According to foreign media reports, it is estimated that as much as two-thirds of the heat energy in the United States is wasted every year. For example, car engines, notebook computers, mobile phones, and even refrigerators will be overused to generate heat and generate heat energy. However, if such heat can be captured and converted into more energy, there will be many benefits. Mathieu Francoeur, an associate professor of mechanical engineering at the University of Utah in the United States, discovered a way to use thermal energy to generate more electrical energy than expected. Mathieu Francoeur invented a silicon chip, also known as "device", which can convert more heat radiation into electrical energy.
Researchers have previously determined that theoretically "black bodies" limit how much energy can be produced by thermal radiation (heat). However, Francoeur and the team have demonstrated that if a device made of two very close silicon surfaces can be built, it can be freed from the black body and allow the heat to generate more energy. The team made a 5mm × 5mm chip (approximately the size of an eraser head), made of two silicon wafer groups, with only a gap of about 100 nanometers between the two silicon wafer groups, which is the thickness of human hair One thousandth. When the chip was under vacuum, the researchers heated one of the surfaces while cooling the other surface, generating a heat flow that could generate electricity. Although this concept of creating energy is not unique, Francoeur and the team have developed a method that allows two silicon surfaces to fit evenly on a microscopic scale, but does not touch each other. The distance between the two surfaces The closer it is, the more electricity generated.
Francoeur envisions that in the future, this technology can not only be used to cool portable devices such as laptops and smartphones, but also convert this heat into capacity, extend battery life, and make battery operating time 50% longer than it is now. For example, a laptop full of 6 hours can be used for 9 hours.
Such chips can increase the efficiency of solar panels by increasing the power generated by solar heat; or absorb the heat of the engine on a car to provide power for the power system. In addition, such chips can be redesigned and implanted in medical devices, such as pacemakers that do not require battery replacement.
In addition, the technology can help increase the life of computer processors, keep them cool, reduce wear, save power, or use fans to cool processors. (Author: Yuqiu Yun)
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