Difference between revisions of "Current DTN projects"
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Lighting accounts for around 17% of India’s electricity consumption. Increasing the energy efficiency of lighting is one way to make enormous savings on both power generation and the investment required to light up the lives of the 44% of Indians who still rely on the flickering flame of a kerosene lamp to pierce the darkness of their nights. | Lighting accounts for around 17% of India’s electricity consumption. Increasing the energy efficiency of lighting is one way to make enormous savings on both power generation and the investment required to light up the lives of the 44% of Indians who still rely on the flickering flame of a kerosene lamp to pierce the darkness of their nights. | ||
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http://lightinglab.fi/IEAAnnex45/ (lighting laboratory Helsinki university)] | [http://lightinglab.fi/IEAAnnex45/ (lighting laboratory Helsinki university)] | ||
[http://www.ecbcs.org/annexes/annex45.htm] | [http://www.ecbcs.org/annexes/annex45.htm] | ||
Revision as of 15:14, 2 June 2005
Lighting accounts for around 17% of India’s electricity consumption. Increasing the energy efficiency of lighting is one way to make enormous savings on both power generation and the investment required to light up the lives of the 44% of Indians who still rely on the flickering flame of a kerosene lamp to pierce the darkness of their nights.
(lighting laboratory Helsinki university) [2]
Deals with the usage of construction techniques to reduce the need of artificial lighting
Lighting-related electricity production for the year 1997 was 2016 TWh of which 1066 TWh was attributable to IEA member countries. Global lighting electricity use is distributed approximately 28 % to the residential sector, 48 % to the service sector, 16 % to the industrial sector, and 8 % to street and other lighting. For the industrialized countries national lighting electricity use ranges from 5 % to 15 %, while in developing countries the value can be as high as 86 % of the total electricity use. The corresponding carbon dioxide emissions were 1775 million tones, of which approximately 511 million tones was attributable to the IEA member countries.
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Wired to a small battery, the two-and-a-half-centimeter patch of plastic at General Electric's research center in Niskayuna, NY, gives off a soft white light. A version of this material could one day form large glowing sheets with the same long life as fluorescent lights but requiring less electricity. Indeed, this patch could represent the future of indoor lighting.
"You are not talking about a light bulb," says chemist Anil Duggal, manager of GE's light energy conversion program. "This stuff will be like wallpaper." The material is made up of organic light-emitting diodes-layers of organic materials that could be fabricated in sheets that are both thin and flexible.
The light-emitting diode (LED) illumination revolution is underway. Cities around the world are replacing incandescent traffic lights with arrays of LEDs, solid-state electronic lights that require less than 10 percent the power of an incandescent bulb to generate the same apparent illumination, and last up to 20 years between replacements.
The new technology is a pencil-sized probe that shines ultraviolet and visible light onto the cervix. Precancerous cells contain more mitochondria-the power plants of cells-which fluoresce when light of those wavelengths strikes them; so an increase in fluorescence means more precancerous cells. In a study of more than 100 women last year, researchers at the University of Texas at Austin and the M. D. Anderson Cancer Center in Houston, TX, found the method provided 50 percent fewer false-positive readings than standard methods.
According to the California Department of Transportation, replacement of conventional traffic-light bulbs with LEDs-red, yellow, and most recently, green-has trimmed at least $10 million from the state's annual electric bill. And nationwide, according to Strategies Unlimited, a market research firm in Mountain View, CA, LED traffic lights are becoming commonplace: as of 2002, 39 percent of red lights and 29 percent of green lights used LEDs.
LEDs have been around for many years but they’ve come a long way since the days where their most common application was to light the face of your watch. Advancing technology means that every 1 ½ years the cost of LEDs is halved, while their power doubles. As such, they have become extremely energy-efficient, using 90% less energy than a normal light bulb and lasting on average five times longer. In fact, it is possible for a single diode consuming 1/10th of a watt of electricity to produce sufficient light to read by.
The new applications run the gamut from drilling minuscule holes in PC boards to removing cavities on teeth. Lasers that operate at ultraviolet wavelengths have shown particular commercial promise in recent years. "Ultraviolet has been one of the key areas of improvement for commercial interest," said Jeffrey Pierce of Aculight Corp. Pierce will be chairing the Nonlinear Materials, Devices, and Applications II conference at Photonics West (20-26 January, San Jose), which will help focus attention on new uses of lasers.