Induction lamps and LEDs entering the community will gradually occupy the market in the next few years
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At 8:30 in the morning of December 18, the Yongshan Community in Fengtai District, a “electrodeless lamp†that is more energy efficient than energy-saving lamps, attracted residents together early in the morning.
From the appearance, the electrodeless lamp or the long lamp, or the round bulb, is not much different from the ordinary lamp. A demonstrator started a "test" on the spot: he lit a 30-watt induction lamp and a 100-watt energy-saving lamp at the same time. The induction lamp emits a bright but not glaring white light, and its brightness exceeds that of the energy-saving lamp. Residents began to talk.
High frequency electrodeless lamp production workshop
The demonstrator is Zhao Yanfeng, chief engineer of an electrodeless lamp manufacturer in Jiangsu. He told the author: "Unlike ordinary lamps, there is no electrode in the electrodeless lamp."
Liang Rongqing, a professor at the Institute of Electric Light Sources at Fudan University in Shanghai, said that the well-known incandescent lamps use tungsten wire with a melting point of up to 3000 °C. When the current passes through the tungsten wire, heat is generated, and the spiral filament continuously collects heat. When the temperature reaches 2000 ° C or higher, the filament emits light. But the heat of incandescent lamps is not all converted into light energy, and some of them are lost in the air, which makes the power consumption of incandescent lamps always high.
The principle of illumination of energy-saving lamps is different from that of incandescent lamps. The scientific name of this kind of lamp is called "compact fluorescent lamp". When energized, the current will excite the mercury atoms in the bulb to release ultraviolet light that is invisible to the human eye. These ultraviolet rays hit the phosphor coated on the inner wall of the bulb and turn into visible light. This kind of illumination can convert more electric energy into light energy, thus achieving the purpose of saving electricity. However, like incandescent lamps, the current of an energy-saving lamp is generated by the voltage across the electrodes.
The principle of illumination of an induction lamp is the same as that of an energy-saving lamp, but the current required for it is otherwise "source". After the power is turned on, the current does not directly pass through the electrodeless lamp; the high-frequency current causes the induction coil of the electrodeless lamp to generate a magnetic field, thereby generating an electric field to form a current. The induction lamp illumination is caused by this newly generated current. Because there is no discharge loss of the positive and negative poles, its power saving capability exceeds that of the energy saving lamp.
“Under the same brightness, the number of watts required for the electrodeless lamp is much smaller than that of the energy-saving lamp.†Zhao Yanfeng calculated the account: If the light is turned on for 10 hours, the incandescent lamp must consume 1 degree to reach the brightness of the 100-watt incandescent lamp. Electricity, ordinary energy-saving lamps consume 0.4 to 0.5 kWh, while induction lamps consume less than 0.2 kWh. At present, the Beijing Olympic Rowing Center, Shanghai Pudong Machine, Guangzhou Baiyunshan Pharmaceutical Factory, Shenzhen Airport Freight Warehouse and many other places have begun to use the induction lamp.
In fact, the electrodeless lamp is not a new invention. As early as 100 years ago, American scientists invented the electrodeless lamp. However, due to technical limitations, such lamps have only existed in the laboratory. It was not until the early 1990s that it officially began commercial production. In recent years, some manufacturers of induction lamps have emerged in China, but most of them are exported to foreign countries due to high cost.
Liang Rongqing told the author that the current energy-saving lamps are limited by the design principle, and the energy-saving efficiency has reached an optimal state. New light sources such as induction lamps and LED lamps have become the recognized development direction of future energy-saving light sources.
Among them, the LED lamp is called "the fourth generation light source", which is a semiconductor solid-state light-emitting device, which has the best energy-saving effect, brightness control, and good earthquake resistance. It is used as a lamp in many high-end cars. These new light sources are much better than ordinary energy-saving lamps in terms of energy efficiency, longevity, and color rendering. Color rendering is an important aspect of evaluating the quality of light sources. It is generally believed that the closer the light source is to the light source, the better the color rendering, and the more the color of the thing itself can be restored.
"Although the performance of these new light sources is very good, there are still some problems in the promotion." Liang Rongqing said that taking the electrodeless lamp as an example, its special light-emitting principle makes it exist in radiation. Many people believe that radiation can cause harm to the human body. But in fact, when making an electrodeless lamp, it will be wrapped with a conductive transparent film to isolate the radiation; and the electrodeless lamp also needs to meet the international standards and national standards for electromagnetic safety. In addition, cost is another problem that affects the popularity of induction lamps. The same wattage of induction lamps is more than twice as expensive as energy-saving lamps.
“Many people advocate the construction of low-carbon communities, but they all stay on the propaganda of theory. In fact, to let the people really understand what is energy-saving and low-carbon life, they must let them have personal experience.†Department of Public Administration, Beijing Administration College Professor Wu Gang told the Beijing Science and Technology News that let the induction lamp enter the community and strengthen the residents' awareness of energy conservation with a real experience.
According to statistics, China's lighting power consumption accounts for about 20% of the total electricity consumption. By 2010, if one-third of China's existing lighting sources use LED lights, it can save 150 billion kWh. According to the existing power and energy structure estimates, it is equivalent to reducing 25 to 432,000 tons of carbon dioxide and reducing sulfur dioxide emissions by 1.35 million tons. Liang Rongqing believes that with the development of science and technology, in the next few years, various new energy-saving light sources will gradually occupy the market. 