design and construction of an intelligent lighting system that regulates the use of natural and artificial light, prioritizing the availability of the former over the latter in order to be implemented in housing in the region of the Yucata´n peninsula. To achieve this goal, it is designed and built a light sensor with its own signal conditioning circuit, a light tube of stainless steel with luminous flux control, a dimming circuit for a lamp that uses light-emitting diodes (LEDs) and a control system with a PIC18f4550 micro controller.

scholarly journals A Supervisory Control Strategy for Improving Energy Efficiency of Artificial Lighting Systems in Greenhouses

Energies ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 202
Author(s):  
Gianluca Serale ◽  
Luca Gnoli ◽  
Emanuele Giraudo ◽  
Enrico Fabrizio
Keyword(s):  
Control Strategy ◽  
Light Emitting Diode ◽  
Cost Savings ◽  
Energy Performance ◽  
Lighting System ◽  
Light Emitting ◽  
Artificial Lighting ◽  
Lighting Control ◽  
Lighting Systems ◽  
Power Densities

Artificial lighting systems are used in commercial greenhouses to ensure year-round yields. Current Light Emitting Diode (LED) technologies improved the system efficiency. Nevertheless, having artificial lighting systems extended for hectares with power densities over 50W/m2 causes energy and power demand of greenhouses to be really significant. The present paper introduces an innovative supervisory and predictive control strategy to optimize the energy performance of the artificial lights of greenhouses. The controller has been implemented in a multi-span plastic greenhouse located in North Italy. The proposed control strategy has been tested on a greenhouse of 1 hectare with a lighting system with a nominal power density of 50 Wm−2 requiring an overall power supply of 1 MW for a period of 80 days. The results have been compared with the data coming from another greenhouse of 1 hectare in the same conditions implementing a state-of-the-art strategy for artificial lighting control. Results outlines that potential 19.4% cost savings are achievable. Moreover, the algorithm can be used to transform the greenhouse in a viable source of energy flexibility for grid reliability.

Cost-Effective Light-Mixing Module for Solar-Lighting System Appended With Auxiliary RGBW Light-Emitting Diodes

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
An Chi Wei ◽  
Shih Chieh Lo ◽  
Ju-Yi Lee ◽  
Hong-Yih Yeh
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Cylindrical Tube ◽  
Cost Effective ◽  
Lighting System ◽  
Optical Efficiency ◽  
Light Emitting ◽  
Solar Lighting ◽  
Lighting Systems ◽  
Main Components

A light-mixing module consisting of a compound parabolic concentrator (CPC) and a light-mixing tube is proposed herein to realize a uniform and efficient solar-lighting system. In this lighting system, the sunlight collected into a fiber and then guided to an indoor destination is the principal light source, while an auxiliary light source including multiple red, green, blue, and white (RGBW) light-emitting diodes (LEDs) is controlled by an auto-compensating module. To mix the principal and the auxiliary sources and to realize the uniform illumination, the light-mixing tube was coated with BaSO4 and optimized as a cylindrical tube. The design of the light-mixing tube is described and discussed in this article. According to the simulated results, the uniformity and the optical efficiency of the designed light-mixing tube are 82.9% and 85.7%, respectively, while from the experimental results, the uniformity of 85.9% and the optical efficiency of 83.3% have been obtained. In terms of the common indoor-lighting standards and the specifications of commercial components used in lighting systems, the proposed light-mixing module has demonstrated the high uniformity and acceptable optical efficiency. Additionally, since the main components of the light-mixing module can be designed as plastic optics, a cost-effective light-mixing module and a profitable lighting system can be realized. Thus, the performance and the price of the proposed light-mixing module fit the demands of the illumination market, while the proposed system shows the potential for indoor solar-lighting applications.

scholarly journals Plant Productivity in Response to LED Lighting

HortScience ◽  
2008 ◽  
Vol 43 (7) ◽  
pp. 1951-1956 ◽  
Author(s):  
Gioia D. Massa ◽  
Hyeon-Hye Kim ◽  
Raymond M. Wheeler ◽  
Cary A. Mitchell
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Energy Use ◽  
Sole Source ◽  
Light Sources ◽  
Lighting System ◽  
Light Emitting ◽  
Agriculture Industry ◽  
Lighting Systems ◽  
Kennedy Space

Light-emitting diodes (LEDs) have tremendous potential as supplemental or sole-source lighting systems for crop production both on and off earth. Their small size, durability, long operating lifetime, wavelength specificity, relatively cool emitting surfaces, and linear photon output with electrical input current make these solid-state light sources ideal for use in plant lighting designs. Because the output waveband of LEDs (single color, nonphosphor-coated) is much narrower than that of traditional sources of electric lighting used for plant growth, one challenge in designing an optimum plant lighting system is to determine wavelengths essential for specific crops. Work at NASA's Kennedy Space Center has focused on the proportion of blue light required for normal plant growth as well as the optimum wavelength of red and the red/far-red ratio. The addition of green wavelengths for improved plant growth as well as for visual monitoring of plant status has been addressed. Like with other light sources, spectral quality of LEDs can have dramatic effects on crop anatomy and morphology as well as nutrient uptake and pathogen development. Work at Purdue University has focused on geometry of light delivery to improve energy use efficiency of a crop lighting system. Additionally, foliar intumescence developing in the absence of ultraviolet light or other less understood stimuli could become a serious limitation for some crops lighted solely by narrow-band LEDs. Ways to prevent this condition are being investigated. Potential LED benefits to the controlled environment agriculture industry are numerous and more work needs to be done to position horticulture at the forefront of this promising technology.

Performance of chip-on-board and surface-mounted high-power LED luminaires at different relative humidities and temperatures

2018 ◽  
Vol 51 (8) ◽  
pp. 1249-1262
Author(s):  
D Raul ◽  
K Ghosh
Keyword(s):  
Light Emitting Diodes ◽  
Luminous Flux ◽  
Light Sources ◽  
Ambient Conditions ◽  
Light Emitting ◽  
Tropical Conditions ◽  
Temperature Ageing ◽  
Lighting Systems ◽  
State Device ◽  
Solid State Device

In today's world, light-emitting diodes are quickly replacing conventional light sources, both indoors and outdoors. Being a solid-state device, adverse ambient conditions such as high temperature and humidity lead to its poor performances, light quality and longevity. In outdoor applications, exposure to high ambient temperature during daytime, even when the lamp power is off, causes the lamp performance to deteriorate. In tropical countries, the environmental temperature in most of the days is higher than 25℃ and sometimes reaches 50℃. Here, the humidity varies between 30% and 80% and frequently over 80%. Thus, the reliability of the light emitting diodes is a question that needs a thorough study. In line with this, in this study, an effort has been made through an experiment. Here, commercially available surface-mounted device and chip-on-board-based light-emitting diodes are tested through an environmental chamber, and their measured illuminance values were observed by varying the relative humidity. Then, the temperature ageing or stress was set at 60℃ on the above types of light-emitting diodes at power off condition for 6000 hours and after that its luminous flux and spectral distribution were observed. The degradation observed under these conditions may guide designers and manufacturers to upgrade their lighting systems to make them fit for tropical conditions.

Colourising daylight in buildings: Visual responses in a daylit room supplemented with colour-changing light-emitting diode luminaires

2016 ◽  
Vol 27 (1) ◽  
pp. 34-46 ◽  
Author(s):  
Zhonghua Gou
Keyword(s):  
Light Source ◽  
Light Emitting Diode ◽  
Green Light ◽  
Natural Light ◽  
Artificial Light ◽  
Visual Responses ◽  
Light Emitting ◽  
Colour Temperature ◽  
Negative Effect ◽  
Changing Light

This research proposes the use of colour-changing light-emitting diode (LED) luminaires to supplement daylight for more sensory working or living environments. An experiment was conducted to examine a room lit by a mixture of natural light from window walls and artificial light from LED luminaires which could be programmed to produce four colour lights: orange (correlated colour temperature around 2000 K), yellow (around 3000 K), green (around 7000 K) and blue (around 8000 K). Participants were required to answer questions pertaining to function (naturalness of selected objects) and sensation (brightness, relaxation, pleasantness and interest). Generally, when daylight was mixed with warm colour, such as orange or yellow, the room was more interesting. Further comparison pointed out that the green light might have a negative effect for daylight perception. The most important finding is that when daylight was supplemented with the blue LED luminaires, the room was most relaxing, pleasing and natural, which was preferred by participants. The findings of this research would inform architects, designers to decide on how to use coloured luminaires as a supplementary light source for daylight to enhance sensory experience in buildings.

scholarly journals Revision of Smart Street Lighting LED

2019 ◽  
Vol 15 (28) ◽  
Author(s):  
Diego Julián Rodríguez Patarroyo ◽  
Iván Felipe Cely Garzón ◽  
Cristhian Alexander Letrado Forero
Keyword(s):  
Energy Efficiency ◽  
Energy Use ◽  
Light Emitting Diode ◽  
Lighting System ◽  
Street Lighting ◽  
Light Emitting ◽  
The World ◽  
Current Context ◽  
Lighting Systems ◽  
And Performance

Introduction: This Literature Review article is the result of a research on the current situation of smart public lighting systems with light-emitting diode (LED) technology in cities around the world. Problem: How convenient is it to use smart public lighting system with LED luminaires? Objective: To review the context of smart public lighting with LED technology. Methodology: Within this project, a lit review was conducted with more than 50 academic articles found in different databases such as: IEEE Xplore, Scopus, ScienceDirect etc. The selection criteria of the information followed the revision of articles from 2006 to 2018, and also, took into account their installation and performance in different cities and places of the world. Furthermore, articles on polluting and inefficient technologies were excluded. Conclusion: Considering the current context in which LED smart public lighting is, it is more likely to be implemented in the future. Results: Smart LED street lighting systems are more efficient in energy use, leads to savings in costs in medium terms, and finally, present a lower environmental impact compared to conventional lighting systems. Limitations: The review focuses on energy efficiency and economic aspects, not on social aspects. Originality: Smart LED public lighting systems have been researched within the economic and energy efficiency context.

Hybrid of Daylight and LEDs in the Lighting Design of a Tunnel

2013 ◽  
Vol 724-725 ◽  
pp. 965-968
Author(s):  
Si Mei Ji ◽  
Guan Ying Cao ◽  
Ying Ming Gao ◽  
Jing Hui Zhang ◽  
Nian Yu Zou
Keyword(s):  
Energy Saving ◽  
Emission Reduction ◽  
Lighting Design ◽  
Natural Light ◽  
Artificial Light ◽  
Lighting System ◽  
Underground Tunnel ◽  
Light Pipe ◽  
Average Luminance ◽  
Saving Effect

In the paper, the hybrid of daylight and artificial light is designed in the lighting of an underground tunnel in order to achieve the effect of energy saving and emission reduction. Light pipe and LED lamps are arranged in the lighting of the underpass. The software of DIAlux and Skyvision are used to simulate for the average luminance, average illuminance and energy-saving index parameters. The energy-saving effect of hybrid lighting system with natural light and LEDs is analyzed.

scholarly journals Integration of Natural and Artificial Light on Energy Efficiency of the Mega Bank Makassar Tower Building

2021 ◽  
Vol 4 (1) ◽  
pp. 71-80
Author(s):  
Isty Cahyani Ismail ◽  
Ramli Rahim ◽  
Baharuddin Hamzah
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Light Intensity ◽  
Energy Use ◽  
Energy Savings ◽  
Building Design ◽  
Artificial Light ◽  
Lighting System ◽  
Lighting Systems ◽  
Save Energy

One of the largest energy consumers in the world is buildings. The energy consumption comes from the lighting system. Energy use in buildings is generally 25% for lighting systems. The strategy used in building design is to reduce energy consumption while maintaining the best comfort in a building. The application of energy-saving concepts from the building sector is optimizing the lighting system by integrating natural and artificial lighting systems. This study aims to determine the light intensity in the integrated lighting system of natural and artificial manually and also to find out how much energy can be saved with the integrated lighting system manually. The research location is at the Mega Bank Makassar Tower Building. The research sample was selected by purposive sampling and the sixth floor was chosen as the research location. In this study, simulations were carried out using the DIAlux 4.13 program to integrate natural and artificial light and to calculate the amount of energy efficiency in the workspace. To obtain optimal light intensity and energy savings, a simulation was carried out by turning off half the light points in the workspace, especially the light points around the building openings. The simulation results show that the average integrated lighting quality meets the minimum lighting requirements and can save energy usage by up to 50%. Keywords: energy efficiency; integration lighting; workspace

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.

Organic Light Emitting Diodes - Innovative Light Sources

2019 ◽  
pp. 101-107
Author(s):  
Sergei A. Stakharny
Keyword(s):  
Light Source ◽  
Organic Light Emitting Diodes ◽  
Organic Leds ◽  
Light Sources ◽  
High Quality ◽  
Light Emitting ◽  
Organic Light ◽  
Lighting Systems ◽  
Physical Principles ◽  
Prospects Of Application

This article is a review of the new light source – organic LEDs having prospects of application in general and special lighting systems. The article describes physical principles of operation of organic LEDs, their advantages and principal differences from conventional non-organic LEDs and other light sources. Also the article devoted to contemporary achievements and prospects of development of this field in the spheres of both general and museum lighting as well as other spheres where properties of organic LEDs as high-quality light sources may be extremely useful.

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