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Incandescent Bulb Luminous Efficiency Also Increases Correspondingly

Oct 19, 2017

At present, the new incandescent bulb only exists in theory, which means that there is no possibility of listing in the short term.

Compared with traditional bulbs, the advantages of LED bulbs are self-evident. It is almost possible to assert that the LED bulb will appear in every corner of our lives in the future. The biggest advantage of LED bulb is energy saving, but its shortcoming is also very obvious, that is not "warm".

Is the energy saving must reduce the bulb itself calorific value? The answer must not be the case. Recently, MIT's research and development team proposed a new solution. MIT researchers have developed a brand new incandescent bulb that absorbs the heat it emits and then converts the heat into electricity to make it glow. After such a cycle, the new incandescent bulb is more energy-efficient than LED bulbs.

In fact, the new incandescent bulb does not change the traditional principle of incandescent bulbs, but only on the surface of the bulb attached a layer of crystal filter. The function of this filter is: After the light source is emitted, you can reflect the infrared wave to the filament at the same time, and then the filament absorbs the light and converts it into electricity to glow again. And so on, cycle until the light is off.

But to hear this, you are not too excited to be a fan of incandescent bulbs. At present, this new type of incandescent light bulb only exists in theory,Incandescent Bulb  which means that there is no possibility of listing in the short term. But the team said they were very confident that the theory would become a reality.

The incandescent lamp heats the filament to an incandescent state, using thermal radiation to emit visible light. Since 1879, the American inventor Alva made the carbonized fiber (ie carbon filament) incandescent lamp, after the people to the filament material, the filament structure,Incandescent Bulb  the filling gas unceasing improvement, the incandescent lamp luminous efficiency also enhances correspondingly.

Incandescent bulbs are made of heat-resistant glass and are filled with tungsten wire. Soak the air inside the shell, lest the filament oxidize, or refill the inert gas (such as argon), reduce the heating sublimation of the tungsten wire. Because the filament consumes only a small fraction into visible light,Incandescent Bulb  the luminous efficiency is low, generally 6. $number Flow/tile.

The end of incandescent lamp life is mainly filament rupture. So the life of the incandescent lamp depends mainly on the filament life. When the incandescent lamp is working, the filament evaporates at high temperature, the section gradually becomes smaller, and a certain degree of rupture occurs. The higher the working temperature, the faster the filament evaporates and the shorter the life expectancy. Reduce the filament working temperature, can make the filament evaporation speed significantly reduced,Incandescent Bulb  so can greatly prolong the filament life. But when the filament working temperature is lowered, the luminous efficiency will be reduced obviously. Therefore, after weighing the life and light efficiency, the manufacturer determined an appropriate filament operating temperature, working at this temperature, the average life of the incandescent filament is about 1000 hours.