In the United States, 15% of electricity consumption is consumed in air conditioning and other equipment.      However, it means that a considerable amount of energy consumption, any person who often use air conditioning in the payment of electricity can confirm this point.
    A team from the Stanford University presented a new technology this week. According to them, the new technology is to help people in the absence of heat to conserve electricity, because it reduces the use of air conditioning, or even completely abandoned it. The device, which is coated with a new type of material, is able to reflect the sun's rays on a plane to achieve the purpose of thermal protection. It is also able to transfer heat accumulated inside the building to the outside. As in the Nature, it can also be used to cool vehicles and buildings.
    Earlier, they said they have used heat dissipation devices to develop other systems that use the same idea to cool, but they only work when the sun is not directly exposed to the sun. Now, they have created a new multilayer material that can be used during the day. Allegedly, this material can reflect 97% of the sun's rays, so as to achieve the effect of refrigeration.
    They show that the model is a circular mirror shaped baffle, coated with multi-layer ultra-thin material, can achieve dual function. On the one hand, it can reflect the light that has been irradiated on the surface of the object to protect against heat. On the other hand, it can transfer the heat inside the building, such as infrared, directly to the outside.
     Infrared is not visible, it is a kind of electromagnetic wave and thermal radiation, its wavelength is much larger than the visible light. For example, when a person is close to the oven, but does not touch it, he felt the heat is infrared.
     The researchers said that their equipment can reduce the temperature of the building 5 degrees celsius. And on a sunny winter day in Standford, California. The main person in charge of the study, Raman (Aaswath), said: "during the day we put the refrigeration equipment in the sun for 7 hours, the night is placed a little shorter time. During the test, the temperature near the cooling equipment was between 9 and 17 degrees celsius."
     The scientists suggest using these "mirrors" to cover the roof because it is designed to be inexpensive to install and use on a large scale. Luo Man said, we believe that if we continue to research and development, the technology can be used in 3 to 5 years". Before, they should create larger panels, and improve the technology, so that the heat from the interior of the building more effectively distributed
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