Energy-saving lamps can save electricity and save money
On August 10th, the website of the China Consumers Association published the article “Which lights are energy-saving and the results of cash-saving comparisons are clear at a glanceâ€, and the report of the energy-saving lamps released by China Consumers Association and Beijing, Shanghai and Guangdong Consumers Association was released. . The report shows that due to various reasons, the energy-saving lamp products sold in China show the status quo of “saving electricity and not saving moneyâ€.
Why is the energy saving lamp saving power?
"Energy-saving lamps themselves are still energy-saving. From the data point of view, compared with ordinary incandescent lamps, energy-saving lamps have an energy-saving effect of up to 80%." Secretary-General Liu of China Lighting Society opened the door to point out the energy-saving effect of energy-saving lamps.
In fact, the energy-saving lamp can save electricity mainly because it uses the principle of gas discharge. Its scientific name is self-ballasted fluorescent lamp. In addition to white (cold light), there is still yellow (warm light). In general, the same wattage, energy-saving lamps are 80% more energy efficient than incandescent lamps, with an average lifespan of 8 times and heat radiation of only 20%. In the non-strict case, a 5 watt energy-saving lamp can be regarded as an incandescent lamp equal to 25 watts, a 7-watt energy-saving lamp is about 40 watts, and a 9-watt is equivalent to 60 watts.
The energy-saving lamp is also called compact fluorescent lamp (referred to as CFL lamp in foreign countries). It was first invented by foreign manufacturers in 1978, and it has a strong energy-saving effect compared to incandescent lamps. The working principle of an ordinary incandescent lamp is: when the lamp is connected to the circuit, the current flows through the filament, and the thermal effect of the current causes the incandescent lamp to emit continuous visible light and infrared rays. This phenomenon can be detected when the temperature of the filament rises to 700K, due to work The filament temperature is very high, and most of the energy is wasted in the form of infrared radiation. Since the filament temperature is high and the evaporation is fast, the life is also greatly shortened, about 1000 hours.
The energy-saving lamp mainly heats the filament of the lamp through the ballast. At about 1160K, the filament starts to emit electrons (because some electron powder is coated on the filament), and the electron collides with the argon atom to produce an inelastic collision. After the argon atom collides, the argon atom collides. The energy is absorbed and hits the mercury atom. The mercury atom breaks and generates ionization after absorbing energy. It emits 253.7nm ultraviolet light, and the ultraviolet light excites the phosphor to emit light. The temperature of the filament is about 1160K when the fluorescent lamp works, and the temperature is 2200K-2700K than that of the incandescent lamp. It is much lower, so its life is greatly improved, reaching more than 5,000 hours. Because it does not have the current thermal effect like incandescent lamps, the energy conversion efficiency of the phosphor is also very high, reaching more than 50 lumens per watt.
When the author visited a large supermarket in Zhongguancun, the salesman of the energy-saving lamp gave us an account: one hour of the ordinary lighting of 100 watts in the home, the energy-saving lamp only needs 25 watts, and the power can be saved in two weeks. If you calculate it at 0.5 yuan per kilowatt hour, you can save money for an energy-saving lamp in one year. According to experts' calculations, if 1.2 billion energy-saving lamps are promoted and used nationwide, the power-saving effect is equivalent to the construction of a new Three Gorges power station.
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